Here Mudassar Ahmed Khan has explained with an example, how to use Ajax.BeginForm extension method in ASP.Net MVC Razor.

In order to make use of the Ajax.BeginForm extension method used to make AJAX calls, some configuration needs to be done in the ASP.Net MVC application project.

Here Mudassar Ahmed Khan has explained with an example, how to render (return) Partial View as JSON using JsonResult function from Controller in ASP.Net MVC Razor.

The Partial View will be populated from database using Entity Framework, converted to a HTML string and then returned as JSON from Controller to the jQuery AJAX function using JsonResult function in ASP.Net MVC Razor.

Here Mudassar Ahmed Khan has explained with an example, how to render Partial View inside DIV using AJAX in ASP.Net MVC Razor.

The Partial View will be populated and fetched using AJAX and finally it will be rendered as HTML inside DIV using jQuery in ASP.Net MVC Razor.

Here Mudassar Ahmed Khan has explained with an example, how to post JSON data to REST WCF Service (SVC) using jQuery AJAX in ASP.Net using C# and VB.Net.
This article also explains how to modify the WCF Service (SVC) configuration in order to make it accessible for posting JSON data using via jQuery AJAX.