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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 Enumeration 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.

		Public Shared Sub Main()
				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()
						If (c.KeyChar = "Y") Or (c.KeyChar = "y") Then
							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("Cannot complete transaction")
			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

			'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
			End Using

			'Call complete on the dependent transaction
		End Sub

.NET Framework

Supported in: 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

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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