Question

I have created Generic Repository and I have two entities that i need to update in a transaction.
Here is what i m doing..

ProductOrganizationEntity poDataContext= new ProductOrganizationEntity();
IRepository<tblProductInfo> productRepo = new GenericRepository<ProductOrganizationEntity, tblConfirmation>(poDataContext);

Piece of Code which is causing problem is this.

 using (TransactionScope txScope = new TransactionScope())
 {
                    productRepo.Attach(productEntity);
                    productRepo.SaveChanges();
                    new ProductLocation().SaveLocation(productEntity.Locations, productEntity.productCode);
                    txScope.Complete();
 }

productRepo.SaveChanges(); This is where it throws me Error. The error is

The operation could not be performed because OLE DB provider "SQLNCLI10" for linked server "Venus" was unable to begin a distributed transaction.

(We do have server named Venus but its not access in anyway in these transactions at all. Secondly as i said this works without transaction block).

This piece of code works fine if taken out from Transaction Block.

ProductLocation.SaveLocation is creating Repository for Location . Here is the code from Save Location.

IRepository<LocationInfo> locRepo= new GenericRepository<ProductOrganizationEntity, LocationInfo>(new ProductOrganizationEntity());

 if (loc.locID <= 0) // This is a new Location to be added.
      locRepo.Add(locEntity);
 else
     locRepo.Attach(siteToAdd);

 locRepo.SaveChanges();

Here is what i have done in my generic repository for thse methods

   public void Attach(TEntity entity)
    {
        if (entity == null)
            throw new ArgumentException("Update : Supplied Entity is Null.");

        _currentDbSet.Add(entity);
        System.Data.Entity.Infrastructure.DbEntityEntry entry = _dataContext.Entry(entity);
        entry.State = System.Data.EntityState.Modified;
    }

and this is what i have in SaveChanges in my generic repo.

 public virtual void SaveChanges()
    {
        if (_dataContext == null)
            throw new Exception("SaveChanges: DataContext is not initialized.");

        _dataContext.SaveChanges();
    }

What is that i am doing wrong here .

I appreciate any pointers.

Answer 1

It might be possible that your server is linked to another SQL server at the database level.

Perhaps look at this: http://msdn.microsoft.com/en-us/library/ms188279.aspx

Must admit I’ve never used linked servers (not yet at least), but seeing “Linked Servers” in the error made me think of this.