添加一个确认窗口

<asp:TemplateField>    
                                <ItemTemplate>    
                                    <asp:LinkButton ID="lbDel" runat="server" Text="删除" CommandName="DeleteUser"   
                                     CommandArgument='<%# DataBinder.Eval(Container.DataItem, "UserName") %>' OnCommand="LinkButtonClick"     
                                      ForeColor="blue" OnClientClick="return confirm('确定要删除该用户吗？');">    
                                    </asp:LinkButton>    
                                </ItemTemplate>    
 </asp:TemplateField>