DependentCloneOption DependentCloneOption DependentCloneOption DependentCloneOption Enum

Определение

Определяет тип зависимой транзакции, которую требуется создать.Controls what kind of dependent transaction to create.

public enum class DependentCloneOption
public enum DependentCloneOption
type DependentCloneOption = 
Public Enum DependentCloneOption
Наследование
DependentCloneOptionDependentCloneOptionDependentCloneOptionDependentCloneOption

Поля

BlockCommitUntilComplete BlockCommitUntilComplete BlockCommitUntilComplete BlockCommitUntilComplete 0

Зависимая транзакция блокирует процесс фиксации транзакции, пока не истечет тайм-аут родительской транзакции, или не будет вызван метод Complete().The dependent transaction blocks the commit process of the transaction until the parent transaction times out, or Complete() is called. В этом случае могут быть выполнены дополнительные операции по транзакции и созданы новые зачисления.In this case, additional work can be done on the transaction and new enlistments can be created.

RollbackIfNotComplete RollbackIfNotComplete RollbackIfNotComplete RollbackIfNotComplete 1

Зависимая транзакция автоматически прерывает транзакцию, если для родительской транзакции до вызова метода Complete() вызывается метод Commit.The dependent transaction automatically aborts the transaction if Commit is called on the parent transaction before Complete() is called.

Примеры

Следующий пример показывает, как создать зависимую транзакцию.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

Комментарии

Зависимую транзакцию можно получить с помощью DependentClone метод, с помощью DependentCloneOption параметр Управление какого рода зависимой транзакции.A dependent transaction can be obtained using the DependentClone method, with the DependentCloneOption parameter controlling what kind of dependent transaction to create. Дополнительные сведения о том, как это перечисление используется, см. в разделе управление параллелизмом с помощью класса DependentTransaction.For more information on how this enumeration is used, see Managing Concurrency with DependentTransaction.

Применяется к

Дополнительно