/// <summary>
        /// 根据GroupName从数据库读入数据
        /// </summary>
        public void LoadFromDatabase(string groupName)
        {
            Clear();

            IList <CustomSearchInfo> lists = ADInfoBll.Instance.GetCustomSearchInfo(groupName);

            for (int i = 0; i < lists.Count; ++i)
            {
                if (!Authority.AuthorizeByRule(lists[i].Visible))
                {
                    continue;
                }

                myComboBox1.Items.Add(new object[] { lists[i].Text });

                dict[lists[i].Text] = lists[i].SearchExpression;
            }

            myComboBox1.AdjustDropDownControlSize();
        }