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DependentCloneOption Enumeration

Controls what kind of dependent transaction to create.

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

public enum DependentCloneOption

Member nameDescription
BlockCommitUntilCompleteThe dependent transaction blocks the commit process of the transaction until the parent transaction times out, or Complete is called. In this case, additional work can be done on the transaction and new enlistments can be created.
RollbackIfNotCompleteThe dependent transaction automatically aborts the transaction if Commit is called on the parent transaction before Complete is called.

A dependent transaction can be obtained using the DependentClone method, with the DependentCloneOption parameter controlling what kind of dependent transaction to create. For more information on how this enumeration is used, see Managing Concurrency with 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();
		}
		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();
		}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

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