What is AJAX and Why we need AJAX in ASP.Net?

[aqualityseo]

What is AJAX and Why we need AJAX in ASP.Net?

[delois]

Ajax is technique with use of which we can do and execute operation without posting back or sending request to server which cause page refresh. Retrieving value from database, validating client input, making calculation on certain data and updating database,all these tasks require posting request back to server and with use of Ajax you can establish back hand connection to server or perform calculation on page without making any request.

[lucasyesher]

Originally Posted by delois

Ajax is technique with use of which we can do and execute operation without posting back or sending request to server which cause page refresh. Retrieving value from database, validating client input, making calculation on certain data and updating database,all these tasks require posting request back to server and with use of Ajax you can establish back hand connection to server or perform calculation on page without making any request.

That's quite amazing information. It is very helpful to decreases the server request and server can handle more request on client response. So it will work as fast as. I have use these AJAX into my application to robust program to work as fast as they can.

[Smohil]

Ajax is used to create Asynchronous web application.Asynchronous means calls only one function without refreshing whole page.Ajax helps to polish a web page .We use Ajax controls in .NET.

[christajoe]

AJAX, expanded as Asynchronous JavaScript and XML, is a web-development technique executed at the client side to continuously exchange data with server without interfering the display of the screen.
The need arises due to the reason that web-development is more live these days and web-sites are now used more than to display the text but to perform some tasks using functions.
So, whenever, users passes arguments to the web-server, it needs to refresh the screen to get the output screen, but with AJAX introduced, the part of the page is implicitly refreshed without asking the user's command.
Example can be seen on e-Commerce web-sites, where user selects the range of price and the list of the product automatically refresh and only those products are displayed which follow the trend provided by the user.