如何使用LINQ获得NOT Equal功能？

Question

我想从 HireGroupDetails 中获取车辆的所有记录，但不知道如何获得 NOT EQUAL LINQ 中的功能！

var fleetHireGroupDetailQuery = from vehicle in db.Vehicles                
                                join hgd in db.HireGroupDetails on
                    new { vehicle.VehicleMakeId, vehicle.ModelYear }
                    equals new {  hgd.VehicleMakeId,  hgd.ModelYear}
                    select new RptFleetHireGroupDetail
                     {
                          PlateNumber = vehicle.PlateNumber,
                     };

Answer 1

我认为这就是你所需要的：

var fleetHireGroupDetailQuery = from vehicle in db.Vehicles
                                where !(from hgd in db.HireGroupDetails
                                select new {  hgd.VehicleMakeId,  hgd.ModelYear}).Contains(new { vehicle.VehicleMakeId, vehicle.ModelYear })
                    select new RptFleetHireGroupDetail
                     {
                          PlateNumber = vehicle.PlateNumber,
                     };