ASP。net中如何在一个按钮click事件中调用另一个按钮的click事件

方法一: 直接指定 事件
<asp:Button ID="btn1" runat="server" Text="按钮1" onclick="btn1_Click" /><br /><br /><br />
            <asp:Button ID="btn2" runat="server" Text="按钮2" onclick="btn1_Click" /> 

方法二:后台添加
        protected void Page_Load(object sender, EventArgs e)
        {
            Button btn;
            btn= new Button();
            btn.ID = "btn1";
            btn.Text = "按钮1";
            this.form1.Controls.Add(btn);
            btn.Click += new EventHandler(btn1_Click);

btn = new Button();
            btn.ID = "btn2";
            btn.Text = "按钮2";
            this.form1.Controls.Add(btn);
            btn.Click += new EventHandler(btn1_Click);
        }

        protected void btn1_Click(object sender, EventArgs e)
        {
            Page.ClientScript.RegisterStartupScript(Page.GetType(), "", "<script language="javascript">alert('点击了按钮事件');</script>");
        }