Transaction.DependentClone Method (DependentCloneOption)


Creates a dependent clone of the transaction.

Namespace:   System.Transactions
Assembly:  System.Transactions (in System.Transactions.dll)

public DependentTransaction DependentClone(
	DependentCloneOption cloneOption


Type: System.Transactions.DependentCloneOption

A DependentCloneOption that controls what kind of dependent transaction to create.

Return Value

Type: System.Transactions.DependentTransaction

A DependentTransaction that represents the dependent clone.

A dependent transaction is a transaction whose outcome depends on the outcome of the transaction from which it was cloned.

The cloneoption parameter controls what kind of dependent transaction to create. 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. If it is created with RollbackIfNotComplete, it automatically aborts the transaction if Commit is called before Complete is called on the DependentTransaction.

The following example shows you how to create a dependent transaction.

static void Main(string[] args)
		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();

				if ((c.KeyChar == 'Y') || (c.KeyChar == 'y'))
					//Call complete on the scope
				else if ((c.KeyChar == 'N') || (c.KeyChar == 'n'))

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


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

	//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

	//Call complete on the dependent transaction

.NET Framework
Available since 2.0

Transaction Class
System.Transactions Namespace
Manage Concurrency with DependentTransaction

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