ASP.net AJAX 调用PageMethods实例(javascript调用服务器页面方法)

1、新建网站，选择Asp.net Ajax Enabled Web Site 模板（如图）
2、 <asp:scrīptManager ID="scrīptManager1" runat="server"/>中增加 EnablePageMethods="True" ，以启用PageMethods
3、编写服务器端方法代码

[System.Web.Services.WebMethod]
public static string GetServerTime()
{
return DateTime.Now.ToString();
}

请注意：a、[System.Web.Services.WebMethod]是必须的，相当于ajax.net中的[ajax.method]，b、方法前面要上static

4、页面设计,内容如下
<div>
<input type="button" value="服务器时间" id="btnGetServerTime" ōnclick="return btnGetServerTime_onclick()" />
<span id="result" />
</div>

5、编写客户端javascrīpt
<scrīpt language="javascrīpt" type="text/javascrīpt">
// <!CDATA[

function btnGetServerTime_onclick() {
PageMethods.GetServerTime(cb_getServerTime);
}

function cb_getServerTime(result) {
document.getElementById("result").innerHTML = result;
}

6、执行程序，单击"服务器时间" 按钮就可返回服务器的时间并显示在result中。

附：

一、客户端代完整代码

<%@ Page Language="C#" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
<scrīpt language="javascrīpt" type="text/javascrīpt">
// <!CDATA[

function btnGetServerTime_onclick() {
PageMethods.GetServerTime(cb_getServerTime);
}

function cb_getServerTime(result) {
document.getElementById("result").innerHTML = result;
}

// ]]>
</scrīpt>

</head>
<body>
     <form id="form1" runat="server">
         <asp:scrīptManager ID="scrīptManager1" runat="server" EnablePageMethods="True" />
        <div>
<input type="button" value="服务器时间" id="btnGetServerTime" ōnclick="return btnGetServerTime_onclick()" />
<span id="result" />
</div>

</form>
</body>
</html>

二、服务器端完整代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

public partial class _Default : System.Web.UI.Page
{
     [System.Web.Services.WebMethod]
     public static string GetServerTime()
     {
         return DateTime.Now.ToString();
     }
}