如何在实体框架中使用交易？

Question

How to use transactions in Entity Framework? I read some links on Stackoverflow : Using Transactions or SaveChanges(false) and AcceptAllChanges()?

BUT; i have 3 table so i have 3 entities:

CREATE TABLE Personel 
(PersonelID integer PRIMARY KEY identity not null, 
Ad varchar(30), 
Soyad varchar(30),
Meslek varchar(100),
DogumTarihi datetime,
DogumYeri nvarchar(100),
PirimToplamı float);

Go

create TABLE Prim
(PrimID integer PRIMARY KEY identity not null,
PersonelID integer Foreign KEY references Personel(PersonelID),
SatisTutari int,
Prim float,
SatisTarihi Datetime);

Go

CREATE TABLE Finans 
(ID integer PRIMARY KEY identity not null, 
Tutar float);

Personel, Prim, Finans my tables. If you look Prim table you can see Prim value float value if I write a textbox not float value my transaction must run.

using (TestEntities testCtx = new TestEntities())
{
    using (TransactionScope scope = new TransactionScope())
    {
       // do something...
       testCtx.Personel.SaveChanges();
       // do something...
       testCtx.Prim.SaveChanges();
       // do something...
       testCtx.Finans.SaveChanges();
       scope.Complete();
       success = true;
    }
}

How can I do that?

Answer 1

When you make the call to SaveChanges , the Entity Framework will perform those operations in a single transaction.

When you use the TransactionScope class , you are saying "I want what runs in this block to be encapsulated in a larger transaction", which is indeed what you do.

When you call Complete on the TransactionScope , that is what perform the committing of all of the operations encapsulated in the transaction defined by the TransactionScope .

Answer 2

SaveChanges operates within a transaction. SaveChanges will roll back that transaction and throw an exception if any of the dirty ObjectStateEntry objects cannot be persisted.

from the documentation

Answer 3

MSDN站点中有类似的示例 。