以下是组件代码：
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usingSystem; usingSystem.Web.UI; usingSystem.Web.UI.WebControls; usingSystem.ComponentModel; namespaceNSEventStudy { publicdelegatevoidTwoEventHandle(intflag); publicclassEventStudy:System.Web.UI.WebControls.WebControl { ///////////////第一种定义事件的方法//////////////////// publiceventTwoEventHandleTwoEvent; publicvoidExecute(intflag) { TwoEvent(flag); } ////////////////第二种定义事件的方法//////////////////// privatestaticobject_Process=newobject(); publiceventTwoEventHandleThreeEvent { add { Events.AddHandler(_Process,value); } remove { Events.RemoveHandler(_Process,value); } } publicvoidInnerExecute(intflag) { TwoEventHandlehandle=(TwoEventHandle)Events[_Process]; if(handle!=null) { handle(flag); } else { this.RaiseBubbleEvent(this,null); } } protectedoverridevoidRender(HtmlTextWriterwriter) { base.Render(writer); writer.WriteLine("我爱你，中国"); } } } |
测试程序：
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usingSystem; usingSystem.Collections; usingSystem.ComponentModel; usingSystem.Data; usingSystem.Drawing; usingSystem.Web; usingSystem.Web.SessionState; usingSystem.Web.UI; usingSystem.Web.UI.WebControls; usingSystem.Web.UI.HtmlControls; namespaceTestEvent { ///<summary> ///WebForm1的摘要说明。 ///</summary> publicclassWebForm1:System.Web.UI.Page { protectedSystem.Web.UI.WebControls.ButtonButton1; protectedNSEventStudy.EventStudyEventStudy1; privatevoidPage_Load(objectsender,System.EventArgse) { //在此处放置用户代码以初始化页面 } #regionWeb窗体设计器生成的代码 overrideprotectedvoidOnInit(EventArgse) { // //CODEGEN:该调用是ASP.NETWeb窗体设计器所必需的。 // InitializeComponent(); base.OnInit(e); } ///<summary> ///设计器支持所需的方法-不要使用代码编辑器修改 ///此方法的内容。 ///</summary> privatevoidInitializeComponent() { this.EventStudy1.ThreeEvent+=newNSEventStudy.TwoEventHandle(this.EventStudy1_ThreeEvent); this.EventStudy1.TwoEvent+=newNSEventStudy.TwoEventHandle(this.EventStudy1_TwoEvent); this.Button1.Click+=newSystem.EventHandler(this.Button1_Click); this.Load+=newSystem.EventHandler(this.Page_Load); } #endregion privatevoidEventStudy1_TwoEvent(intflag) { this.Response.Write("<script>javascript:alert('TwoEvent事件触发')</script>"); } privatevoidEventStudy1_ThreeEvent(intflag) { this.Response.Write("<script>javascript:alert('ThreeEvent事件触发')</script>"); } privatevoidButton1_Click(objectsender,System.EventArgse) { this.EventStudy1.Execute(6); this.EventStudy1.InnerExecute(10); } } } |