GridView“gv_Info”激发了未处理的事件“RowEditing” “RowEditing”

因为在GridView的模板列中 使用了自加的编辑及删除按钮
前台代码如下：
<asp:GridView ID="gv_Info" runat="server" AllowSorting="True"
     AutoGenerateColumns="False"
     CssClass="GridView" OnRowCommand="gv_Info_RowCommand"
     OnRowDataBound="gv_Info_RowDataBound"
     OnSorted="gv_Info_Sorted" OnSorting="gv_Info_Sorting"
                        Width="100%" AllowPaging="True" >
...
<asp:TemplateField HeaderText="Operation" >
    <ItemStyle HorizontalAlign="Center" VerticalAlign="Middle"/>
         <ItemTemplate>
               <asp:ImageButton ID="imgbtn_Edit" runat="server"
                    AlternateText="Edit" CommandName="edit"
                    ImageAlign="AbsMiddle" ImageUrl="../Images/Edit.gif"  />
               <asp:ImageButton ID="imgbtn_Delete" runat="server"
                     AlternateText="Delete" CommandName="delete"
                    ImageAlign="AbsMiddle" ImageUrl="../Images/Delete.gif"  
      OnClientClick='<%# "return fnConfirmDelete(\"" + DataBinder.Eval(Container.DataItem,"UserName") + "\");" %>'
                 />
           </ItemTemplate>
</asp:TemplateField>
后台相关代码：
    protected void gv_Info_RowCommand(object sender, GridViewCommandEventArgs e)
    {
        string cmd = e.CommandName.ToLower().Trim();
        if (cmd == "edit")
        {
            gv_Row_Edit(e);
        }
        else if (cmd == "delete")
        {
            gv_Row_Delete(e);
        }
    }

编译通过
但在实际运行中 点击 编辑按钮 或 删除按钮 时 会

一种方法：
直接将 CommandName="edit" -》 CommandName="my_edit"
       CommandName="delete" -》 CommandName="my_delete"
另一种方法：
增加相应的gv_Info_RowEditing , gv_Info_RowDeleting 事件处理

    #region RowDeleting
    protected void gv_Info_RowDeleting(object sender, GridViewDeleteEventArgs e)
    {
    }
    #endregion