Entity Framework 没有保存对表所做的所有更改
Entity Framework not saving all changes made to tables
我正在尝试用一种方法将数据保存到两个不同的表中。第一次 db.SaveChanges()
调用正确地更新了数据,但第二次调用 SaveChanges 时,它什么也没做,即使我清楚地更改了数据。
PhaseStatus truckPhase = db.PhaseStatus.Where(x => x.TruckId == truckId).FirstOrDefault();
RTrucks truck = db.RTrucks.Where(x => x.Id == truckId).FirstOrDefault();
using (var ContextTransaction = db.Database.BeginTransaction())
{
db.PhaseStatus.Attach(truckPhase);
var entryPS = db.Entry(truckPhase);
entryPS.State = EntityState.Modified;
db.SaveChanges(); //Success
if (truckPhase.Phase.PhaseName == "Not Started")
truck.Status = "Quoted";
else truck.Status = "Active";
db.RTrucks.Attach(truck);
var entryRT = db.Entry(truck);
entryPS.State = EntityState.Modified;
db.SaveChanges(); //Fails with no errors
ContextTransaction.Commit();
}
有人知道为什么 EF6 会这样做吗?我做错了什么吗?
在您的第二个区块更改中:
entryPS.State = EntityState.Modified;
至
entryRT.State = EntityState.Modified;
我正在尝试用一种方法将数据保存到两个不同的表中。第一次 db.SaveChanges()
调用正确地更新了数据,但第二次调用 SaveChanges 时,它什么也没做,即使我清楚地更改了数据。
PhaseStatus truckPhase = db.PhaseStatus.Where(x => x.TruckId == truckId).FirstOrDefault();
RTrucks truck = db.RTrucks.Where(x => x.Id == truckId).FirstOrDefault();
using (var ContextTransaction = db.Database.BeginTransaction())
{
db.PhaseStatus.Attach(truckPhase);
var entryPS = db.Entry(truckPhase);
entryPS.State = EntityState.Modified;
db.SaveChanges(); //Success
if (truckPhase.Phase.PhaseName == "Not Started")
truck.Status = "Quoted";
else truck.Status = "Active";
db.RTrucks.Attach(truck);
var entryRT = db.Entry(truck);
entryPS.State = EntityState.Modified;
db.SaveChanges(); //Fails with no errors
ContextTransaction.Commit();
}
有人知道为什么 EF6 会这样做吗?我做错了什么吗?
在您的第二个区块更改中:
entryPS.State = EntityState.Modified;
至
entryRT.State = EntityState.Modified;