去掉IPostBackDataHandler后，RaisePostBackEvent就执行了，为什么？
控件的源码如下：
using System;using System.Web.UI;using System.Web.UI.WebControls;using System.ComponentModel;namespace TestMyRaise
{
/// <summary>
/// RaiseTest 的摘要说明。
/// </summary> [DefaultProperty("Text"), ToolboxData("<{0}:RaiseTest runat=server></{0}:RaiseTest>")] public class RaiseTest : System.Web.UI.WebControls.WebControl,INamingContainer,IPostBackEventHandler,IPostBackDataHandler { private string text; public event EventHandler Click; [Bindable(true), Category("Appearance"), DefaultValue("")] public string Text { get { return text; } set { text = value; } } public override bool EnableViewState { get{return base.EnableViewState;} set{base.EnableViewState=true;} } protected virtual void OnClick(EventArgs e) { // EventHandler handler1=(EventHandler)base.Events[RaiseTest.EventClick];// if(handler1!=null)// {// handler1(this,new EventArgs());// } if(Click!=null) { Click(this,e); } } protected override void Render(HtmlTextWriter writer) { writer.Write("<input type=button value='clickme' id={0} onclick={1} />",UniqueID,Page.GetPostBackEventReference(this)); } /// <summary> /// 将此控件呈现给指定的输出参数。 /// </summary> /// <param name="output"> 要写出到的 HTML 编写器 </param> // protected override void RenderContents(HtmlTextWriter writer)// {//// writer.WriteBeginTag("input");//// writer.WriteAttribute("type","submit");//// writer.WriteAttribute("id",UniqueID);//// writer.WriteAttribute("name",UniqueID);//// writer.Write(" />");//// writer.Write(Text);// // }
IPostBackDataHandler 成员 IPostBackEventHandler 成员 }
}调用的页面Test1.aspx如下：
<%@ Register TagPrefix="Ra" Namespace="TestMyRaise" Assembly="TestMyRaise"%><%@ Page language="c#" Codebehind="Test1.aspx.cs" AutoEventWireup="false" Inherits="Test5.RaiseTest.Test1" %><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" ><HTML> <HEAD> <title>Test1</title> <meta name="GENERATOR" Content="Microsoft Visual Studio .NET 7.1"> <meta name="CODE_LANGUAGE" Content="C#"> <meta name="vs_defaultClientScript" content="JavaScript"> <meta name="vs_targetSchema" content="http://schemas.microsoft.com/intellisense/ie5"> </HEAD> <body MS_POSITIONING="GridLayout"> <form id="Form1" method="post" runat="server"> <Ra:RaiseTest runat="server" id="RaiseTest1" /> </form> </body></HTML>Test1.aspx.cs:
using System;using System.Collections;using System.ComponentModel;using System.Data;using System.Drawing;using System.Web;using System.Web.SessionState;using System.Web.UI;using System.Web.UI.WebControls;using System.Web.UI.HtmlControls;namespace Test5.RaiseTest{ /// <summary> /// Test1 的摘要说明。 /// </summary> public class Test1 : System.Web.UI.Page { protected TestMyRaise.RaiseTest RaiseTest1; private void Page_Load(object sender, System.EventArgs e) { // 在此处放置用户代码以初始化页面 } Web 窗体设计器生成的代码 private void RaiseTest1_Click(object sender, System.EventArgs e) { Response.Write("Test"); } }}