在Ajax1.0中调用页面CS文件中的方法
环境:
windows 2003 sp2 + vs 2005 专业版 sp1 + ajax1.0 正式版
test.aspx文件代码:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>无标题页</title>
<script language="javascript" type="text/javascript">
// <!CDATA[
function Button1_onclick() {
PageMethods.GetTime( h );
return false;
}
function h( r)
{
alert( r );
}
// ]]>
</script>
</head>
<body>
<form id="form1" runat="server">
<div>
<asp:ScriptManager ID="ScriptManager1" EnablePageMethods="true" runat="server">
</asp:ScriptManager>
<input id="Button1" type="button" value="button" onclick="return Button1_onclick()" /></div>
</form>
</body>
</html>
test.cs 代码如下:
using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 test: System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
[System.Web.Services.WebMethod]
public string GetTime()
{
return DateTime.Now.ToString();
}
}
windows 2003 sp2 + vs 2005 专业版 sp1 + ajax1.0 正式版
test.aspx文件代码:
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="test.aspx.cs" Inherits="test" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml" ><head runat="server"> <title>无标题页</title><script language="javascript" type="text/javascript">// <!CDATA[function Button1_onclick() {
PageMethods.GetTime( h ); return false;}function h( r){ alert( r );}// ]]></script></head><body> <form id="form1" runat="server"> <div> <asp:ScriptManager ID="ScriptManager1" EnablePageMethods="true" runat="server"> </asp:ScriptManager> <input id="Button1" type="button" value="button" onclick="return Button1_onclick()" /></div> </form></body></html>test.cs 代码如下:
using System;using System.Data;using System.Configuration;using System.Collections;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 test: System.Web.UI.Page{ protected void Page_Load(object sender, EventArgs e) { } [System.Web.Services.WebMethod] public string GetTime() { return DateTime.Now.ToString(); }}真的感叹MS Ajax1.0的易用.这个例子很简单,但有时会报PageMethods未定义的错误,出现这个问题一般是没有为ScriptManager的属性 EnablePageMethods设为true造成的.这个属性的默认值是 false,即不暴露 cs文件中的方法.第二个可能的原因是在方法上忘了加 [System.Web.Services.WebMethod] 特性.
<asp:ScriptManager ID="ScriptManager1" EnablePageMethods="true" runat="server">
</asp:ScriptManager>
有时候由于版本问题,后面CS文件中的被调用函数需要声明为 static 静态类型.
