Create your webservice. I added mine in a sub directory of my site named Services. So when looking into the code behind of the webservice you will see something like: namespace MyNamespace.Services you want to remember this. Next thing is to add: using System.Web.Script.Services; with the rest of the includes and also add the line: [ScriptService] just before the public class MyService : System.Web.Services.WebService

Next is to go to the aspx page and create the proxy.

<asp:scriptmanagerproxy id="“ScriptManagerProxy”" runat="“server”">
<services>
<asp:servicereference path="“~/Services/MyService.asmx”"></asp:servicereference>
</services>
</asp:scriptmanagerproxy>

Next comes the javascript

<script language="“javascript”" type="“text/javascript”">
function ButtonClick() { MyNamespace.Services.MyService.MyFunction(OnComplete) }
function OnComplete(results) { alert (results) }
</script>

Notice the “MyNamespace.Services.” before the name of the webservice. This is important to add when using a web application project, it is not need when making a regular web site because a web site does not use namespaces. So there you go, you should now be able to get things up and running.