I’m trying to implement a transaction with entity framework 4. From what I’ve read,

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Asked: May 17, 20262026-05-17T01:31:03+00:00 2026-05-17T01:31:03+00:00

I’m trying to implement a transaction with entity framework 4. From what I’ve read,

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I’m trying to implement a transaction with entity framework 4. From what I’ve read, the code below is correct. The SaveChanges works fine but as soon as I hit the first ExecuteFunction call I get the following exception:

The underlying provider failed on
Open. —>
System.Transactions.TransactionManagerCommunicationException:
Network access for Distributed
Transaction Manager (MSDTC) has been
disabled. Please enable DTC for
network access in the security
configuration for MSDTC using the
Component Services Administrative
tool.

I’ve logged on to the database server and I don’t see a service called Distributed Transaction Manager but I do see Distributed Transaction Coordinator and it is started. I’m not sure what I need to change to allow this to work. Anyone know? Thanks.

Here’s the code.

using (var h = new WhaleEntities(ConnectionHelper.DBConnectString))
{
    using (TransactionScope ts = new TransactionScope())
    {
        h.Sites.AddObject(s);
        h.SaveChanges(SaveOptions.DetectChangesBeforeSave); 
        retval = s.SiteID;

        h.ExecuteFunction("UpdateSiteInterfaceList", new ObjectParameter("pSiteID", retval), new ObjectParameter("pList", "10"));
        h.ExecuteFunction("UpdateSiteInterfaceRequiredList", new ObjectParameter("pSiteID", retval),new ObjectParameter("pList", "Email"));
        h.ExecuteFunction("UpdateSiteInterfaceAlwaysShownList", new ObjectParameter("pSiteID", retval),new ObjectParameter("pList", "10"));
        h.ExecuteFunction("UpdateSiteInterfaceAlwaysRequiredList",new ObjectParameter("pSiteID", retval),new ObjectParameter("pList", "Email"));

        ts.Complete();

        //changes must be accepted manually once transaction succeeds.
        h.AcceptAllChanges();
    }
}