ASP.NET2.0中用ICallbackEventHandler实现客户端与服务器端异步交互
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ASP.NET2.0中用ICallbackEventHandler实现客户端与服务器端异步交互
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頁面代碼:
<script type="text/javascript">
????? function ReceiveServerData(rValue)
????? {
???????? alert(rValue);
????? }
?</script>
<input id="Button1" type="button" value="button" onclick ="CallServer('Client')" />
服務端代碼:
{
????public?string?CallBackValue?=?null;
????protected?void?Page_Load(object?sender,?EventArgs?e)
????{
????}
?????//?注冊腳本到前臺頁面
????protected?void?Page_PreRender(object?sender,?EventArgs?e)
????{
????????RegClientScript();
????}
????//?javascript函數(服務器端事件的客戶端回調)
????protected?void?RegClientScript()
????{
???????ClientScriptManager?cs?=?Page.ClientScript;
???????string?jstxt=@"?
??????????????????function?CallServer(msgid)
??????????????????{
?????????????????????"?+?cs.GetCallbackEventReference(this,?"msgid",?"ReceiveServerData",?null)?+?@";
??????????????????}";
???????cs.RegisterStartupScript(this.GetType(),?"callserver",?jstxt,?true);
????}
????//ICallbackEventHandler接口
????//把值傳到前臺
????string?ICallbackEventHandler.GetCallbackResult()
????{
????????return?CallBackValue?+?",Server";
????}
????//按受前臺的參數
????void?ICallbackEventHandler.RaiseCallbackEvent(string?eventArgument)
????{
????????this.CallBackValue?=?eventArgument;
????}
}
運行結果: (實現異步交互,頁面不刷新)
轉載于:https://www.cnblogs.com/chy710/archive/2006/12/26/604118.html
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