1. VS 2005 – create new website with ASP.NET Ajax-Enabled Website , then create  WebService.asmx
using System;
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Script.Services;
/// <summary>
/// Summary description for WebService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService]Â // <== [System.Web.Script.Services.ScriptService]
public class WebService : System.Web.Services.WebService { public WebService () {
//Uncomment the following line if using designed components
//InitializeComponent();
}[WebMethod] public string HelloWorld() {
return “Hello World“;
}[WebMethod] public string GetDateTimeFromServer()
{
return DateTime.Now.ToString();
}
}
using System.Web;
using System.Collections;
using System.Web.Services;
using System.Web.Services.Protocols;
using System.Web.Script.Services;
/// <summary>
/// Summary description for WebService
/// </summary>
[WebService(Namespace = "http://tempuri.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
[ScriptService]Â // <== [System.Web.Script.Services.ScriptService]
public class WebService : System.Web.Services.WebService { public WebService () {
//Uncomment the following line if using designed components
//InitializeComponent();
}[WebMethod] public string HelloWorld() {
return “Hello World“;
}[WebMethod] public string GetDateTimeFromServer()
{
return DateTime.Now.ToString();
}
}
==============================================
2. Create JScript.js
// JScript File
function GetDateTimeFromServer()
{
WebService.GetDateTimeFromServer(OnSuccess, OnFail);
} function OnSuccess(e){
document.getElementById(‘LabelDateTime‘).innerHTML = e;
} function OnFail(e){
document.getElementById(‘LabelDateTime‘).innerHTML = e;
}
function GetDateTimeFromServer()
{
WebService.GetDateTimeFromServer(OnSuccess, OnFail);
} function OnSuccess(e){
document.getElementById(‘LabelDateTime‘).innerHTML = e;
} function OnFail(e){
document.getElementById(‘LabelDateTime‘).innerHTML = e;
}
=================================================
3. Create Default.aspx
<head runat=”server”>
<title>Untitled Page</title>
<script src=”JScript.js” type=”text/javascript”></script>
</head>
<body>
<form id=”form1″ runat=”server”>
<div>
<asp:ScriptManager ID=”ScriptManager1″ runat=”server”>
<Services>
<asp:ServiceReference Path=”WebService.asmx” />
</Services>
</asp:ScriptManager>
<br />
<button onclick=”GetDateTimeFromServer();”>
– Show server time –
</button>
<br />
<label id=”LabelDateTime”>
</label>
</div>
</form>
</body>
</html>
<title>Untitled Page</title>
<script src=”JScript.js” type=”text/javascript”></script>
</head>
<body>
<form id=”form1″ runat=”server”>
<div>
<asp:ScriptManager ID=”ScriptManager1″ runat=”server”>
<Services>
<asp:ServiceReference Path=”WebService.asmx” />
</Services>
</asp:ScriptManager>
<br />
<button onclick=”GetDateTimeFromServer();”>
– Show server time –
</button>
<br />
<label id=”LabelDateTime”>
</label>
</div>
</form>
</body>
</html>
===============================================