Using jQuery's getJSON method with an ASP.NET Web Form

Question

How do I go about calling a method on an ASP.NET Web Form page using the getJSON method on jQuery?

The goal is this:

1. User clicks on a list item

Answer 1

Here is a minimalistic example which should hopefully get you started:

<%@ Page Language="C#" %>
<%@ Import Namespace="System.Web.Services" %>