protected void Commit_Click(object sender, EventArgs e)
        {
            string DefaultStr = @"ctl00$MainContent$";

            string teamID = Request.Form[DefaultStr + "teamID"].Trim();
            string teamName = Request.Form[DefaultStr + "teamName"].Trim();

            //Require check
            if (string.IsNullOrEmpty(teamID) && string.IsNullOrEmpty(teamName))
            {
                SuccessMessage.Text = string.Empty;
                ErrorMessage.Text = @"队伍ID和队伍名称请至少填写一个";

                return;
            }

            TeamManage tm = new TeamManage();

            if (tm.hasAlreadyJoined(user))
            {
                SuccessMessage.Text = string.Empty;
                ErrorMessage.Text = "您已经加入到其它队伍了,无法再加入队伍";

                return;
            }

            if (!tm.isTeamValid(teamID, teamName))
            {
                SuccessMessage.Text = string.Empty;
                ErrorMessage.Text = "无效的队伍名称或ID,请检查";

                return;
            }

            if (string.IsNullOrEmpty(teamID))
                teamID = tm.queryTeamID(teamName);

            if (tm.joinTeam(teamID, user))
            {
                SuccessMessage.Text = "加入队伍成功";
                ErrorMessage.Text = string.Empty;
            }
            else
            {
                SuccessMessage.Text = string.Empty;
                ErrorMessage.Text = @"后台业务出现错误,请联系网站维护人员";
            }
        }
        public string modifyUserTeam()
        {
            string sysid = Request["sysid"];
            string teamid = Request["teamid"];
            string teamname = Request["teamname"];

            TeamManage tm = new TeamManage();
            if (!tm.isTeamValid(teamid, teamname))
            {
                return  @"填入的队伍信息有误";

            }
            if (string.IsNullOrEmpty(teamid))
                teamid = tm.queryTeamID(teamname);

            if (tm.updateTeamMember(sysid, teamid))
                return @"操作成功";
            else
                return @"操作失败";
        }