GridView中的编辑和删除按钮获取当前行的非主键字段的值

GridView控件绑定了一个Flag字段，值如下：0-未审核，1-审核通过，2-审核未通过，数据库中保存的是编号，而GridView中显示的是对应的名称。
要在编辑或删除前需要获取Flag编号，则有两种情况：（在RowDataBound事件中使用DataBinder.Eval(e.Row.DataItem, "Flag").ToString();获取）
（1）如果GridView在显示中未进行转换，直接显示编号，则在编辑或删除时要获取编号值，很简单
在RowDeleting事件中使用GridView.Rows[e.RowIndex].Cells[n].Text
在RowEditing事件中使用GridView.Rows[e.NewEditIndex].Cells[n].Text
（2）如果GridView在显示时进行了转换，显示的不是编号而是对应的汉字，如果还想在编辑或删除时获取编号，此编号又不是主键，可以通过给编辑或删除按钮设置CommandArgument来实现。
HTML中：

< asp:TemplateField HeaderText = " 编辑 " >
                                         < EditItemTemplate >
                                             < asp:LinkButton ID = " lbtnUpdate "  runat = " server "  CommandName = " Update " > 更新 </ asp:LinkButton >
                                             < asp:LinkButton ID = " lbtnCancel "  runat = " server "  CausesValidation = " False "  CommandName = " Cancel " > 取消 </ asp:LinkButton >
                                         </ EditItemTemplate >
                                         < ItemTemplate >
                                             < asp:ImageButton ID = " ImageButton1 "  runat = " server "  CausesValidation = " False "  CommandArgument = ' <%# DataBinder.Eval(Container.DataItem,"Flag") %> '
                                                ImageUrl = " ~/Images/edit.gif "  CommandName = " Edit "   />
                                         </ ItemTemplate >
                                     </ asp:TemplateField >
                                     < asp:TemplateField HeaderText = " 删除 " >
                                         < ItemTemplate >
                                             < asp:ImageButton ID = " lbtnDelete "  runat = " server "  CausesValidation = " False "  CommandName = " Delete "  CommandArgument = ' <%# DataBinder.Eval(Container.DataItem,"Flag") %> '
                                                ImageUrl = " ~/Images/delete.gif "  OnClientClick = " return confirm('确定要删除吗？') "   />
                                         </ ItemTemplate >
                                     </ asp:TemplateField >

C#中：

  protected   void  gvReward_RowDeleting( object  sender, GridViewDeleteEventArgs e)
    {
         string  strFlag  =  ((ImageButton)gvReward.Rows[e.RowIndex].FindControl( " lbtnDelete " )).CommandArgument; // 在HTML中设置了CommandArgument，使其绑定了Falg字段的值
         // string strFlag = gvReward.Rows[e.RowIndex].Cells[7].Text.ToString().Trim(); // 获取当前行中被绑定的‘Flag’字段的值
         if  (strFlag  ==   " 1 " )
        {
            ScriptManager.RegisterStartupScript( this .Page,  typeof (Page),  "" ,  " alert('此信息学工处已审核通过，不允许删除') " ,  true );
        }
         else
        {
             int  iID  =  Convert.ToInt32(gvReward.DataKeys[e.RowIndex].Value);
             try
            {
                 if  (StudentReward.RemoveRewardList(iID))
                {
                    ScriptManager.RegisterStartupScript( this .Page,  typeof (Page),  "" ,  " alert('删除成功') " ,  true );
                    BindGridView();
                }
                 else
                {
                    ScriptManager.RegisterStartupScript( this .Page,  typeof (Page),  "" ,  " alert('删除失败') " ,  true );
                }
            }
             catch  (Exception ex)
            {
                ScriptManager.RegisterStartupScript( this .Page,  typeof (Page),  "" ,  " alert('删除出现异常') " ,  true );
            }
        }
    }

  protected   void  gvReward_RowEditing( object  sender, GridViewEditEventArgs e)
    {
         string  strFlag  =  ((ImageButton)gvReward.Rows[e.NewEditIndex].FindControl( " ImageButton1 " )).CommandArgument; // 在HTML中设置了CommandArgument，使其绑定了Falg字段的值
         if  (strFlag  ==   " 1 " )  // 审核没通过的，也可以修改，不过此时审核状态需要同时修改为“0”未审核
        {
            ScriptManager.RegisterStartupScript( this .Page,  typeof (Page),  "" ,  " alert('此信息学工处已审核通过，不允许修改') " ,  true );
        }
         else
        {
            gvReward.EditIndex  =  e.NewEditIndex;
            BindGridView();
        }
    }