从事件中获取出发事件的对象

Question

　　在ASP.Net中定义了OnClick之类的事件，那么，如何从事件中反过来捕获到出发事件的对象呢，比如，在如下的函数button_click中输出触发者的ＩＤ值。
    protected void testCommand(object sender, CommandEventArgs e)
    {
        Response.Write("<br>从Button的Command事件中捕获的参数：<br>commandArgument:" + e.CommandArgument + "<br>commandName:" + e.CommandName);
    }
    protected void button_click(object sender, EventArgs e)
    {
        Response.Write("Button点击事件的函数触发");
    }
.....
        <asp:Button ID="Button1" runat="server" CommandArgument="theCommandArgument" CommandName="theCommandName"
            OnClick="button_click" OnCommand="testCommand" Text="Button" />
        <asp:LinkButton ID="LinkButton1" runat="server" CommandArgument="linkButton.CommandArgument"
            CommandName="linkButton.CommandName" OnClick="button_click" OnCommand="testCommand">LinkButton</asp:LinkButton>

Answer 1

        protected   void   button_click(object   sender,   EventArgs   e) 
        { 
                Button ctl=sender as Button;
                if (ctl != null)
                {
                     Response.Write("觸發事件的對象ID為:{0}",ctl.ID); 
                }
        }