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Transaction.DependentClone Method

Creates a dependent clone of the transaction.

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

public DependentTransaction DependentClone(
	DependentCloneOption cloneOption
)

Parameters

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)
		{
			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();
		}

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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