/// <summary>
        /// 批量删除
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        protected void lnkbBatchDelete_Click(object sender, EventArgs e)
        {
            string loginIDs = string.Empty;

            foreach (DataListItem item in this.dtlUser.Items)
            {
                HtmlInputCheckBox chkbUserID = (HtmlInputCheckBox)item.FindControl("chkbUserID");
                if (chkbUserID.Checked)
                {
                    if (loginIDs == string.Empty)
                    {
                        loginIDs = "'" + chkbUserID.Value + "'";
                    }
                    else
                    {
                        loginIDs = loginIDs + "," + "'" + chkbUserID.Value + "'";
                    }
                }
            }
            if (loginIDs.Length != 0)
            {
                loginIDs = "(" + loginIDs + ")";
                UserBusiness userBusiness = new UserBusiness();
                userBusiness.BatchDeleteUsers(loginIDs);
            }
            this.BindDataList();
        }