LINQ, where子句如果字段是int

Question

给定以下LINQ where子句:

plannedPosition。Id的类型是int?

pmArray的类型是int[]

//Works
where
pmArray.Contains(plannedPosition.Id.Value)

//Does not work - will give a design time error
where
pmArray.Contains(plannedPosition.Id)

如何使查询更健壮，以确保没有null运行类型异常发生?

Answer 1

如何:

where plannedPosition.Id != null && pmArray.Contains(plannedPosition.Id.Value)