private void DeleteAnnounce_Click(object sender, EventArgs e)
        {
            #region  除公告

            if (this.CheckCookie())
            {
                Announcements.DeleteAnnouncements(DNTRequest.GetString("id"));
                //记录日志
                AdminVistLogs.InsertLog(this.userid, this.username, this.usergroupid, this.grouptitle, this.ip, "删除公告", "删除公告,标题为:" + title.Text);
                base.RegisterStartupScript("PAGE", "window.location.href='global_announcegrid.aspx';");
            }
            #endregion
        }