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Videos uploaded by user “kudvenkat”
Part 33 - C# Tutorial - Difference between abstract classes and interfaces.avi
 
05:15
Text version of the video http://csharp-video-tutorials.blogspot.com/2012/06/part-33-c-tutorial-difference-between.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-33-abstract-classes-vs-interfaces.html All C# Text Articles http://csharp-video-tutorials.blogspot.co.uk/p/free-c-video-tutorial-for-beginners.html All C# Slides http://csharp-video-tutorials.blogspot.com/p/c.html Complete C# tutorial https://www.youtube.com/playlist?list=PLAC325451207E3105 All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this part of the c sharp tutorial we will learn about the differences between abstract classes and interfaces
Views: 346011 kudvenkat
Part 5   ASP NET Web API Content Negotiation
 
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In this video we will discuss Content Negotiation in Web API. Text version of the video http://csharp-video-tutorials.blogspot.com/2016/09/aspnet-web-api-content-negotiation.html Slides http://csharp-video-tutorials.blogspot.com/2016/09/aspnet-web-api-content-negotiation_5.html Dot Net and SQL Server Tutorials https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All ASP.NET Web API Text Articles and Slides http://csharp-video-tutorials.blogspot.com/2016/09/aspnet-web-api-tutorial-for-beginners.html
Views: 197338 kudvenkat
Part 36 - C# Tutorial - Delegates in c#.avi
 
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In this c sharp tutorial we will learn the basics of delegates Text version of the video http://csharp-video-tutorials.blogspot.com/2012/06/part-36-c-tutorial-delegates.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-36-delegates.html All C# Text Articles http://csharp-video-tutorials.blogspot.co.uk/p/free-c-video-tutorial-for-beginners.html All C# Slides http://csharp-video-tutorials.blogspot.com/p/c.html Complete C# tutorial https://www.youtube.com/playlist?list=PLAC325451207E3105 All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 423618 kudvenkat
Indexes in sql server   Part 35
 
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In this video we will learn about What are indexes Why do we use indexes Advantages of indexes These concepts are applicable to sql server 2000, 2005 and 2008 Text version of the video http://csharp-video-tutorials.blogspot.com/2012/09/indexes-in-sql-server-part-35.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-35-indexes.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 414953 kudvenkat
Closures in JavaScript
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/12/closures-in-javascript.html In this video we will understand closures in JavaScript with an example. What is a closure A closure is an inner function that has access to the outer function’s variables in addition to it's own variables and global variables. The inner function has access not only to the outer function’s variables, but also to the outer function’s parameters. You create a closure by adding a function inside another function. JavaScript Closure Example function addNumbers(firstNumber, secondNumber) { var returnValue = "Result is : "; // This inner function has access to the outer function's variables & parameters function add() { return returnValue + (firstNumber + secondNumber); } return add(); } var result = addNumbers(10, 20); document.write(result); Output : Result is : 30 The following code Returns the inner function expression function addNumbers(firstNumber, secondNumber) { var returnValue = "Result is : "; function add() { return returnValue + (firstNumber + secondNumber); } // We removed the parentheses. This will return the inner function expression without executing it. return add; } // addFunc will contain add() function (inner function) expression. var addFunc = addNumbers(10, 20); // call the addFunc() function and store the return value in result variable var result = addFunc(); document.write(result); Returning and executing the inner function function addNumbers(firstNumber, secondNumber) { var returnValue = "Result is : "; function add() { return returnValue + (firstNumber + secondNumber); } // We removed the parentheses. This will return the inner function add() expression without executing it. return add; } // This returns add() function (inner function) definition and executes it. Notice the additonal parentheses. var result = addNumbers(10, 20)(); document.write(result);
Views: 87712 kudvenkat
Part 4   Delete duplicate rows in sql
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-4-delete-duplicate-rows-in-sql.html In this video, we will discuss deleting all duplicate rows except one from a sql server table. SQL Script to create Employees table Create table Employees ( ID int, FirstName nvarchar(50), LastName nvarchar(50), Gender nvarchar(50), Salary int ) GO Insert into Employees values (1, 'Mark', 'Hastings', 'Male', 60000) Insert into Employees values (1, 'Mark', 'Hastings', 'Male', 60000) Insert into Employees values (1, 'Mark', 'Hastings', 'Male', 60000) Insert into Employees values (2, 'Mary', 'Lambeth', 'Female', 30000) Insert into Employees values (2, 'Mary', 'Lambeth', 'Female', 30000) Insert into Employees values (3, 'Ben', 'Hoskins', 'Male', 70000) Insert into Employees values (3, 'Ben', 'Hoskins', 'Male', 70000) Insert into Employees values (3, 'Ben', 'Hoskins', 'Male', 70000) The delete query should delete all duplicate rows except one. Here is the SQL query that does the job. PARTITION BY divides the query result set into partitions. WITH EmployeesCTE AS ( SELECT *, ROW_NUMBER()OVER(PARTITION BY ID ORDER BY ID) AS RowNumber FROM Employees ) DELETE FROM EmployeesCTE WHERE RowNumber ] 1
Views: 365449 kudvenkat
Part 53   Difference between html.partial and html.renderpartial
 
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Link for code samples used in the demo http://csharp-video-tutorials.blogspot.com/2013/07/part-53-difference-between-htmlpartial.html Link for csharp, asp.net, ado.net, dotnet basics, mvc and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists In this video, we will discuss the difference between Partial() and RenderPartial() html helper methods. Both of these helper methods are used for rendering partial views. Differences: 1. The return type of "RenderPartial" is void, where as "Partial" returns "MvcHtmlString" 2. Syntax for invoking Partial() and RenderPartial() methods in Razor views @Html.Partial("PartialViewName") @{ Html.RenderPartial("PartialViewName"); } 3. Syntax for invoking Partial() and RenderPartial() methods in webform views [%: Html.Partial("PartialViewName") %] [% Html.RenderPartial("PartialViewName"); %] The following are the 2 common interview questions related to Partial() and RenderPartial() When would you use Partial() over RenderPartial() and vice versa? The main difference is that "RenderPartial()" returns void and the output will be written directly to the output stream, where as the "Partial()" method returns MvcHtmlString, which can be assigned to a variable and manipulate it if required. So, when there is a need to assign the output to a variable for manipulating it, then use Partial(), else use RenderPartial(). Which one is better for performance? From a performance perspective, rendering directly to the output stream is better. RenderPartial() does exactly the same thing and is better for performance over Partial(). Note: Make sure to replace [ with LESSTHAN and ] with GREATERTHAN symbol.
Views: 122578 kudvenkat
Part 6  ViewData and ViewBag in mvc
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2013/04/part-6-viewdata-and-viewbag-in-mvc.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-6-view-data-and-view-bag-in-mvc.html All ASP .NET MVC Text Articles http://csharp-video-tutorials.blogspot.com/p/aspnet-mvc-tutorial-for-beginners.html All ASP .NET MVC Slides http://csharp-video-tutorials.blogspot.com/p/aspnet-mvc-slides.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss 1. What is ViewData 2. What is ViewBag 3. Difference between ViewData and ViewBag Both ViewData and ViewBag are used to pass data from a controller to a view. ViewData is a dictionary of objects that are stored and retrieved using strings as keys. The syntax of ViewData is very similar to that of ViewState, SessionState and ApplicationState. // Storing data in ViewData ViewData["YourData"] = "SomeData"; // Retrieving data from ViewData string strData = ViewData["YourData"].ToString(); ViewData does not provide compile time error checking. For example, if you mis-spell the key names you wouldn't get any compile time error. You get to know about the error only at runtime. ViewBag uses the dynamic feature that was introduced in to C# 4. It allows an object to have properties dynamically added to it. Using ViewBag the above code can be rewritten as below. // Storing data in ViewBag ViewBag.YourData = "SomeData"; // Retrieving data from ViewBag string strData = ViewBag.YourData; Just like ViewData, ViewBag does not provide compile time error checking. For example, if you mis-spell the property name, you wouldn't get any compile time error. You get to know about the error only at runtime. Internally ViewBag properties are stored as name/value pairs in the ViewData dictionary. Please Note: To pass data from controller to a view, It's always a good practice to use strongly typed view models instead of using ViewBag & ViewData. Strongly typed view models provide compile time error checking. We will discuss view models in a later video session.
Views: 468713 kudvenkat
Over clause in SQL Server
 
