两个按钮执行同一事件方法但执行不同代码的使用

界面：

  <asp:Label ID="Label1" runat="server" Text="Label"></asp:Label>

 <asp:Button ID="Button1" runat="server" Text="Button" onclick="qintianqi" />
 <asp:Button ID="Button2" runat="server" Text="Button"  onclick="qintianqi" />

服务器端处理：

 protected void qintianqi(object sender, EventArgs e)
        {
            Button b = sender as Button;
            string btid = b.ID;
            switch (btid)
            {
                case "Button1":
                    Label1.Text = "qintianqi";
                    break;
                case "Button2":
                    Label1.Text = "zhuguanghuan";
                    break;
                default:
                    break;
            }
        }