public CarCollectionModel CheckCollection(CarCollectionModel model)
{
const string sql =
@"select innerid, custid, carid, remark, createdtime from car_collection where custid=@custid and carid=@carid;";
return
Helper.Query<CarCollectionModel>(sql, new { custid = model.Custid, carid = model.Carid }).FirstOrDefault();
}