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over partition by in sql server 2008 sql server over clause partition partition by clause in sql server 2008 over partition by clause in sql In this video we will discuss the power and use of Over clause in SQL Server. The OVER clause combined with PARTITION BY is used to break up data into partitions. Syntax : function (...) OVER (PARTITION BY col1, Col2, ...) The specified function operates for each partition. For example : COUNT(Gender) OVER (PARTITION BY Gender) will partition the data by GENDER i.e there will 2 partitions (Male and Female) and then the COUNT() function is applied over each partition. Any of the following functions can be used. Please note this is not the complete list. COUNT(), AVG(), SUM(), MIN(), MAX(), ROW_NUMBER(), RANK(), DENSE_RANK() etc. Example : SQl Script to create Employees table Create Table Employees ( Id int primary key, Name nvarchar(50), Gender nvarchar(10), Salary int ) Go Insert Into Employees Values (1, 'Mark', 'Male', 5000) Insert Into Employees Values (2, 'John', 'Male', 4500) Insert Into Employees Values (3, 'Pam', 'Female', 5500) Insert Into Employees Values (4, 'Sara', 'Female', 4000) Insert Into Employees Values (5, 'Todd', 'Male', 3500) Insert Into Employees Values (6, 'Mary', 'Female', 5000) Insert Into Employees Values (7, 'Ben', 'Male', 6500) Insert Into Employees Values (8, 'Jodi', 'Female', 7000) Insert Into Employees Values (9, 'Tom', 'Male', 5500) Insert Into Employees Values (10, 'Ron', 'Male', 5000) Go Write a query to retrieve total count of employees by Gender. Also in the result we want Average, Minimum and Maximum salary by Gender. This can be very easily achieved using a simple GROUP BY query as show below. SELECT Gender, COUNT(*) AS GenderTotal, AVG(Salary) AS AvgSal, MIN(Salary) AS MinSal, MAX(Salary) AS MaxSal FROM Employees GROUP BY Gender What if we want non-aggregated values (like employee Name and Salary) in result set along with aggregated values You cannot include non-aggregated columns in the GROUP BY query. SELECT Name, Salary, Gender, COUNT(*) AS GenderTotal, AVG(Salary) AS AvgSal, MIN(Salary) AS MinSal, MAX(Salary) AS MaxSal FROM Employees GROUP BY Gender The above query will result in the following error : Column 'Employees.Name' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause One way to achieve this is by including the aggregations in a subquery and then JOINING it with the main query as shown in the example below. Look at the amount of T-SQL code we have to write. SELECT Name, Salary, Employees.Gender, Genders.GenderTotals, Genders.AvgSal, Genders.MinSal, Genders.MaxSal FROM Employees INNER JOIN (SELECT Gender, COUNT(*) AS GenderTotals, AVG(Salary) AS AvgSal, MIN(Salary) AS MinSal, MAX(Salary) AS MaxSal FROM Employees GROUP BY Gender) AS Genders ON Genders.Gender = Employees.Gender Better way of doing this is by using the OVER clause combined with PARTITION BY SELECT Name, Salary, Gender, COUNT(Gender) OVER(PARTITION BY Gender) AS GenderTotals, AVG(Salary) OVER(PARTITION BY Gender) AS AvgSal, MIN(Salary) OVER(PARTITION BY Gender) AS MinSal, MAX(Salary) OVER(PARTITION BY Gender) AS MaxSal FROM Employees Text version of the video http://csharp-video-tutorials.blogspot.com/2015/09/over-clause-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/09/over-clause-in-sql-server_29.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 95496 kudvenkat
Part 32 - C# Tutorial - Abstract classes in c#.avi
 
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In this part of the c sharp tutorial we will learn about abstract classes Text version of the video http://csharp-video-tutorials.blogspot.com/2012/06/part-32-c-tutorial-abstract-classes.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-32-abstract-classes.html All C# Text Articles http://csharp-video-tutorials.blogspot.co.uk/p/free-c-video-tutorial-for-beginners.html All C# Slides http://csharp-video-tutorials.blogspot.com/p/c.html Complete C# tutorial https://www.youtube.com/playlist?list=PLAC325451207E3105 All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 301441 kudvenkat
FIRST VALUE function in SQL Server
 
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In this video we will discuss FIRST_VALUE function in SQL Server FIRST_VALUE function Introduced in SQL Server 2012 Retrieves the first value from the specified column ORDER BY clause is required PARTITION BY clause is optional Syntax : FIRST_VALUE(Column_Name) OVER (ORDER BY Col1, Col2, ...) FIRST_VALUE function example WITHOUT partitions : In the following example, FIRST_VALUE function returns the name of the lowest paid employee from the entire table. SELECT Name, Gender, Salary, FIRST_VALUE(Name) OVER (ORDER BY Salary) AS FirstValue FROM Employees FIRST_VALUE function example WITH partitions : In the following example, FIRST_VALUE function returns the name of the lowest paid employee from the respective partition. SELECT Name, Gender, Salary, FIRST_VALUE(Name) OVER (PARTITION BY Gender ORDER BY Salary) AS FirstValue FROM Employees Text version of the video http://csharp-video-tutorials.blogspot.com/2015/10/firstvalue-function-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/10/firstvalue-function-in-sql-server_6.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 36434 kudvenkat
Difference between where and having in sql server
 
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sql server where vs having sql server group by where having group by having sql server In this vide we will discuss the difference between where and having caluses in sql server. Let us understand the difference with an example. To calculate total sales by product, we would write a GROUP BY query as shown below SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales GROUP BY Product Now if we want to find only those products where the total sales amount is greater than $1000, we will use HAVING clause to filter products SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales GROUP BY Product HAVING SUM(SaleAmount) ] 1000 If we use WHERE clause instead of HAVING clause, we will get a syntax error. This is because the WHERE clause doesn’t work with aggregate functions like sum, min, max, avg, etc. SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales GROUP BY Product WHERE SUM(SaleAmount) ] 1000 So in short, the difference is WHERE clause cannot be used with aggregates where as HAVING can. However, there are other differences as well that we need to keep in mind when using WHERE and HAVING clauses. WHERE clause filters rows before aggregate calculations are performed where as HAVING clause filters rows after aggregate calculations are performed. Let us understand this with an example. Total sales of iPhone and Speakers can be calculated by using either WHERE or HAVING clause Calculate Total sales of iPhone and Speakers using WHERE clause : In this example the WHERE clause retrieves only iPhone and Speaker products and then performs the sum. SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales WHERE Product in ('iPhone', 'Speakers') GROUP BY Product Calculate Total sales of iPhone and Speakers using HAVING clause : This example retrieves all rows from Sales table, performs the sum and then removes all products except iPhone and Speakers. SELECT Product, SUM(SaleAmount) AS TotalSales FROM Sales GROUP BY Product HAVING Product in ('iPhone', 'Speakers') So from a performance standpoint, HAVING is slower than WHERE and should be avoided when possible. Another difference is WHERE comes before GROUP BY and HAVING comes after GROUP BY. Difference between WHERE and Having 1. WHERE clause cannot be used with aggregates where as HAVING can. This means WHERE clause is used for filtering individual rows where as HAVING clause is used to filter groups. 2. WHERE comes before GROUP BY. This means WHERE clause filters rows before aggregate calculations are performed. HAVING comes after GROUP BY. This means HAVING clause filters rows after aggregate calculations are performed. So from a performance standpoint, HAVING is slower than WHERE and should be avoided when possible. 3. WHERE and HAVING can be used together in a SELECT query. In this case WHERE clause is applied first to filter individual rows. The rows are then grouped and aggregate calculations are performed, and then the HAVING clause filters the groups. Text version of the video http://csharp-video-tutorials.blogspot.com/2015/09/difference-between-where-and-having-in.html Slides http://csharp-video-tutorials.blogspot.com/2015/09/difference-between-where-and-having-in_15.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html Full SQL Server Course https://www.youtube.com/playlist?list=PL4cyC4G0M1RQ_Rm52cQ4CcOJ_T_HXeMB4 All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 74815 kudvenkat
Clustered and nonclustered indexes in sql server   Part 36
 
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In this video we will learn about 1. Different types of indexes in sql server 2. What are clustered indexes 3. What are NonClustered indexes 4. Difference between clustered and non clustered indexes Text version of the video http://csharp-video-tutorials.blogspot.co.uk/2012/09/clustered-and-non-clustered-indexes.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-36-clustered-nonclustered-indexes.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 503033 kudvenkat
Part 24 - C# Tutorial - Difference between method overriding and method hiding.avi
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2012/06/part-24-c-tutorial-difference-between.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-24-method-overriding-vs-method.html All C# Text Articles http://csharp-video-tutorials.blogspot.co.uk/p/free-c-video-tutorial-for-beginners.html All C# Slides http://csharp-video-tutorials.blogspot.com/p/c.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this part of the c sharp tutorial we will learn the difference between method overriding and method hiding
Views: 274673 kudvenkat
Part 1   Introduction to WCF
 
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Link for code samples used in the demo http://csharp-video-tutorials.blogspot.com/2013/11/part-1-introduction-to-wcf.html Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists In this video we will discuss What is WCF Why should we use WCF What is WCF? WCF stands for Windows Communication Foundation and is part of .NET 3.0. WCF is Microsoft platform for building distributed and interoperable applications. What is a distributed application? In simple terms a distributed application, is an application where parts of it run on 2 or more computers. Distributed applications are also called as connected systems or applications. Examples: A web application running on one machine and a web service that this application is consuming is running on another machine. An enterprise web application may have the following tiers, and each tier may be running on a different machine 1. Presentation tier 2. Business tier 3. Data Access tier Why build distributed applications? There are several reasons for this 1. An enterprise application may need to use the services provided by other enterprises. For example an ecommerce application may be using paypal service for payments. 2. For better scalability. An enterprise web application may have Presentation tier, Business tier, and Data Access tiert, and each tier may be running on a different machine. What is an interoperable application? An application that can communicate with any other application that is built on any platform and using any programming language is called as an interoperable application. Web services are interoperable, where as .NET remoting services are not. Web services can communicate with any application built on any platform, where as a .NET remoting service can be consumed only by a .net application. What technology choices did we have before WCF to build distributed applications? Enterprise Services Dot Net Remoting Web Services Why should we use WCF? Let's take this scenario We have 2 clients and we need to implement a service a for them. 1. The first client is using a Java application to interact with our service, so for interoperability this client wants messages to be in XML format and the protocol to be HTTP. 2. The second client uses .NET, so for better performance this client wants messages formmated in binary over TCP protocol. Without WCF 1. To satisfy the first client requirement we end up implementing an ASMX web service, and 2. To satisfy the second client requirement we end up implementing a remoting service These are 2 different technologies, and have complete different programming models. So the developers have to learn different technologies. So to unify and bring all these technologies under one roof Microsoft has come up with a single programming model that is called as WCF - Windows Communication Foundation. With WCF, You implement one service and we can configure as many end points as want to support all the client needs. To support the above 2 client requirements, we would configure 2 end points. In the endpoint configuration we can specify the protocols and message formats that we want to use. In Part 2, we will discuss implementing 1. A web service to exchange messages in XML format using HTTP protocol for interoperability. 2. A remoting service to exchange messages in binary format using TCP protocol for performance. Along the way, we will get a feel of how different these technologies are. In Part 3, we will dicuss implementing a single WCF Service and configuring different end points to support different transport protocols and message formats.
Views: 787547 kudvenkat
Database normalization   Part 52
 
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In this video we will learn about, database normalization, different normal forms, problems of data redundancy, first normal form, that is how to put a table in 1 NF. Text version of the video http://csharp-video-tutorials.blogspot.com/2012/09/database-normalization-part-52.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-52-normalization.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 195413 kudvenkat
Part 3   Why and when should we use an abstract class
 
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Link for code samples used in the demo http://csharp-video-tutorials.blogspot.com/2013/09/part-3-why-and-when-should-we-use.html Link for csharp, asp.net, ado.net, dotnet basics, mvc and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists This question can also be asked in a slightly different way Give an example of where we could use an abstract class? Let us understand when to use an abstract class with an example. An organisation has 2 types of employees 1. FullTimeEmployee 2. ContractEmployee We would create an abstract class, when want to move the common functionality of 2 or more related classes into a base class and when, we don't want that base class to be instantiated.
Views: 569649 kudvenkat
Part 69   Action filters in mvc
 
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Link for code samples used in the demo http://csharp-video-tutorials.blogspot.com/2013/08/part-69-action-filters-in-mvc.html Link for csharp, asp.net, ado.net, dotnet basics, mvc and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists What are action filters in asp.net mvc? Action filters are attributes that can be applied either on a controller action method or on a controller. When applied at the controller level, they are applicable for all actions within that controller. Action filters allow us to add, pre and post processing logic to an action method. This means, they allow us to modify the way in which an action is executed. Name a few action filters in mvc? Authorize ChildActionOnly HandleError OutputCache RequireHttps ValidateInput ValidateAntiForgeryToken We will discuss each of these action filters in detail in our upcoming videos. Can you create a custom action filter in mvc? Yes, we will discuss this in a later video session.
Views: 105660 kudvenkat
Advantages of stored procedures   Part 21
 
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Benefits of using stored procedures over inline sql or adhoc sql Text version of the video http://csharp-video-tutorials.blogspot.com/2012/08/advantages-of-using-stored-procedures.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-21-advantages-of-stored-procedures.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 232427 kudvenkat
Part 31 - C# Tutorial - Explicit interfaces implementation.avi
 
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In this part of the c sharp tutorial we will learn about explicit interface implementation. Text version of the video http://csharp-video-tutorials.blogspot.com/2012/06/part-31-c-tutorial-explicit-interface.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-31-explicit-interface.html All C# Text Articles http://csharp-video-tutorials.blogspot.co.uk/p/free-c-video-tutorial-for-beginners.html All C# Slides http://csharp-video-tutorials.blogspot.com/p/c.html Complete C# tutorial https://www.youtube.com/playlist?list=PLAC325451207E3105 All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 255422 kudvenkat
Part 9   Call an abstract method from an abstract class constructor
 
