JQuery is not a language but it is a well written JavaScript code, As quoted on official jQuery website “it is a fast and concise JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development.“

Solution to “background images are not being change or set”

$('#div_mainimage').css('background-image', 'url(my_image.png)');

or

$('#div_mainimage').css('background', 'url(yourimagepath/my_image.png)');

For more details about the jQuery CSS Manipulation

The UpdatePanel control in Microsoft’s ASP.NET AJAX, is a good way to save some time when you have simple AJAX programming needs to post data to a form without refreshing the Web page.  The javascript  code is not working if you using the code inside update panel.  So in order to add javascript in update panel you need to register you client script to your script manager as shown below:

ScriptManager.RegisterClientScriptBlock(Page, Page.GetType(),Guid.NewGuid().ToString(),“alert(‘Hi, I am here !’);”,true);

Open a prettyPhoto

ScriptManager.RegisterClientScriptBlock(Page, Page.GetType(),Guid.NewGuid().ToString(),“$(\”a[rel^='prettyPhoto']\”).prettyPhoto({ theme: ‘facebook’ });”,true);

ADO.NET is the underlying data access API for .NET Framework (much like JDBC in Java). It’s been around since the first release of .NET.

LINQ to SQL is a data access framework built on ADO.NET and new language features that makes SQL Server data available natively in the object oriented style of programming. LINQ (Language-Integrated Query) and thus allowing to query data using programming language’s own syntax
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Linq IN query will pull back a set of results from SQL that is within a given range. This range can be set manually, or can itself be a query. So if you have an eCommerce application and you want to know what products you have in a given user’s cart

SQL

SELECT * FROM Product WHERE ProductID IN (SELECT ProductID FROM mycart)

Linq

List<int> itemQuery = new List<int>() {1,2,3,4};

var myProducts = from p in db.Products
                where itemQuery.Contains(p.ProductID)
                select p;

Linq To Sql only constructs the query when the Enumerator is tripped

This article recently which I thought was pretty cool. It describes how to build and use an ASP.NET Server Control that makes Google Map integration easy within ASP.NET applications:

Sending email in asp.net c# is one of the most common and reliable methods of communication for both personal and business purposes.

One of the big improvements in the configuration and maintenance of ASP.NET Web sites for version 2.0 is the ability to define common settings such as connection strings and mail server in a structured section of the web.config file

C#.net Coding Part

First add below mentioned namespace in code