Question

你好我试图在我的查询中减去两个DateTimes并将defference与timeInterval进行比较，但我得到了exeption：

 <Message>An error has occurred.</Message>
 <ExceptionMessage>System.TimeSpan Subtract(System.DateTime)</ExceptionMessage>
 <ExceptionType>System.NotSupportedException</ExceptionType>

C＃代码：

 producerRelations = producerRelationRepository.Query().Fetch(c => c.Order).
                Where(c => c.Order.CreatedBy == login).
                Where(c=>currentDate.Subtract(c.RouteUnit.DtStart.Value).TotalMinutes<timeInterval);

如何在代码中减去日期？

Answer 1

使用AsEnumerable

 producerRelations = producerRelationRepository.Query().Fetch(c => c.Order).
                Where(c => c.Order.CreatedBy == login).AsEnumerable().
                Where(c=>currentDate.Subtract(c.RouteUnit.DtStart.Value).TotalMinutes<timeInterval);

或者您需要使用EntityFunctions

在IQueryable查询中减去DateTimes

1 个答案: