/// <summary>
        /// 分页得到列表<para>如果没有对像的可以传入 object 或者  dynamic </para>
        /// </summary>
        /// <param name="pageIndex">显示页号</param>
        /// <param name="pageSize">每页显示数</param>
        /// <param name="columnName">需要获取的列名<para>为了方便不在处理,列与列用逗号分开,参照SQL写法</para></param>
        /// <param name="dapperWheres">条件列表</param>
        /// <param name="filedOrder">排序</param>
        /// <returns>返回列表</returns>
        public List <T> GetList <T>(int pageIndex, int pageSize, string columnName, List <DapperWhere> dapperWheres, string filedOrder)
        {
            if (columnName.Length < 1)
            {
                columnName = "*";
            }

            StringBuilder strSql = new StringBuilder();

            string where = "";
            Dictionary <string, object> parm = new Dictionary <string, object>();

            foreach (DapperWhere item in dapperWheres)
            {
                if (where.Length > 0)
                {
                    where += " and ";
                }
                where += item.Where;
                parm[item.ColumnName] = item.Value;
            }
            strSql.Append(" SELECT * FROM ( ");
            strSql.Append(" SELECT ROW_NUMBER() OVER ( ");
            if (filedOrder.Length > 0)
            {
                strSql.Append(" order by " + filedOrder + " ");
            }
            else
            {
                strSql.Append(" order by T.id  desc");
            }
            strSql.Append(" )AS overRow, " + columnName + " from I200.dbo.T_ExchangeLog T  ");

            if (where.Length > 0)
            {
                strSql.Append(" where " + where + " ");
            }
            strSql.Append(" ) TT ");
            strSql.Append(" WHERE TT.overRow between @startIndex and @endIndex; ");

            if (pageIndex < 1)
            {
                pageIndex = 1;
            }

            int bgNumber = ((pageIndex - 1) * pageSize) + 1;
            int edNumber = (pageIndex) * pageSize;

            parm["startIndex"] = bgNumber;
            parm["endIndex"]   = edNumber;

            return(HelperForFrontend.Query <T>(strSql.ToString(), parm).ToList());
        }
        /// <summary>
        /// 获得数据列表
        /// </summary>
        /// <param name="top">前几行</param>
        /// <param name="dapperWheres">查询条件列表</param>
        /// <param name="filedOrder">排序</param>
        public List <T_ExchangeLog> GetList(int top, List <DapperWhere> dapperWheres, string filedOrder)
        {
            StringBuilder strSql = new StringBuilder();

            string where = "";
            Dictionary <string, object> parm = new Dictionary <string, object>();

            foreach (DapperWhere item in dapperWheres)
            {
                if (where.Length > 0)
                {
                    where += " and ";
                }
                where += item.Where;
                parm[item.ColumnName] = item.Value;
            }

            strSql.Append("select ");

            if (top > 0)
            {
                strSql.Append(" top " + top.ToString() + " ");
            }
            strSql.Append(" * ");
            strSql.Append(" FROM I200.dbo.T_ExchangeLog ");
            if (where.Length > 0)
            {
                strSql.Append(" where " + where);
            }

            if (filedOrder.Length > 0)
            {
                strSql.Append(" order by " + filedOrder);
            }
            strSql.Append(";");
            return(HelperForFrontend.Query <T_ExchangeLog>(strSql.ToString(), parm).ToList());
        }