varsql=$"select * from dc_base_finance_fee where cost_status=4 and is_lend!=2 and pay_time>='{start.ToString("yyyy-MM-dd")}' and pay_time<'{end.AddDays(1).ToString("yyyy-MM-dd")}'";
varsql=$"select * from dc_base_finance_fee where cost_status=4 and (is_lend is null or is_lend=1) and pay_time>='{start.ToString("yyyy-MM-dd")}' and pay_time<'{end.AddDays(1).ToString("yyyy-MM-dd")}'";