如何使用LINQ獲得不相等的功能？

Question

我想從HireGroupDetails中不匹配但不知道如何在LINQ中獲得NOT EQUAL功能的車輛中獲取所有這些記錄！

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

我認為這是您需要的：

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,
                     };