private void UpdateAnnounceInfo_Click(object sender, EventArgs e)
        {
            #region 更新公告相关信息

            if (this.CheckCookie())
            {
                AnnouncementInfo announcementInfo = new AnnouncementInfo();
                announcementInfo.Id           = DNTRequest.GetInt("id", 0);
                announcementInfo.Poster       = poster.Text.Trim();
                announcementInfo.Title        = title.Text.Trim();
                announcementInfo.Displayorder = TypeConverter.StrToInt(displayorder.Text);
                announcementInfo.Starttime    = Convert.ToDateTime(starttime.Text);
                announcementInfo.Endtime      = Convert.ToDateTime(endtime.Text);
                announcementInfo.Message      = DNTRequest.GetString("announcemessage_hidden").Trim();
                Announcements.UpdateAnnouncement(announcementInfo);
                //移除公告缓存
                Discuz.Cache.DNTCache.GetCacheService().RemoveObject("/Forum/AnnouncementList");
                Discuz.Cache.DNTCache.GetCacheService().RemoveObject("/Forum/SimplifiedAnnouncementList");

                //记录日志
                AdminVistLogs.InsertLog(this.userid, this.username, this.usergroupid, this.grouptitle, this.ip, "更新公告", "更新公告,标题为:" + title.Text);
                base.RegisterStartupScript("PAGE", "window.location.href='global_announcegrid.aspx';");
            }
            #endregion
        }