RowCommand问题

我在前台里放下个ImageButten后台的点击ImageButten后台的RowCommand根本不运行,,请问这是什么回事:
以下是前后台代码:

前台添加一模版列,里面添加一个ImageButton
<asp:TemplateField HeaderText="测试">
                                  <ItemTemplate>
                                      <asp:ImageButton ID="Button1" CommandName="btn" runat="server" \ Text="Button" ImageUrl="~/images/control/del1.gif" />
                                  </ItemTemplate>
                              </asp:TemplateField>

后台
   protected void GridView1_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        if ( == "btn")
        {      Response.Write("试一下");
        }
}

[[it] 本帖最后由 willam 于 2008-2-24 13:51 编辑 [/it]]