用最简单的方法实现Ajax Aspx文件: <script type="text/javascript"> function callToServer() { var param = document.getElementById("txtMessage").value + "&pa"+document.getElementById("a").value; var context = ""; document.getElementById("a").value = document.getElementById("a").value;// WebForm_InitCallback(); <% = callbackScript %> } function handleResultFromServer(result) { document.getElementById("txtResult").innerHTML = result; } </script> <form id="form1" runat="server"> <div><INPUT id="txtMessage" /> a<input id="a" name="a" /> <INPUT onclick="callToServer();" type="button" value="Call to Server" /> <br /> <span style="color:#ff0000"></span> Result : <div id="txtResult"></div> </div> </form> Aspx.cs文件: public partial class Test : System.Web.UI.Page, System.Web.UI.ICallbackEventHandler{ protected string callbackScript { get { ClientScriptManager cm = Page.ClientScript; //return this.GetCallbackEventReference(this, "param", "handleResultFromServer", "context"); return cm.GetCallbackEventReference(this, "param", "handleResultFromServer", "context"); } } private string arg = ""; protected void Page_Load(object sender, EventArgs e) { } public void RaiseCallbackEvent(string eventArgument) { arg = eventArgument + Request["a"]; for (int i = 0; i < Request.Params.Count; i++) { arg += "Name:" + Request.Params.GetKey(i) +":Value:<span style=\"color:#ff0000\">" + Request.Params[i] + "</span><br/>"; } } public string GetCallbackResult() { return "客户端在[" + DateTime.Now.ToString() + "]传送来 [" + arg + "]."; }} 这里主要是用到了Asp.net自带的 System.Web.UI.ICallbackEventHandler接口。实现的这个接口的控件(包括页面)都可以以异步的方式用服务器发送数据。还可以设置一个回调函数。这个方法有两个局限:函数的返回类型只能是字符串类型。方法只有一个参数(可以通过分割字符串实现多个参数,但不安全。)