Need to call code behind method from Javascript without using ajax in asp.net

Add following HTML on page:

<asp:ScriptManager ID='ScriptManager1' runat='server' EnablePageMethods='true' />
<asp:Button ID=”btnSave” runat=”server” Text=”Save” OnClientClick=”return CodeBehindMethodCall();” />

Now time to adjust our code behind so we can call it from JavaScript, we need to use System.Web.Services so add it in our code behind file

using System.Web.Services;

Whatever method we need to call from JavaScript, add WebMethodattribute to that method and that will easily be called by javaScript

[WebMethod]
public String ConvertDataTabletoString()
{
    // your code 
}

Now we will call ConvertDataTabletoString from JavaScript, so add the following JavaScript to the page:

function CodeBehindMethodCall()
{
    pageName.ConvertDataTabletoString();
}

As you can see we have not used web service but we changed a method to web method so it can be called from JavaScript but without converting a method into web method we can not call any code behind method from JavaScript.

This is how its done.