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Link for code samples used in the demo http://csharp-video-tutorials.blogspot.com/2013/10/part-9-call-abstract-method-from.html Link for csharp, asp.net, ado.net, dotnet basics, mvc and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Can you call an abstract method from an abstract class constructor? If so, what is the use of it? Yes, an abstract method can be called from an abstract class constructor. Here is an example. public class Program { public static void Main() { CorporateCustomer CC = new CorporateCustomer(); SavingsCustomer SC = new SavingsCustomer(); } } public abstract class Customer { protected Customer() { Print(); } public abstract void Print(); } public class CorporateCustomer : Customer { public override void Print() { Console.WriteLine("CorporateCustomer Print() method implementation called"); } } public class SavingsCustomer : Customer { public override void Print() { Console.WriteLine("SavingsCustomer Print() method implementation called"); } } An abstract method in an abstract class does not have any implementation, so what is the use of calling it from the abstract class constructor? If you want the abstract method to be invoked automatically whenever an instance of the class that is derived from the abstract class is created, then we would call it in the constructor of the abstract class.
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Part 10   What happens if finally block throws an exception
 
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Link for code samples used in the demo http://csharp-video-tutorials.blogspot.com/2013/10/part-10-what-happens-if-finally-block.html Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists This question can also be asked in a slightly different way How to handle exceptions that occur in finally block The exception propagates up, and should be handled at a higher level. If the exception is not handled at the higher level, the application crashes. The "finally" block execution stops at the point where the exception is thrown. In the example below, notice that the "finally" block in "Hello()" method throws an exception. Hello() method is being called in the Main() method and we don't have any exception handling mechanism in place in the Main() method. So, the application crashes with the exception. public class Program { public static void Main() { Hello(); } public static void Hello() { try { // Some code } catch { // Some code } finally { Console.WriteLine("This line will be executed"); int result = Convert.ToInt32("TEN"); Console.WriteLine("This line will NOT be executed"); } } } On the other hand, if you include exception handling mechanism(try/catch) in the Main() method, then you will have the opportunity to handle the exception. public static void Main() { try { Hello(); } catch (Exception ex) { // Process and log the exception Console.WriteLine(ex.Message); } } Irrespective of whether there is an exception or not "finally" block is guaranteed to execute. 1. If the "finally" block is being executed after an exception has occurred in the try block, 2. and if that exception is not handled 3. and if the finally block throws an exception Then the original exception that occurred in the try block is lost. Here is an example: public class Program { public static void Main() { try { Hello(); } catch (Exception ex) { Console.WriteLine(ex.Message); } } public static void Hello() { try { // This exception will be lost throw new Exception("Exception in TRY block"); } finally { throw new Exception("Exception in FINALLY block"); } } }
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Part 30 - C# Tutorial - Interfaces in c#.avi
 
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In this part of the c sharp tutorial we will learn about interfaces Text version of the video http://csharp-video-tutorials.blogspot.com/2012/06/part-30-c-tutorial-interfaces-in-c.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-30-introduction-to-interfaces.html All C# Text Articles http://csharp-video-tutorials.blogspot.co.uk/p/free-c-video-tutorial-for-beginners.html All C# Slides http://csharp-video-tutorials.blogspot.com/p/c.html Complete C# tutorial https://www.youtube.com/playlist?list=PLAC325451207E3105 All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
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Group by in sql server - Part 11
 
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In this video we will learn 1. Grouping rows using GROUP BY 2. Filtering Groups 3. Difference between WHERE and HAVING clause in sql server Text version of the video http://csharp-video-tutorials.blogspot.com/2012/08/group-by-part-11.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-11-group-by.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 458344 kudvenkat
Rank and Dense Rank in SQL Server
 
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rank and dense_rank example difference between rank and dense_rank with example rank vs dense_rank in sql server 2008 sql server difference between rank and dense_rank In this video we will discuss Rank and Dense_Rank functions in SQL Server Rank and Dense_Rank functions Introduced in SQL Server 2005 Returns a rank starting at 1 based on the ordering of rows imposed by the ORDER BY clause ORDER BY clause is required PARTITION BY clause is optional When the data is partitioned, rank is reset to 1 when the partition changes Difference between Rank and Dense_Rank functions Rank function skips ranking(s) if there is a tie where as Dense_Rank will not. For example : If you have 2 rows at rank 1 and you have 5 rows in total. RANK() returns - 1, 1, 3, 4, 5 DENSE_RANK returns - 1, 1, 2, 3, 4 Syntax : RANK() OVER (ORDER BY Col1, Col2, ...) DENSE_RANK() OVER (ORDER BY Col1, Col2, ...) RANK() and DENSE_RANK() functions without PARTITION BY clause : In this example, data is not partitioned, so RANK() function provides a consecutive numbering except when there is a tie. Rank 2 is skipped as there are 2 rows at rank 1. The third row gets rank 3. DENSE_RANK() on the other hand will not skip ranks if there is a tie. The first 2 rows get rank 1. Third row gets rank 2. SELECT Name, Salary, Gender, RANK() OVER (ORDER BY Salary DESC) AS [Rank], DENSE_RANK() OVER (ORDER BY Salary DESC) AS DenseRank FROM Employees RANK() and DENSE_RANK() functions with PARTITION BY clause : Notice when the partition changes from Female to Male Rank is reset to 1 SELECT Name, Salary, Gender, RANK() OVER (PARTITION BY Gender ORDER BY Salary DESC) AS [Rank], DENSE_RANK() OVER (PARTITION BY Gender ORDER BY Salary DESC) AS DenseRank FROM Employees Use case for RANK and DENSE_RANK functions : Both these functions can be used to find Nth highest salary. However, which function to use depends on what you want to do when there is a tie. Let me explain with an example. If there are 2 employees with the FIRST highest salary, there are 2 different business cases 1. If your business case is, not to produce any result for the SECOND highest salary, then use RANK function 2. If your business case is to return the next Salary after the tied rows as the SECOND highest Salary, then use DENSE_RANK function Since we have 2 Employees with the FIRST highest salary. Rank() function will not return any rows for the SECOND highest Salary. WITH Result AS ( SELECT Salary, RANK() OVER (ORDER BY Salary DESC) AS Salary_Rank FROM Employees ) SELECT TOP 1 Salary FROM Result WHERE Salary_Rank = 2 Though we have 2 Employees with the FIRST highest salary. Dense_Rank() function returns, the next Salary after the tied rows as the SECOND highest Salary WITH Result AS ( SELECT Salary, DENSE_RANK() OVER (ORDER BY Salary DESC) AS Salary_Rank FROM Employees ) SELECT TOP 1 Salary FROM Result WHERE Salary_Rank = 2 You can also use RANK and DENSE_RANK functions to find the Nth highest Salary among Male or Female employee groups. The following query finds the 3rd highest salary amount paid among the Female employees group WITH Result AS ( SELECT Salary, Gender, DENSE_RANK() OVER (PARTITION BY Gender ORDER BY Salary DESC) AS Salary_Rank FROM Employees ) SELECT TOP 1 Salary FROM Result WHERE Salary_Rank = 3 AND Gender = 'Female' Text version of the video http://csharp-video-tutorials.blogspot.com/2015/10/rank-and-denserank-in-sql-server.html Slides http://csharp-video-tutorials.blogspot.com/2015/10/rank-and-denserank-in-sql-server_1.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 84051 kudvenkat
What is bootstrap
 
