GridView自定义删除操作的具体方法

首先，我们前端的代码如下：

代码如下:
<asp:GridView ID="gridViewDxjk" CssClass="gridview" runat="server" AllowPaging="True"
                  DataKeyNames="P_ID" AutoGenerateColumns="False" 
                      RowStyle-HorizontalAlign="Center" BorderWidth="1px" PageSize="17"
                      onrowdeleting="gridViewDxjk_RowDeleting"
                      OnRowDataBound="gridViewDxjk_RowDataBound"
                      onpageindexchanging="gridViewDxjk_PageIndexChanging" >
                        <HeaderStyle CssClass="head" />
                        <PagerStyle CssClass="pager" />
                        <RowStyle CssClass="row" />
                        <EditRowStyle CssClass="editrow" />
                        <AlternatingRowStyle CssClass="altrow" />
                        <EmptyDataRowStyle CssClass="empty" />
                        <Columns>                           
                         <asp:HyperLinkField HeaderText="编辑" ControlStyle-Width="50" DataNavigateUrlFields="P_ID" DataNavigateUrlFormatString="smsModify.aspx?id={0}" Text="编辑"  >
                                <ControlStyle Width="50px"></ControlStyle></asp:HyperLinkField>
                                <asp:CommandField  ShowDeleteButton="true" DeleteText="删除"   >