这个web控件怎么写

[OICQshenshi]

Assume a web control in Asp.Net is defined as following:
public class SampleWebControl : WebControl, IPostBackEventHandler
{
public SampleWebControl(){
}
}

However, the above class hasn't been finished yet. One additional method has to be added to the class, otherwise, C# compiler won't pass. Please give the name of the method, and briefly describe what can be achieved by using the method.

[szldk]

路过,
帮顶,

[yankunlin]

要做什么功能的

[OICQshenshi]

[Quote=引用 2 楼 yankunlin 的回复:]
要做什么功能的
[/Quote]
随意，最简单的就行，先谢了

[shankaipingo]

要实现继承的接口吧

[OICQshenshi]

顶

[OICQshenshi]

睡前顶下，有人会吗？

[lovnov]

Seems you are trying to create a custom control which inherits from WebControl.
I think the method should be
protected override void Render(HtmlTextWriter writer)
{

}

[xieliliang]

帮顶吧

[xie_yanke]

COPY MSDN：

using System;
using System.Web.UI;
using System.Collections;
using System.Collections.Specialized;

namespace CustomControls {

   [System.Security.Permissions.PermissionSet(System.Security.Permissions.SecurityAction.Demand, Name="FullTrust")]   
   public class MyButton: Control, IPostBackEventHandler {

      // Defines the Click event.
      public event EventHandler Click;

      //Invoke delegates registered with the Click event.
      protected virtual void OnClick(EventArgs e) {

         if (Click != null) {
            Click(this, e);
         }   
      }


      // Define the method of IPostBackEventHandler that raises change events.
      public void RaisePostBackEvent(string eventArgument){

         OnClick(new EventArgs());
      }


      protected override void Render(HtmlTextWriter output) {
         output.Write("<INPUT TYPE = submit name = " + this.UniqueID + 
            " Value = 'Click Me' />");   
      }
   }    
}