Question

Exception: ‘Distributed transaction completed. Either enlist this session in a new transaction or the NULL transaction’

This is hapening inside a SProc running on a machine having both SQL 2005 and Sql 2008 hosted.

The C# code looks something like this

(using TransactionScope t = new TransactionScope ()) {    using(SqlConnection c= new SqlConnection(...))    {       c.Open();       DataContext1 ctx = new DataContext1(c);//Linq2SQL       c.StoreData(2,3);//Call Sproc    } } 

Sproc Looks like this

Select * Table where x=2 and y=3 if(@@rowcount =0)    Insert into table values(2,3) end if 

Answer 1

That error is due to a constraint failure on DB front. Your transaction is being rolled back (meaning nothing is happening to the database).

Basically, it’s an error occurring in a transaction that we can’t readily identify without more information. Post your query.