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PreparingEnlistment Class

Facilitates communication between an enlisted transaction participant and the transaction manager during the Prepare phase of the transaction.

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

'Declaration
Public Class PreparingEnlistment _
	Inherits Enlistment
'Usage
Dim instance As PreparingEnlistment

During the initial (prepare) phase of the transaction, the transaction manager passes this type to the resource manager by calling the Prepare method to obtain a resource's vote on the transaction. Depending on whether it votes to commit or roll back, your implementation of the resource manager should call the Prepared or ForceRollback methods of this type.

The resource manager can also call the Done method at anytime before it has called the Prepared method. By doing so, the enlistment is casting a read only vote, meaning that it votes commit on the transaction but does not need to receive the final outcome.

Durable resource managers can retrieve the information that is be needed by the transaction manager for re-enlistment from the RecoveryInformation property. For more information on recovery, see Performing Recovery.

	Public Class EnlistmentClass
		Implements IEnlistmentNotification

		Public Sub Prepare(ByVal myPreparingEnlistment As PreparingEnlistment) Implements System.Transactions.IEnlistmentNotification.Prepare
			Console.WriteLine("Prepare notification received")

			'Perform transactional work 
	
			'If work finished correctly, reply with prepared
			myPreparingEnlistment.Prepared()
		End Sub 

		Public Sub Commit(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Commit
			Console.WriteLine("Commit notification received")

			'Do any work necessary when commit notification is received 

			'Declare done on the enlistment
			myEnlistment.Done()
		End Sub 

		Public Sub Rollback(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Rollback
			Console.WriteLine("Rollback notification received")

			'Do any work necessary when rollback notification is received 

			'Declare done on the enlistment
			myEnlistment.Done()
		End Sub 

		Public Sub InDoubt(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.InDoubt
			Console.WriteLine("In doubt notification received")

			'Do any work necessary when indout notification is received 

			'Declare done on the enlistment
			myEnlistment.Done()
		End Sub 
	End Class
	Public Class EnlistmentClass
		Implements IEnlistmentNotification

		Public Sub Prepare(ByVal myPreparingEnlistment As PreparingEnlistment) Implements System.Transactions.IEnlistmentNotification.Prepare
			Console.WriteLine("Prepare notification received")

			'Perform transactional work 
	
			'If work finished correctly, reply with prepared
			myPreparingEnlistment.Prepared()
		End Sub 

		Public Sub Commit(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Commit
			Console.WriteLine("Commit notification received")

			'Do any work necessary when commit notification is received 

			'Declare done on the enlistment
			myEnlistment.Done()
		End Sub 

		Public Sub Rollback(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.Rollback
			Console.WriteLine("Rollback notification received")

			'Do any work necessary when rollback notification is received 

			'Declare done on the enlistment
			myEnlistment.Done()
		End Sub 

		Public Sub InDoubt(ByVal myEnlistment As Enlistment) Implements System.Transactions.IEnlistmentNotification.InDoubt
			Console.WriteLine("In doubt notification received")

			'Do any work necessary when indout notification is received 

			'Declare done on the enlistment
			myEnlistment.Done()
		End Sub 
	End Class

System.Object
  System.Transactions.Enlistment
    System.Transactions.PreparingEnlistment

This type is thread safe.

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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