Transaction.TransactionCompleted 事件

定义

指示事务已完成。Indicates that the transaction is completed.

public:
 event System::Transactions::TransactionCompletedEventHandler ^ TransactionCompleted;
public event System.Transactions.TransactionCompletedEventHandler TransactionCompleted;
member this.TransactionCompleted : System.Transactions.TransactionCompletedEventHandler 
Public Custom Event TransactionCompleted As TransactionCompletedEventHandler 

异常

尝试在已处置的事务上订阅此事件。An attempt to subscribe this event on a transaction that has been disposed.

示例

下面的示例演示应用程序如何通过订阅TransactionCompleted事件来获取事务的结果。The following sample shows how an application can obtain the outcome of a transaction by subscribing to the TransactionCompleted event.

static void Main(string[] args)
{
    try
    {
        //Create the transaction scope
        using (TransactionScope scope = new TransactionScope())
        {
            //Register for the transaction completed event for the current transaction
            Transaction.Current.TransactionCompleted += new TransactionCompletedEventHandler(Current_TransactionCompleted);

            //Call complete on the TransactionScope based on console input
            ConsoleKeyInfo c;
            while (true)
            {
                Console.Write("Complete the transaction scope? [Y|N] ");
                c = Console.ReadKey();
                Console.WriteLine();

                if ((c.KeyChar == 'Y') || (c.KeyChar == 'y'))
                {
                    scope.Complete();
                    break;
                }
                else if ((c.KeyChar == 'N') || (c.KeyChar == 'n'))
                {
                    break;
                }
            }

        }

    }
    catch (System.Transactions.TransactionException ex)
    {
        Console.WriteLine(ex);
    }
    catch
    {
        Console.WriteLine("Cannot complete transaction");
        throw;
    }
}

//Transaction completed event handler
static void Current_TransactionCompleted(object sender, TransactionEventArgs e)
{
    Console.WriteLine("A transaction has completed:");
    Console.WriteLine("ID:             {0}", e.Transaction.TransactionInformation.LocalIdentifier);
    Console.WriteLine("Distributed ID: {0}", e.Transaction.TransactionInformation.DistributedIdentifier);
    Console.WriteLine("Status:         {0}", e.Transaction.TransactionInformation.Status);
    Console.WriteLine("IsolationLevel: {0}", e.Transaction.IsolationLevel);
}
Public Shared Sub Main()
    Try
        Using scope As TransactionScope = New TransactionScope()

            'Register for the transaction completed event for the current transaction
            AddHandler Transaction.Current.TransactionCompleted, AddressOf Current_TransactionCompleted

            'Perform transactional work here.

            'Call complete on the TransactionScope based on console input
            Dim c As ConsoleKeyInfo
            While (True)

                Console.Write("Complete the transaction scope? [Y|N] ")
                c = Console.ReadKey()
                Console.WriteLine()
                If (c.KeyChar = "Y") Or (c.KeyChar = "y") Then
                    scope.Complete()
                    Exit While
                ElseIf ((c.KeyChar = "N") Or (c.KeyChar = "n")) Then
                    Exit While
                End If
                
            End While

        End Using
    Catch ex As TransactionException
        Console.WriteLine(ex)
    Catch
        Console.WriteLine("Cannot complete transaction")
        Throw
    End Try
End Sub

'Transaction completed event handler
Private Shared Sub Current_TransactionCompleted(ByVal sender As Object, ByVal e As TransactionEventArgs)
    Console.WriteLine("A transaction has completed:")
    Console.WriteLine("ID:             {0}", e.Transaction.TransactionInformation.LocalIdentifier)
    Console.WriteLine("Distributed ID: {0}", e.Transaction.TransactionInformation.DistributedIdentifier)
    Console.WriteLine("Status:         {0}", e.Transaction.TransactionInformation.Status)
    Console.WriteLine("IsolationLevel: {0}", e.Transaction.IsolationLevel)
End Sub

注解

您可以注册此事件,而不是使用可变登记来获取事务的结果信息。You can register for this event instead of using a volatile enlistment to get outcome information for transactions. 传递给TransactionCompletedEventHandler委托的参数是一个Transaction实例。The parameter passed to the TransactionCompletedEventHandler delegate is a Transaction instance. 然后,您可以查询TransactionInformation特定实例的属性以获取的实例, StatusTransactionInformation Committed实例的属性包含具有或Aborted值的事务的状态。You can then query the TransactionInformation property of the specific instance to get an instance of TransactionInformation, whose Status property contains the status of a transaction with either the Committed or Aborted value.

警告注册此事件将对其附加到的事务的性能产生负面影响。Caution Signing up for this event negatively affects the performance of the transaction it is attached to.

适用于