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Question

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

Answer 1

A:

I tweaked your code a bit. I added the server side output of the ClientID to the updateRegions method to pass it in. And I changed your getJSON method to pass in the url with a query string parameter (instead of separate data) and the call back function.

jQuery(document).ready(function() {
   jQuery("#<%= AreaListBox.ClientID %>").click(function() {
       updateRegions(<%= AreaListBox.ClientID %>);
   });
});

function updateRegions(areaId) {
    jQuery("h2").html("AreaId:" + areaId);

    jQuery.getJSON("/Locations.aspx/GetRegions?" + areaId, 
        function (data, textStatus) {
            debugger;
        });
}

Let me know if that works!

Andrew Siemer 2009-07-24 09:42:56

Answer 2

+2 A:

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

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

<script runat="server">
    [WebMethod]
    public static string GetRegions(int areaId)
    {
        return "Foo " + areaId;
    }
</script>

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml"&gt;
<head runat="server">
    <title>jQuery and page methods</title>
    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.3.2/jquery.min.js"&gt;&lt;/script&gt;
</head>
<body>
    <script type="text/javascript">
    $(function() {
        var areaId = 42;
        $.ajax({
            type: "POST",
            url: "Default.aspx/GetRegions",
            data: "{areaId:" + areaId + "}",
            contentType: "application/json; charset=utf-8",
            dataType: "json",
            success: function(data) {
               alert(data.d);
           }
        });
    });
    </script>
</body>
</html>

korchev 2009-07-27 19:43:30

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

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