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twitter bootstrap tutorial for beginners twitter bootstrap for beginners benefits of bootstrap framework advantages of bootstrap framework twitter bootstrap benefits what is responsive web design what is responsive website what is responsive design use of bootstrap responsive web development responsive web app In this video we will discuss 1. What is bootstrap 2. Advantages of using bootstrap Bootstrap is a free, open-source and is the most popular HTML, CSS, and JavaScript framework developed by twitter for creating responsive web applications. It includes HTML and CSS based design templates for common user interface components like Buttons, Dropdowns, Typography, Tabs, Forms, Tables, Navigations, Alerts, Modals, Accordion, Carousel etc. along with optional JavaScript extensions. Bootstrap framework is based on open standards - HTML, CSS and JavaScript. This means bootstrap can be used with any server side technology and any platform. You can use it with any web application built with any server side technology like ASP.NET, JAVA, PHP etc. What are the advantages of using bootstrap Supports responsive design : One of the greatest advantages of using bootstrap is that it helps us create responsive web applications faster and easier. So the obvious question that comes to our mind is, what is a responsive web application? A responsive web application automatically adapts to different screen sizes (i.e desktop computers, laptops, tablets. mobile phones etc). A responsive application provides optimal viewing and interaction experience i.e easy reading and navigation with a minimum of resizing, panning, and scrolling across a wide range of devices. So you don't have to worry about your application not being compatible with multiple devices. The images at the following links shows how a responsive and non-responsive application looks like on a mobile device. http://www.webnersolutions.com/wp-content/uploads/2015/08/responsive-vs-non-responsive-web-design1.jpg At the following link is a live responsive application example. Notice as we resize the browser, the content automatically adpats to the screen size. http://bootstrapdocs.com/v3.0.3/docs/examples/jumbotron/ Saves lot of development time : One of the biggest advantages of using Bootstrap is that it saves lot of development time. Instead of writing code from the scratch, bootstrap offers ready made blocks of code that you can use and customize to suit your application requirements. There are also many websites out there that offer free and paid Bootstrap themes that saves even more development time. Consistency : Bootstrap was developed by Twitter to encourage consistency across thier internal tools by giving their developers a centralised development code. Since all the developers are working using a centralised code, the end result is consistent regardless of who’s working on the project and which web browser is being used. Customizable : If you are using only a few features of bootstrap, you can customize to download only those features using the following bootstrap customize page. http://getbootstrap.com/customize/ Support : As Bootstrap is the most popular framework, it has a very large community base and excellent documentation. Bootstrap's excellent documentation, examples and demos helps a developer learn bootstrap quickly even if you are new to it. If you ever run into an issue you will usually get help quickly and easily from the vast online community and web forums. In our next video we will discuss, downloading, setting up and understanding different bootstrap components. Please stay tuned. Link for all dot net and sql server video tutorial playlists https://www.youtube.com/user/kudvenkat/playlists?sort=dd&view=1 Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2016/05/what-is-bootstrap.html
Views: 586405 kudvenkat
Transactions in sql server and ACID Tests   Part 58
 
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In this video we will learn about Transaction ACID tests. A successful transaction must pass the "ACID" test, that is a transaction must be Atomic, Consistent, Isolated and Durable. Text version of the video http://csharp-video-tutorials.blogspot.com/2012/10/transaction-acid-tests-part-58.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-58-transaction-acid-test.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 117316 kudvenkat
html attribute vs dom property
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2017/06/html-attribute-vs-dom-property.html Slides http://csharp-video-tutorials.blogspot.com/2017/06/html-attribute-vs-dom-property_20.html Angular 2 Tutorial playlist https://www.youtube.com/playlist?list=PL6n9fhu94yhWqGD8BuKuX-VTKqlNBj-m6 Angular 2 Text articles and slides http://csharp-video-tutorials.blogspot.com/2017/06/angular-2-tutorial-for-beginners_12.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss the difference between HTML attribute and DOM property. What is DOM DOM stands for Document Object Model. When a browser loads a web page, the browser creates a Document Object Model of that page. In simple terms you can think of the DOM as an application programming interface (API) for HTML, and we can use programming languages like JavaScript, or JavaScript frameworks like Angular to access and manipulate the HTML using their corresponding DOM objects. In other words DOM contains the HTML elements as objects, their properties, methods and events and it is a standard for accessing, modifying, adding or deleting HTML elements. In the previous 2 videos we discussed interpolation and property binding in Angular. Interpolation example [button disabled='{{isDisabled}}']Click Me[/button] Property binding example [button [disabled]='isDisabled']Click Me[/button] If you notice the above 2 examples, it looks like we are binding to the Button's disabled attribute. This is not true. We are actually binding to the disabled property of the button object. Angular data-binding is all about binding to DOM object properties and not HTML element attributes. What is the difference between HTML element attribute and DOM property Attributes are defined by HTML, where as properties are defined by the DOM. Attributes initialize DOM properties. Once the initialization complete, the attributes job is done. Property values can change, where as attribute values can't. Let's prove this point - Property values change, but the attribute values don't with an example. In the example below, we have set the value attribute of the input element to Tom. [input id='inputId' type='text' value='Tom'] At this point, run the web page and in the textbox you will see 'Tom' as the value. Launch the browser developer tools. On the 'Console' tab, use the getattribute() method and value property of the input element to get the attribute and property values. Notice at the moment both have the value 'Tom' Change the value in the textbox to Mary. Notice now, when we query for the attribute and property values, the attribute value is still Tom but the property value is Mary. So this proves the point - Property values change, where as attribute values don't. So it is important to keep in mind that, HTML attributes and the DOM properties are different things. Angular binding works with properties and events, and not attributes. The role of attributes is to initialize element properties and their job is done.
Views: 116211 kudvenkat
Difference between AngularJS, Angular 2 and Angular 4
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2017/09/difference-between-angularjs-angular-2.html Slides http://csharp-video-tutorials.blogspot.com/2017/09/difference-between-angularjs-angular-2_13.html Angular 2 Tutorial playlist https://www.youtube.com/playlist?list=PL6n9fhu94yhWqGD8BuKuX-VTKqlNBj-m6 Angular 2 Text articles and slides http://csharp-video-tutorials.blogspot.com/2017/06/angular-2-tutorial-for-beginners_12.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists So far Google has released 3 versions of Angular Version Year ------------ ------ AngularJS 2010 Angular 2 2016 Angular 4 2017 What is the difference between AngularJS and Angular 2 The first version of Angular is called AngularJS and was released in the year 2010. Some people call it Angular 1, but it is officially called AngularJS. Angular 2 is released in the year 2016. The most important thing to keep in mind is that, Angular 2 is not a simple upgrade from angular 1. Angular 2 is completely rewritten from the ground up and as a result the way we write applications with AngularJS and Angular 2 is very different. From a performance standpoint, Angular 2 is 5 times faster compared to AngularJS. AngularJS was not built for mobile devices, where as Angular 2 on the other hand is designed from the ground up with mobile support in mind. With Angular 2 we have more language choices. In additon to nativa JavaScript we can use TypeScript, Dart, PureScript, Elm, etc. Angular 4 is released in 2017. So, What is the difference between Angular 2 and Angular 4 If you have worked with both Angular 1 and Angular 2, then you already know that the API's and patterns that we use to build applications are very different between these 2 versions. From a developer stand point, it is like learning 2 different frameworks. Since Angular 2 is a complete rewrite from Angular 1, moving from Angular 1 to Angular 2 is a total breaking change. However, changing from Angular 2 to Angular 4 and even future versions of Angular, won’t be like changing from Angular 1. It won’t be a complete rewrite, it will simply be a change in some core libraries. From a developer standpoint, building an application using Angular 2 and Angular 4 is not very different. We still use the same concepts and patterns. Angular 4 is simply, the next version of Angular 2. The underlying concepts are still the same and if you have already learnt Angular 2 then you’re well prepared to switch to Angular 4. The most important point to keep in mind is, Angular 4 is backwards compatible with Angular 2 for most applications. What has changed and what is new in Angular 4 Some under the hood changes to reduce the size of the AOT (Ahead-of-Time) compiler generated code. Migrating to Angular 4 may reduce the production bundles by hundreds of kilobytes. As a developer this change will not affect the way we write angular applications in any way. TypeScript 2.1 and 2.2 compatibility. Angular is updated with a more recent version of TypeScript, for better type checking throughout our application. Up until Angular 4, only TypeScript 1.8 was supported. With Angular 4, we can use typescript 2.1 or 2.2 which means we can use all the new features of TypeScript with Angular 4. Animation features are pulled out of @angular/core and are moved into their own package. This means that if you don’t use animations, this extra code will not end up in your production bundles. On the other hand, if you do have animations in your application, you may have to change your existing code to pull the animation features from the animations package. We can now use an if/else style syntax with *ngIf structural directive. In Angular 2, to implement if/else logic, we use 2 *ngIf structural directives. With Angular 4, we can use it's new if/else style syntax with *ngIf structural directive. We will discuss an example of this in our upcoming videos. What happened to Angular 3. Why did we move straight from Angular 2 to Angular 4. What is the reason for skipping Angular 3. Except the Router library, all the other Angular core libraries are versioned the same way and are shipped as NPM packages as you can see below. While all the other core angular packages are at Version 2, the router library is already at Version 3. Due to this misalignment of the router package’s version, the angular team decided to go straight for Angular v4. This way, all the core packages are aligned which will be easier to maintain and help avoid confusion in the future. Common Questions Do I have to learn AngularJS 1 before learning Angular 2 Do I have to learn Angular 2 before learning Angular 4
Views: 92249 kudvenkat
Prototype in JavaScript
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2015/02/prototype-in-javascript.html In this video we will discuss Prototype object in JavaScript. Let us understand it's use with an example. The following Employee constructor function constructs Employee object. function Employee(name) { this.name = name; } There are several ways to add a function to the Employee object. One way is as shown below. This works but the problem with this approach is that, if you create 100 employee objects there will be 100 copies of getName() function. We don't want to be creating copies of functions, instead we want all the objects to share the same function code. This can be achieved using JavaScript prototype object. function Employee(name) { this.name = name; this.getName = function () { return this.name; } } var e1 = new Employee("Mark"); var e2 = new Employee("Sara"); document.write("e1.name = " + e1.getName() + "[br/]"); document.write("e2.name = " + e2.getName() + "[br/]"); Output : e1.name = Mark e2.name = Sara In this example, getName() function is added just to e1 object, and not to e2 object. So e2.getName() would throw an undefined error. function Employee(name) { this.name = name; } var e1 = new Employee("Mark"); e1.getName = function () { return this.name; } var e2 = new Employee("Sara"); document.write("e1.name = " + e1.getName() + "[br/]"); document.write("e2.name = " + e2.getName() + "[br/]"); In the following example getName() function is added to the Employee object using the name of the constructor function. This would also result in undefined error. function Employee(name) { this.name = name; } Employee.getName = function () { return this.name; } var e1 = new Employee("Mark"); var e2 = new Employee("Sara"); document.write("e1.name = " + e1.getName() + "[br/]"); document.write("e2.name = " + e2.getName() + "[br/]"); Using the prototype object to add functions : The following are the advantages of using the prototype object to add functions. 1. No matter how many objects you create, functions are loaded only once into memory 2. Allows you to override functions if required. function Employee(name) { this.name = name; } Employee.prototype.getName = function () { return this.name; } var e1 = new Employee("Mark"); var e2 = new Employee("Sara"); document.write("e1.name = " + e1.getName() + "[br/]"); document.write("e2.name = " + e2.getName() + "[br/]"); Output : e1.name = Mark e2.name = Sara
Views: 81926 kudvenkat
Pivot in sql server 2008   Part 54
 
