Calling ASP.Net Code Behind using jQuery AJAX

With the help of the $.ajax() we can able to call the web method which is defined in the C# class . From the following example, the $.ajax() function will make asynchronous HTTP(Ajax) request to the web method called as getOutput(). jQuery Source Code
<script> $(document).ready(function () { $.ajax({ type: "POST", url: "jQueryCall.aspx/getOutput", contentType: "application/json; charset=utf-8", dataType: "json", success: function (response) { $("#Content").text(response.d); }, failure: function (response) { alert(response.d); } }); }); </script>
Here we are specifying success: and failure: to show the kind of return data format we are expecting from the web method.

success: function (response)

On successful execution of the requested web method the ajax function will call the method to process the output.

Failure:Function(responce)

Failure method gets executed when there is some exception happens on web method execution.

C# Source Code
using System.Web.Services; namespace WebApplication { public partial class jQueryCall : System.Web.UI.Page { protected void Page_Load(object sender, EventArgs e) { } [WebMethod] public static string getOutput() { return "This is from C# code behind!!"; } } }
It is important to note that, when we call a C# function in code-behind , the function must be defined as a static function, otherwise the ajax function cannot call it.




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