asp.net gridview 可以填写的列

  <asp:TemplateField HeaderText="操作">
                    <ItemTemplate>
                        <asp:Button ID="btnDel" runat="server" CommandName="Del"  CommandArgument="id" OnClick="btnDel_Click" Text="删除" />
                        <asp:Button ID="Button3" runat="server" Text="Button" />
                    </ItemTemplate>
 </asp:TemplateField>