Transaction.DependentClone(DependentCloneOption) Transaction.DependentClone(DependentCloneOption) Transaction.DependentClone(DependentCloneOption) Transaction.DependentClone(DependentCloneOption) Method

Definition

Erstellt einen abhängigen Klon der Transaktion.Creates a dependent clone of the transaction.

public:
 System::Transactions::DependentTransaction ^ DependentClone(System::Transactions::DependentCloneOption option);
public System.Transactions.DependentTransaction DependentClone (System.Transactions.DependentCloneOption option);
member this.DependentClone : System.Transactions.DependentCloneOption -> System.Transactions.DependentTransaction
Public Function DependentClone (option As DependentCloneOption) As DependentTransaction

Parameter

cloneOption
DependentCloneOption DependentCloneOption DependentCloneOption DependentCloneOption

Eine DependentCloneOption, die steuert, welche Art abhängige Transaktion erstellt wird.A DependentCloneOption that controls what kind of dependent transaction to create.

Gibt zurück

Eine DependentTransaction, die den abhängigen Klon darstellt.A DependentTransaction that represents the dependent clone.

Beispiele

Im folgenden Beispiel wird gezeigt, wie eine abhängige Transaktion erstellt wird.The following example shows you how to create a dependent transaction.

static void Main(string[] args)
{
    try
    {
        using (TransactionScope scope = new TransactionScope())
        {
            // Perform transactional work here.

            //Queue work item
            ThreadPool.QueueUserWorkItem(new WaitCallback(WorkerThread), Transaction.Current.DependentClone(DependentCloneOption.BlockCommitUntilComplete));

            //Display transaction information
            Console.WriteLine("Transaction information:");
            Console.WriteLine("ID:             {0}", Transaction.Current.TransactionInformation.LocalIdentifier);
            Console.WriteLine("status:         {0}", Transaction.Current.TransactionInformation.Status);
            Console.WriteLine("isolationlevel: {0}", Transaction.Current.IsolationLevel);

            //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'))
                {
                    //Call complete on the scope
                    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;
    }
    
}

private static void WorkerThread(object transaction)
{
    //Create a DependentTransaction from the object passed to the WorkerThread
    DependentTransaction dTx = (DependentTransaction)transaction;

    //Sleep for 1 second to force the worker thread to delay
    Thread.Sleep(1000);

    //Pass the DependentTransaction to the scope, so that work done in the scope becomes part of the transaction passed to the worker thread
    using (TransactionScope ts = new TransactionScope(dTx))
    {
        //Perform transactional work here.

        //Call complete on the transaction scope
        ts.Complete();
    }

    //Call complete on the dependent transaction
    dTx.Complete();
}
Public Shared Sub Main()
    Try
        Using scope As TransactionScope = New TransactionScope()

            'Perform transactional work here.

            'Queue work item
            ThreadPool.QueueUserWorkItem(AddressOf WorkerThread, Transaction.Current.DependentClone(DependentCloneOption.BlockCommitUntilComplete))

            'Display transaction information
            Console.WriteLine("Transaction information:")
            Console.WriteLine("ID:             {0}", Transaction.Current.TransactionInformation.LocalIdentifier)
            Console.WriteLine("status:         {0}", Transaction.Current.TransactionInformation.Status)
            Console.WriteLine("isolationlevel: {0}", Transaction.Current.IsolationLevel)

            '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

Public Shared Sub WorkerThread(ByVal myTransaction As Object)

    'Create a DependentTransaction from the object passed to the WorkerThread
    Dim dTx As DependentTransaction
    dTx = CType(myTransaction, DependentTransaction)

    'Sleep for 1 second to force the worker thread to delay
    Thread.Sleep(1000)

    'Pass the DependentTransaction to the scope, so that work done in the scope becomes part of the transaction passed to the worker thread
    Using ts As TransactionScope = New TransactionScope(dTx)
        'Perform transactional work here.

        'Call complete on the transaction scope
        ts.Complete()
    End Using

    'Call complete on the dependent transaction
    dTx.Complete()
End Sub

Hinweise

Eine abhängige Transaktion ist eine Transaktion, deren Ergebnis vom Ergebnis der Transaktion abhängt, von der Sie geklont wurde.A dependent transaction is a transaction whose outcome depends on the outcome of the transaction from which it was cloned.

Der cloneoption -Parameter steuert die Art der abhängigen Transaktion, die erstellt werden soll.The cloneoption parameter controls what kind of dependent transaction to create. Wenn eine abhängige Transaktion mit BlockCommitUntilCompleteerstellt wird, blockiert Sie den Commitprozess der Transaktion, bis das Zeitlimit für die Transaktion abgelaufen ist oder Complete für DependentTransactionaufgerufen wird.If a dependent transaction is created with BlockCommitUntilComplete, it blocks the commit process of the transaction until the transaction times out, or Complete is called on the DependentTransaction. Wenn Sie RollbackIfNotCompletemit erstellt wird, wird die Transaktion automatisch abgebrochen, Commit wenn aufgerufen wird Complete , DependentTransactionbevor aufgerufen wird.If it is created with RollbackIfNotComplete, it automatically aborts the transaction if Commit is called before Complete is called on the DependentTransaction.

Gilt für:

Siehe auch