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In this video we will learn about pivot operator. Pivot is a sql server operator that can be used to turn unique values from one column, into multiple columns in the output, there by effectively rotating a table. Text version of the video http://csharp-video-tutorials.blogspot.com/2012/10/pivot-operator-in-sql-server-part-54.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-54-pivot-in-sql-server-2008.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 197398 kudvenkat
Part 38 - C# Tutorial - Delegates usage in c# continued.avi
 
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In this part we will learn replacing hard coded logic using delegates Text version of the video http://csharp-video-tutorials.blogspot.com/2012/06/part-38-c-tutorial-delegates-example-ii.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-38-delegates-usage-in-c-ii.html All C# Text Articles http://csharp-video-tutorials.blogspot.co.uk/p/free-c-video-tutorial-for-beginners.html All C# Slides http://csharp-video-tutorials.blogspot.com/p/c.html Complete C# tutorial https://www.youtube.com/playlist?list=PLAC325451207E3105 All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 281272 kudvenkat
Part 60 C# Tutorial Difference between String and StringBuilder
 
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Tags string stringbuilder performance system.text.stringbuilder performance advantage of using system.text.stringbuilder over system.string stringbuilder namespace in c# stringbuilder append method c# stringbuilder append function convert stringbuilder object to string when to use stringbuilder over string stringbuilder vs string concatenation c# performance c# string concatenation best practice c# stringbuilder vs string concatenation string manipulation c# In this video we will understand the difference between System.String and System.Text.StringBuilder classes. We will also understand the difference between the terms mutable and immutable strings. C#, SQL Server, WCF, MVC and ASP .NET video tutorials for beginners https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd My Blog: www.csharp-video-tutorials.blogspot.com
Views: 115939 kudvenkat
Union and union all in sql server   Part 17
 
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In this video we will learn about the 1. Purpose of UNION and UNION ALL 2. Difference between UNION and UNION ALL 3. Difference between JOIN and UNION Text version of the video http://csharp-video-tutorials.blogspot.com/2012/08/union-and-union-all-in-sql-server-part.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-17-union-and-union-all.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
Views: 275682 kudvenkat
Installing aspnet mvc - Part 1
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2013/04/installing-aspnet-mvc-part-1.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-1-installing-aspnet-mvc.html All ASP .NET MVC Text Articles http://csharp-video-tutorials.blogspot.com/p/aspnet-mvc-tutorial-for-beginners.html All ASP .NET MVC Slides http://csharp-video-tutorials.blogspot.com/p/aspnet-mvc-slides.html ASP.NET MVC Playlist https://www.youtube.com/playlist?list=PL4cyC4G0M1RQAV0xCaEjfwAeaFaUuHXuf All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this video we will discuss about installing asp.net mvc. Before installing asp.net mvc, first let's determine what version is already installed. Go to "Control Panel" and click on "Programs and Features". If you want to create asp.net mvc 3 or 4 applications, then please download and install asp.net mvc 3 and 4 from the following locations. ASP.NET MVC 3 http://www.asp.net/mvc/mvc3 ASP.NET MVC 4 http://www.asp.net/mvc/mvc4 When you create a new project, make sure you have .NET Framework 4 selected in the drop down list. If you have any other earlier .net framework versions selected, then ASP.NET MVC 3 Web Application and ASP.NET MVC 4 Web Application templates will not be available.
Views: 1606494 kudvenkat
Lazy loading in angular
 
