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MS Ajax 调用 WebService 示例
Author: 无锋不起浪
1. WebServices.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="WebServices.aspx.cs" Inherits="WebServicesTest" %>

<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>AjaxWebServiceTest</title>
</head>
<body>
    <form id="form1" runat="server">
        <asp:ScriptManager ID="ScriptManager1" runat="server">
            <Services>
                <asp:ServiceReference Path="../WebService/AjaxService.asmx" />
            </Services>
        </asp:ScriptManager>
        <asp:UpdateProgress ID="UpdateProgress1" runat="server">
            <ProgressTemplate>
                <img src="../Images/loading.gif" />
                Loading
            </ProgressTemplate>
        </asp:UpdateProgress>
        <div>
            <input id="inputName" type="text" size="20" runat="server" />
            <input id="btnTest" type="button" value="调 用" onclick="return btnTest_Click()" />
        </div>
    </form>
</body>
</html>

<script type="text/javascript" language="JavaScript">
function $(s){return document.getElementById(s);}

function btnTest_Click() 
{
    var requestSimpleService = AjaxService.AjaxServiceTest(
    $('<%=inputName.ClientID %>').value,   //params
    OnRequestComplete    //Complete event
    );
    
    return false;
}

function OnRequestComplete(result)
{
    alert(result);
}
</script>

2. AjaxService.asmx
<%@ WebService
    Language="C#"
    CodeBehind="~/App_Code/WebService/AjaxService.cs"
    Class="AjaxService" %>

3. AjaxService.cs
using System;
using System.Web.Services;
using System.Web.Script.Services;//***必须

[ScriptService]
public class AjaxService : WebService
{
    public AjaxService()
    { }

    [WebMethod]
    public string AjaxServiceTest(string s)
    {
        Framework.AppException.LogFile(s);
        return "Hello " + s;
    }
}
Add by : Huobazi (2007-10-22:10:22)