asp.net实现无刷新回调错误
我参照MSDN例子，为什么会出错，提示为
错误 1 “ClientCallback”不会实现接口成员“System.Web.UI.ICallbackEventHandler.RaiseCallbackEvent(string)”。“ClientCallback.RaiseCallbackEvent(string)”或者是静态、非公共的，或者有错误的返回类型。 c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\asysite\da5fa3f8\642075c6\App_Web_rp68m6mz.0.cs
错误 2 “ClientCallback”不会实现接口成员“System.Web.UI.ICallbackEventHandler.GetCallbackResult()” c:\WINDOWS\Microsoft.NET\Framework\v2.0.50727\Temporary ASP.NET Files\asysite\da5fa3f8\642075c6\App_Web_rp68m6mz.0.cs
接口实现有问题，请问是什么原因啊
问题点数：15、回复次数：4Top
1 楼peng_0_0_1983（这头猪很瘦）回复于 2006-06-01 14:53:59 得分 0
你是2003还是2005？
2003使用ajax.dll 实现ajax技术的话，目前不支持全部返回类型。
2005使用atlas的话，就应高没啥问题。Top
2 楼zhupan（天涯）回复于 2006-06-01 14:58:25 得分 0
2005，原则是不用ATLAS的，它自身就有无刷新功能的，只是操作出错，不知原因Top
3 楼wolfofsky（风之武）回复于 2006-06-01 15:17:14 得分 15
MSDN的例子有错误，接口方法已改变。给个例子
<%@ Page Language="C#" EnableViewState="false"%>
<%@ Implements Interface="System.Web.UI.ICallbackEventHandler" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<script runat="server">
public int cbCount = 0;
StringBuilder sb = new StringBuilder("No page postbacks have occurred.");
// Define method that processes the callbacks on server.
public void RaiseCallbackEvent(String eventArgument)
{
cbCount = Convert.ToInt32(eventArgument) + 1;
}
// Define method that returns callback result.
public string GetCallbackResult()
{
return cbCount.ToString();
}
protected void Page_Load(object sender, EventArgs e)
{
// Check if this is a postback.
if (Page.IsPostBack)
{
sb.Append("A page postback has occurred.");
}
// Write out any messages.
MyLabel.Text = sb.ToString();
// Get a ClientScriptManager reference from the Page class.
ClientScriptManager cs = Page.ClientScript;
// Define one of the callback script's context.
// The callback script will be defined in a script block on the page.
StringBuilder context1 = new StringBuilder();
context1.Append("function ReceiveServerData1(arg, context)");
context1.Append("{");
context1.Append("Message1.innerText = arg;");
context1.Append("value1 = arg;");
context1.Append("}");
// Define callback references.
String cbReference1 = cs.GetCallbackEventReference(this, "arg",
"ReceiveServerData1", context1.ToString());
String cbReference2 = cs.GetCallbackEventReference("'" +
Page.UniqueID + "'", "arg", "ReceiveServerData2", "",
"ProcessCallBackError", false);
String callbackScript1 = "function CallTheServer1(arg, context) {" +
cbReference1 + "; }";
String callbackScript2 = "function CallTheServer2(arg, context) {" +
cbReference2 + "; }";
// Register script blocks will perform call to the server.
cs.RegisterClientScriptBlock(this.GetType(), "CallTheServer1",
callbackScript1, true);
cs.RegisterClientScriptBlock(this.GetType(), "CallTheServer2",
callbackScript2, true);
}
</script>
<script type="text/javascript">
var value1 = 0;
var value2 = 0;
function ReceiveServerData2(arg, context)
{
Message2.innerText = arg;
value2 = arg;
}
function ProcessCallBackError(arg, context)
{
Message2.innerText = 'An error has occurred.';
}
</script>
<html xmlns="http://www.w3.org/1999/xhtml">
<head id="Head1" runat="server">
<title>ClientScriptManager Example</title>
</head>
<body>
<form id="Form1" runat="server">
<div>
Callback 1 result: <span id="Message1">0</span>
<br />
Callback 2 result: <span id="Message2">0</span>
<br />
<br />
<input type="button" value="ClientCallBack1" onclick="CallTheServer1(value1, alert('Increment value'))" />
<input type="button" value="ClientCallBack2" onclick="CallTheServer2(value2, alert('Increment value'))" />
<asp:Button ID="Button1" runat="server" Text="Button" />
<br />
<br />
<asp:Label ID="MyLabel" runat="server" EnableViewState="true"></asp:Label>
</div>
</form>
</body>
</html>Top
4 楼zhupan（天涯）回复于 2006-06-01 22:12:01 得分 0
谢谢！看懂了！哈哈Top
