高手帮忙解答一下?

[MaDaHai]

关于用户控件事件的委托
我的用户控件包含四个按钮Button
代码如下:
public delegate void ClickEventHandler(object sender, EventArgs e);
public class MyUserControl : System.Web.UI.UserControl
{
protected System.Web.UI.WebControls.Button AButton;
protected System.Web.UI.WebControls.Button BButton;
protected System.Web.UI.WebControls.Button CButton;
public event ClickEventHandler Click;
protected void OnClick(EventArgs e)
{
if (Click!=null) Click(this, e);
}
private void AButton_Click(object sender, System.EventArgs e)
{
this.OnClick(e);
}
private void BButton_Click(object sender, System.EventArgs e)
{
this.OnClick(e);
}
private void CButton_Click(object sender, System.EventArgs e)
{
this.OnClick(e);
}
}
包含UserControl的页面cs文件中的处理
private void InitializeComponent()
{
this.Load += new System.EventHandler(this.Page_Load);
MyUserControl uc = this.FindControl("myUserControlID") as MyUserControl;
uc.Click += new ClickEventHandler(this.UserControl_Clicked);
}
private void UserControl_Clicked(object sender, System.EventArgs e)
{
//问题在这里,怎么判断具体被按下哪个按钮
}

[Seeko0]

public MyUserControl(){
AButton.ID = "A";
BButton.ID = "B";
CButton.ID = "C";

}

private void UserControl_Clicked(object sender, System.EventArgs e)
{
//问题在这里,怎么判断具体被按下哪个按钮
Button btn=(Button)sender; //Unbox
switch(btn.ID){
case "A" : AButton_Click(sender,e);break; //表示执行A按钮
...
case "C" : CButton_Click(sender,e);break; //表示执行A按钮
default:break;
}
}

[MaDaHai]

Button btn=(Button)sender;出错
Specified cast is not valid

[saucer]

either use a custom EventArgs, see an example

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfsystemeventargsclasstopic.asp

or try


protected void OnClick(object sender, System.EventArgs e)
{
if (Click!=null) Click(sender, e);
}

private void AButton_Click(object sender, System.EventArgs e)
{
this.OnClick(AButton,e);
}
private void BButton_Click(object sender, System.EventArgs e)
{
this.OnClick(BButton,e);
}
private void CButton_Click(object sender, System.EventArgs e)
{
this.OnClick(CButton,e);
}


then use Seeko0(阿 枫) 's method, but it is bad