How to Search Data In ASP.NET MVC using AJAX

AJAx is a client-side script that communicates to and from a server without interfering with the display and behaviour of the existing page.AJAx stands for Asynchronous JavaScript and XML.Ajax is not a single technology HTML and CSS can be used in combination to mark up and style information.AJAX is not a programming language but combination of A browser built-in XMLHttpRequest object ,JavaScript and HTML DOM (to display or use the data).

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Why use AJAX?
Update a web page or DIV without reloading the page.
Request data from a server and receive data from a server - after the page has loaded.
Send data to a server - in the background.
Making Asynchronous Calls.
In UI-User Friendly.
Improve the speed, performance and usability of a web application.
In Cascading dropdown and autocomplete like as google search.