Ajax error calling Web Service from Web Application Project vs Web Site

I am implementing the code from the Asp.Net Ajax Video Demo “How Do I: Make Client-Side Network Callbacks with ASP.NET AJAX?”  The Web page is generating a javascript error (‘SimpleService’ is undefined) and is unable to recognize the Web service.  The downloaded examples work, however I have created the Demo (both the page and the web service) in a Web Application Project, rather than a Web Site.  The demo uses a Web site.  Because of this the page does not recognize the Web service. 

To ask the question another way: What needs to be done differently in a Web Service in a Web Application Project (vs. a Web Site) to ensure the Service can be referenced and accessed via the pages javascript.  Or is there a reason why this cannot be done? 
 I am new to Ajax and Web services, so I apologize for my Newbie question.  Thanks in advance. (Edit: Code did not post correctly, sorry) <head runat="server">   
<title>Untitled Page</title>
<script language="javascript" type="text/javascript">
function Button1_onclick()
ret = SimpleService.SayHello(document.getElementById('Text1').value, OnComplete, OnTimeOut, OnError);   
return (true);
function OnComplete(arg) {   
function OnTimeOut(arg) {
function OnError(arg) {
// -->
    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
            <Services><asp:ServiceReference Path="SimpleService.asmx" /></Services>
            <input id="Text1" style="width: 240px" type="text" />&nbsp;
            <input id="Button1" type="button" value="Say Hello" onclick="return Button1_onclick()" />
''Web Service as created in Web Application Project (AjaxTestApp1/SimpleService.aspx.vb>
Imports System.Web.Services
Imports System.Web.Services.Protocols
Imports System.ComponentModel
<System.Web.Services.WebService(Namespace:="http://tempuri.org/")> _
<System.Web.Services.WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
<System.Web.Script.Services.ScriptService()> _<ToolboxItem(False)> _
Public Class SimpleService
    Inherits System.Web.Services.WebService   
    <WebMethod()> _
    Public Function SayHello(ByVal name As String) As String
        Return String.Format("Hello: {0}", name)
    End Function
End Class

'Web Service as created in Web Application Project (HDI-AJAX-NetworkCalls-VB/App_Code/SimpleService.aspx.vb)
Imports System.Web
Imports System.Web.Services
Imports System.Web.Services.Protocols
<WebService(Namespace:="http://tempuri.org/")> _
<WebServiceBinding(ConformsTo:=WsiProfiles.BasicProfile1_1)> _
<Global.Microsoft.VisualBasic.CompilerServices.DesignerGenerated()> _
<System.Web.Script.Services.ScriptService()> _
Public Class SimpleService
    Inherits System.Web.Services.WebService
   <WebMethod()> _
    Public Function SayHello(ByVal Name As String) As String
       Return "Hello : " + Name
    End Function
End Class


David Williams MCP
.Net Senior Developer
6/14/2007 10:17:04 PM
asp.net.networking-webservices 2181 articles. 0 followers. Follow

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It appears that I needed to reference the Web Service using the Project name in addition to the actual service name from javascript. I discovered this by looking at the Javascript as generated by the Webservice.  For example: Javascript on the aspx page was calling the service with the following:

function Button1_onclick() {
  ret = SimpleService.SayHello(document.getElementById... )

However I should have referenced the web service using

  ret = AjaxTestApp1.SimpleService.SayHello(document.getElementById... )

I discovered this by downloading and opening the the "proxy" javascript generated by the Web service through http://localhost:49646/SimpleService.asmx/js.  This file provides the reference to to the service to be called from javascript.  I was able to see I needed to include the Project name when calling the service. 

AjaxTestApp1.SimpleService.SayHello= function(name, ... )

David Williams MCP
.Net Senior Developer
6/15/2007 2:49:34 PM

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