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In this video we will discuss lazy loading angular modules Text version of the video https://csharp-video-tutorials.blogspot.com/2018/12/lazy-loading-in-angular.html Slides https://csharp-video-tutorials.blogspot.com/2018/12/lazy-loading-in-angular-slides.html Angular 6 Tutorial https://www.youtube.com/playlist?list=PL6n9fhu94yhWNJaDgh0mfae_9xoQ4E_Zj Angular 6 Tutorial Text Articles & Slides http://csharp-video-tutorials.blogspot.com/2018/09/angular-6-tutorial-for-beginners.html Angular, JavaScript, jQuery, Dot Net & SQL Playlists https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd
Views: 19481 kudvenkat
Part 1   How to find nth highest salary in sql
 
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Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists Link for slides, code samples and text version of the video http://csharp-video-tutorials.blogspot.com/2014/05/part-1-how-to-find-nth-highest-salary_17.html This is a very common SQL Server Interview Question. There are several ways of finding the nth highest salary. By the end of this video, we will be able to answer all the following questions as well. How to find nth highest salary in SQL Server using a Sub-Query How to find nth highest salary in SQL Server using a CTE How to find the 2nd, 3rd or 15th highest salary Let's use the following Employees table for this demo Use the following script to create Employees table Create table Employees ( ID int primary key identity, FirstName nvarchar(50), LastName nvarchar(50), Gender nvarchar(50), Salary int ) GO Insert into Employees values ('Ben', 'Hoskins', 'Male', 70000) Insert into Employees values ('Mark', 'Hastings', 'Male', 60000) Insert into Employees values ('Steve', 'Pound', 'Male', 45000) Insert into Employees values ('Ben', 'Hoskins', 'Male', 70000) Insert into Employees values ('Philip', 'Hastings', 'Male', 45000) Insert into Employees values ('Mary', 'Lambeth', 'Female', 30000) Insert into Employees values ('Valarie', 'Vikings', 'Female', 35000) Insert into Employees values ('John', 'Stanmore', 'Male', 80000) GO To find the highest salary it is straight forward. We can simply use the Max() function as shown below. Select Max(Salary) from Employees To get the second highest salary use a sub query along with Max() function as shown below. Select Max(Salary) from Employees where Salary [ (Select Max(Salary) from Employees) To find nth highest salary using Sub-Query SELECT TOP 1 SALARY FROM ( SELECT DISTINCT TOP N SALARY FROM EMPLOYEES ORDER BY SALARY DESC ) RESULT ORDER BY SALARY To find nth highest salary using CTE WITH RESULT AS ( SELECT SALARY, DENSE_RANK() OVER (ORDER BY SALARY DESC) AS DENSERANK FROM EMPLOYEES ) SELECT TOP 1 SALARY FROM RESULT WHERE DENSERANK = N To find 2nd highest salary we can use any of the above queries. Simple replace N with 2. Similarly, to find 3rd highest salary, simple replace N with 3. Please Note: On many of the websites, you may have seen that, the following query can be used to get the nth highest salary. The below query will only work if there are no duplicates. WITH RESULT AS ( SELECT SALARY, ROW_NUMBER() OVER (ORDER BY SALARY DESC) AS ROWNUMBER FROM EMPLOYEES ) SELECT SALARY FROM RESULT WHERE ROWNUMBER = 3
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Indexed views in sql server   Part 41
 
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In this video we will learn about, creating indexed views. A unique clustered index, is the first index that should be created on a view. Indexed views are also called as materialized views Text version of the video http://csharp-video-tutorials.blogspot.com/2012/09/indexed-views-in-sql-server-part-41.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-41-indexed-views.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
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Self join in sql server - Part 14
 
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In this video we will learn about 1. Self Join - Joining a table with itself 2. Self Join is not a different type of join. It can be classified as Inner Self Join, Outer Self Join (Left, Right and Full), or Cross Self Join. Text version of the video http://csharp-video-tutorials.blogspot.com/2012/08/self-join-in-sql-server-part-14.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-14-self-join.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
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Async and await in C# example
 
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In this video we will discuss async and await keywords and their use with an example. Text version of the video http://csharp-video-tutorials.blogspot.com/2016/10/async-and-await-in-c-example.html Slides http://csharp-video-tutorials.blogspot.com/2016/10/async-and-await-in-c-example_31.html All C# Text Articles http://csharp-video-tutorials.blogspot.com/p/free-c-video-tutorial-for-beginners.html All C# Slides http://csharp-video-tutorials.blogspot.com/p/c.html All C# Videos https://www.youtube.com/playlist?list=PLAC325451207E3105 All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
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Stored procedures in sql server   Part 18
 
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In this video we will learn 1. What is a stored procedure 2. Stored Procedure example 3. Creating a stored procedure with parameters 4. Altering SP 5. Viewing the text of the SP 6. Dropping the SP 7. Encrypting stored procedure Text version of the video http://csharp-video-tutorials.blogspot.com/2012/08/stored-procedures-part-18.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-18-stored-procedures.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
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Angular reactive forms
 
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In this video we will discuss reactive forms in Angular. There are 2 ways to create forms in Angular 1. Template Driven Forms 2. Reactive Forms (Also called Model Driven Forms) Here is the link to Angular CRUD playlist. We discussed Template forms in Part 5. https://www.youtube.com/playlist?list=PL6n9fhu94yhXwcl3a6rIfAI7QmGYIkfK5 Text version of the video http://csharp-video-tutorials.blogspot.com/2018/09/angular-reactive-forms.html Slides http://csharp-video-tutorials.blogspot.com/2018/09/angular-reactive-forms-slides.html Angular 6 Tutorial https://www.youtube.com/playlist?list=PL6n9fhu94yhWNJaDgh0mfae_9xoQ4E_Zj Angular 6 Tutorial Text Articles & Slides http://csharp-video-tutorials.blogspot.com/2018/09/angular-6-tutorial-for-beginners.html Angular, JavaScript, jQuery, Dot Net & SQL Playlists https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd As the name implies, Template Driven Forms are heavy on the template meaning we create the form completely in HTML. Template driven forms are easy to build and understand. They are great for creating simple forms. However, creating complex forms using template driven approach is not recomended as the HTML can get very complicated and messy. It is not easy to unit test template forms as the logic is in the HTML. Reactive forms on the other hand allow us to build the form completely in code. This is more flexible and has many benefits over template forms. For example, it is easy to add form input elements dynamically and adjust validation at runtime based on the decisions made in code. It is also easy to unit test as most of the logic and validation is in the component class. The only downside of reactive forms is that they require more code than template forms. In this video and in our upcoming videos we will discuss everything we need to know to build complex reactive forms. With a reactive form, we create the entire form control tree in the component class code. Let us understand this by creating a simple form with just 2 form controls as shown below.
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Views in sql server   Part 39
 
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In this video we will learn about 1. What is a view 2. Creating example views 3. Advantages of using views Text version of the video http://csharp-video-tutorials.blogspot.com/2012/09/views-in-sql-server-part-39.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-39-views-in-sql-server.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
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Part 26   What is a windows service
 
