使用 TransactionScope ：System.Transactions.TransactionAbortedException：事务已中止

Question

我们尝试使用下面的代码进行间接嵌套事务，.NET 3.5，& SQL Server 2005。MSDN

表示，使用 TransactionScope 时，只要应用程序在事务中打开第二个连接（甚至到同一个数据库），事务就会升级。

void RootMethod()
{
   using(TransactionScope scope = new TransactionScope())
   {
      /* Perform transactional work here */
      FirstMethod();
      SecondMethod();
      scope.Complete();
   }
 }

void FirstMethod()
{
    using(TransactionScope scope = new TransactionScope(TransactionScopeOption.Required))
   {
     using (SqlConnection conn1 = new SqlConnection("Data Source=(local);Initial Catalog=Northwind;Integrated Security=SSPI")) 
       {
     string insertString = @"
             insert into Categories
             (CategoryName, Description)
             values ('Laptop1', 'Model001')";
         conn1.Open();
         SqlCommand cmd = new SqlCommand(insertString, conn1);
         cmd.ExecuteNonQuery();
        }
      scope.Complete();
    }
 }

 void SecondMethod()
 {
    using(TransactionScope scope = new TransactionScope(TransactionScopeOption.Required))
   {
       using (SqlConnection conn2 = new SqlConnection("Data Source=(local);Initial Catalog=Northwind;Integrated Security=SSPI")) 
       {
     string insertString = @"
             insert into Categories
             (CategoryName, Description)
             values ('Laptop2', 'Model002')";

         conn2.Open();  //Looks like transactionabortedException is happening here
         SqlCommand cmd = new SqlCommand(insertString, conn2);
         cmd.ExecuteNonQuery();
        }
        scope.Complete();
    }
  }

有时，事务失败，没有升级到 DTC，我们得到以下内容作为内部堆栈跟踪，

System.Transactions.TransactionAbortedException: The transaction has aborted. ---> 
System.Transactions.TransactionPromotionException: Failure while attempting to promote transaction. ---> 
System.InvalidOperationException: The requested operation cannot be completed because the connection has been broken.     
at System.Data.SqlClient.SqlInternalConnectionTds.ExecuteTransaction(TransactionRequest transactionRequest, String name, IsolationLevel iso, SqlInternalTransaction internalTransaction, Boolean isDelegateControlRequest)     
at System.Data.SqlClient.SqlDelegatedTransaction.Promote()     --- End of inner exception stack trace ---     
at System.Data.SqlClient.SqlDelegatedTransaction.Promote()     
at System.Transactions.TransactionStatePSPEOperation.PSPEPromote(InternalTransaction tx)     
at System.Transactions.TransactionStateDelegatedBase.EnterState(InternalTransaction tx)     
--- End of inner exception stack trace ---     
at System.Transactions.TransactionStateAborted.CreateAbortingClone(InternalTransaction tx)     
at System.Transactions.DependentTransaction..ctor(IsolationLevel isoLevel, InternalTransaction internalTransaction, Boolean blocking)     
at System.Transactions.Transaction.DependentClone(DependentCloneOption cloneOption)     
at System.Transactions.TransactionScope.SetCurrent(Transaction newCurrent)     
at System.Transactions.TransactionScope.PushScope()     
at System.Transactions.TransactionScope..ctor(TransactionScopeOption scopeOption)    

任何人都可以帮我找出此失败的原因吗？

Answer 1

如果您使用 TransactionScope 并且：

• 打开多个数据库连接并
• 连接到 SQL Server 2005 服务器，

则该事务将升级为 DTC。检查另一个问题：TransactionScope 在某些计算机上自动升级到 MSDTC？< /a>

解决方案是：

• 使用 SQL Server 2008 或

• 使用 SqlTransaction 而不是 TransactionScope，就像前面的答案所建议的那样：

  using (var conn = new SqlConnection(connectionString))
  {  
      使用 (var tx = conn.BeginTransaction())
      {
          第一个方法(conn);
          第二方法(conn);
          tx.Commit();
      }
  }
  

Answer 2

我可以向您提出更好的方法来实现您的目标。
每个连接应该有一个事务用于 2 个数据库调用。

它应该像

using (SqlConnection conn1 = new SqlConnection("Data Source=(local);Initial Catalog=Northwind;Integrated Security=SSPI"))
{ 
    using (conn1.BeginTransaction()
    {
        try
        {
            FirstMethod(Conn1);
            SecondMethod(Conn2);
        }
        catch()
        {
        }
    }
}