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Link for code samples used in the demo http://csharp-video-tutorials.blogspot.com/2014/02/part-26-what-is-windows-service_8.html Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists In this video, we will discuss 1. What is a windows service and how do they differe from regular applications and programs 2. How to view all the services installed on a windows machine 3. What is the use of windows services 4. When would an asp.net developer use a windows service What is a windows service and how do they differ from regular applications and programs A windows service is similar to any other program or application running on a windows machine. The following are the differences between a windows service and a regular application 1. Windows service runs in the background 2. They can be configured to start automatically when the system starts 3. They don't have user interface. How to view all the services installed on a windows machine 1. Open run windows by pressing Windows + R key 2. Type services.msc and press enter 3. The services window should display all the services installed on your computer What is the use of windows services Windows services provide core operating system features such as Event Logging - Windows Event Log Service Providing Security - Windows Firewall Service Error reporting - Windows Error Reporting Service When would an asp.net developer use a windows service In general, we should create a Windows Service to run code in the background all the time, without any sort of user interaction. An asp.net developer can use a windows service to host a wcf service. We can then configure the windows service to start automatically when the computer starts. This makes our WCF service always available for clients to consume, even if no-one is logged on, on that computer. In our next video, we will discuss, creating a windows service to host a WCF service
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Part 36   Instancing modes in WCF
 
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Link for code samples used in the demo http://csharp-video-tutorials.blogspot.com/2014/02/part-36-instancing-modes-in-wcf_25.html Link for all dot net and sql server video tutorial playlists http://www.youtube.com/user/kudvenkat/playlists In this video we will discuss, different instancing modes available in WCF. Instancing modes are also called as instance context modes. Instance context mode dictates, how long the service instance remains on the server. There are 3 instancing modes 1. PerCall - A new instance of service object is created for every request, irrespective of whether the request comes from the same client or a different client. 2. PerSession - A new instance of the service object is created for each new client session and maintained for the duration of that session. 3. Single - A single instance of the service object is created and handles all requests for the lifetime of the application, irrespective of whether the request comes from the same client or a different client. How do you specify what instancing mode you want to use? Use ServiceBehavior attribute and specify InstanceContextMode. In our next video, we will discuss each instancing option and their implications with an example.
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Temporary tables in SQL Server   Part 34
 
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In this video we will learn about 1. What are temporary tables 2. The 2 different types of temporary tables -- Local Temporary Tables and Global Temporary tables 3. Difference between local and global temp tables Text version of the video http://csharp-video-tutorials.blogspot.com/2012/09/temporary-tables-in-sql-server-part-34.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-34-temporary-tables.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
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FromBody and FromUri in Web API
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2016/09/frombody-and-fromuri-in-web-api.html Slides http://csharp-video-tutorials.blogspot.com/2016/09/frombody-and-fromuri-in-web-api_19.html All ASP.NET Web API Text Articles and Slides http://csharp-video-tutorials.blogspot.com/2016/09/aspnet-web-api-tutorial-for-beginners.html All ASP.NET Web API Videos https://www.youtube.com/playlist?list=PL6n9fhu94yhW7yoUOGNOfHurUE6bpOO2b All Dot Net and SQL Server Playlists https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd
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Part 22 - C# Tutorial - Method hiding in c#.avi
 
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Text version of the video http://csharp-video-tutorials.blogspot.com/2012/06/part-22-c-tutorial-method-hiding-in-c.html Slides http://csharp-video-tutorials.blogspot.com/2013/08/part-22-method-hiding-in-c.html All C# Text Articles http://csharp-video-tutorials.blogspot.co.uk/p/free-c-video-tutorial-for-beginners.html All C# Slides http://csharp-video-tutorials.blogspot.com/p/c.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists In this part of the c sharp tutorial we will learn 1. Method hiding 2. Invoke hidden base class members
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CTE in sql server   Part 49
 
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In this video we will learn about creating and referencing CTE's in SQL server. We will also learn how to create multiple CTE's using a single WITH clause. Text version of the video http://csharp-video-tutorials.blogspot.com/2012/09/common-table-expressions-part-49.html Slides http://csharp-video-tutorials.blogspot.com/2013/09/part-49-cte.html All SQL Server Text Articles http://csharp-video-tutorials.blogspot.com/p/free-sql-server-video-tutorials-for.html All SQL Server Slides http://csharp-video-tutorials.blogspot.com/p/sql-server.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
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Deploy angular app to IIS
 
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In this video we will discuss deploying angular application to IIS. Here are the steps Step 1 : Build your angular application. If you want to deploy a development build do a development build using the following Angular CLI command. The base-href option on the build command sets the base-href element in index.html to "/ePortal/" instaed of "/". In the IIS server, we will create an application with name "ePortal" in just a bit. ng build --base-href /ePortal/ If you want to deploy a production build do a production build using the following Angular CLI command. ng build --prod --base-href /ePortal/ In our case let's deploy a production build. After the build is complete, you will notice a folder with name "dist" in your Angular project folder. This folder contains all the build files. These build files need to be copied to a folder on the server where we have IIS installed. Step 2 : Create a folder on the server where you have IIS installed. You can name the folder anything you want. I am going to name the folder "ProductionBuild" and I am creating it in C:\ drive. Step 3 : Now copy all the contents of the "dist" folder into "ProductionBuild" folder Step 4 : Open IIS. There are several ways to do this. One way is to type "inetmgr" in the "Run" window and click "OK" Step 5 : Create an application in IIS. Name it "ePortal". This name has to match the value we have specified for the --base-href option in Step 1. a) Exapand the root IIS node b) Expand Sites c) Right click on "Default Web Site" and select "Add Application" from the context menu d) In the "Alias" textbox, type "ePortal" e) Set the "Physical Path" to folder that contains the build files. In our case it is "ProductionBuild" folder in C:\ drive At this point, if you launch the browser and navigate to http://localhost/ePortal/home, you will see the "home works" message as expected. When you click on the "Employees" tab it also works as expected. However, when you "Refresh" the page by pressing F5, you will see HTTP 404 error Step 6 : To fix this Page Refresh issue in Angular, include the following URL rewrite rule in you web.config file. This web.config file should be in copied the "ProductionBuild" folder where we have the rest of the build files. Please replace [ with LESS_THAN symbol and ] with GREATER_THAN symbol. [?xml version="1.0" encoding="utf-8"?] [configuration] [system.webServer] [rewrite] [rules] [rule name="AngularJS Routes" stopProcessing="true"] [match url=".*" /] [conditions logicalGrouping="MatchAll"] [add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" /] [add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" /] [add input="{REQUEST_URI}" pattern="^/(api)" negate="true" /] [/conditions] [action type="Rewrite" url="/ePortal" /] [/rule] [/rules] [/rewrite] [/system.webServer] [/configuration] Please note : You may also point the IIS application directly to the "dist" folder in RoutingDemo project folder. The downside of this is every time you rebuild your application, the "dist" folder is deleted and recreated. This means you will loose the web.config file and you have to create it again. Text version of the video http://csharp-video-tutorials.blogspot.com/2017/11/deploy-angular-app-to-iis.html Slides http://csharp-video-tutorials.blogspot.com/2017/11/deploy-angular-app-to-iis-slides.html Angular CLI Tutorial https://www.youtube.com/watch?v=rJ9o4TyhSuo&list=PL6n9fhu94yhWUcq5Pc16uf8YKXoZ87Vh_ Angular CLI Text articles & Slides http://csharp-video-tutorials.blogspot.com/2017/10/angular-cli-tutorial-for-beginners.html All Dot Net and SQL Server Tutorials in English https://www.youtube.com/user/kudvenkat/playlists?view=1&sort=dd All Dot Net and SQL Server Tutorials in Arabic https://www.youtube.com/c/KudvenkatArabic/playlists
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