OperationBehaviorAttribute.TransactionScopeRequired Properti

Definisi

Ruang nama:

System.ServiceModel

Rakitan:

System.ServiceModel.dll

Mendapatkan atau menetapkan nilai yang menunjukkan apakah metode memerlukan cakupan transaksi untuk eksekusinya.

public:
 property bool TransactionScopeRequired { bool get(); void set(bool value); };

public bool TransactionScopeRequired { get; set; }

member this.TransactionScopeRequired : bool with get, set

Public Property TransactionScopeRequired As Boolean

Nilai Properti

Boolean

true jika metode memerlukan cakupan transaksi untuk dijalankan; jika tidak, false. Defaultnya adalah false.

Contoh

Contoh kode berikut menunjukkan operasi yang dijalankan dalam transaksi terdistribusi wajib. Properti TransactionScopeRequired menunjukkan bahwa operasi dijalankan di bawah cakupan transaksi dan TransactionAutoComplete properti menunjukkan bahwa jika tidak ada pengecualian yang tidak tertangani, cakupan transaksi selesai secara otomatis. Jika pengecualian yang tidak tertangani terjadi, transaksi dibatalkan.

using System;
using System.ServiceModel;
using System.Transactions;

namespace Microsoft.WCF.Documentation
{
  [ServiceContract(Namespace="http://microsoft.wcf.documentation", SessionMode=SessionMode.Required)]
  public interface IBehaviorService
  {
    [OperationContract]
    string TxWork(string message);
  }

  // Note: To use the TransactionIsolationLevel property, you
  // must add a reference to the System.Transactions.dll assembly.
  /* The following service implementation:
   *   -- Processes messages on one thread at a time
   *   -- Creates one service object per session
   *   -- Releases the service object when the transaction commits
   */
  [ServiceBehavior(
    ConcurrencyMode=ConcurrencyMode.Single,
    InstanceContextMode=InstanceContextMode.PerSession,
    ReleaseServiceInstanceOnTransactionComplete=true
  )]
  public class BehaviorService : IBehaviorService, IDisposable
  {
    Guid myID;

    public BehaviorService()
    {
      myID = Guid.NewGuid();
      Console.WriteLine(
        "Object "
        + myID.ToString()
        + " created.");
    }

    /*
     * The following operation-level behaviors are specified:
     *   -- Always executes under a transaction scope.
     *   -- The transaction scope is completed when the operation terminates
     *       without an unhandled exception.
     */
    [OperationBehavior(
      TransactionAutoComplete = true,
      TransactionScopeRequired = true
    )]
    [TransactionFlow(TransactionFlowOption.Mandatory)]
    public string TxWork(string message)
    {
      // Do some transactable work.
      Console.WriteLine("TxWork called with: " + message);
      // Display transaction information.

      TransactionInformation info = Transaction.Current.TransactionInformation;
      Console.WriteLine("The distributed tx ID: {0}.", info.DistributedIdentifier);
      Console.WriteLine("The tx status: {0}.", info.Status);
      return String.Format("Hello. This was object {0}.",myID.ToString()) ;
    }

    public void Dispose()
    {
      Console.WriteLine(
        "Service "
        + myID.ToString()
        + " is being recycled."
      );
    }
  }
}

Imports System.ServiceModel
Imports System.Transactions

Namespace Microsoft.WCF.Documentation
  <ServiceContract(Namespace:="http://microsoft.wcf.documentation", SessionMode:=SessionMode.Required)> _
  Public Interface IBehaviorService
    <OperationContract> _
    Function TxWork(ByVal message As String) As String
  End Interface

    ' Note: To use the TransactionIsolationLevel property, you 
    ' must add a reference to the System.Transactions.dll assembly.
    ' The following service implementation:
    '   *   -- Processes messages on one thread at a time
    '   *   -- Creates one service object per session
    '   *   -- Releases the service object when the transaction commits

    <ServiceBehavior(ConcurrencyMode:=ConcurrencyMode.Single, InstanceContextMode:=InstanceContextMode.PerSession, _
                     ReleaseServiceInstanceOnTransactionComplete:=True)> _
    Public Class BehaviorService
        Implements IBehaviorService, IDisposable
        Private myID As Guid

        Public Sub New()
            myID = Guid.NewGuid()
            Console.WriteLine("Object " & myID.ToString() & " created.")
        End Sub

        '    
        '     * The following operation-level behaviors are specified:
        '     *   -- Always executes under a transaction scope.
        '     *   -- The transaction scope is completed when the operation terminates 
        '     *       without an unhandled exception.
        '     
        <OperationBehavior(TransactionAutoComplete:=True, TransactionScopeRequired:=True), _
        TransactionFlow(TransactionFlowOption.Mandatory)> _
        Public Function TxWork(ByVal message As String) As String Implements IBehaviorService.TxWork
            ' Do some transactable work.
            Console.WriteLine("TxWork called with: " & message)
            ' Display transaction information.

            Dim info As TransactionInformation = Transaction.Current.TransactionInformation
            Console.WriteLine("The distributed tx ID: {0}.", info.DistributedIdentifier)
            Console.WriteLine("The tx status: {0}.", info.Status)
            Return String.Format("Hello. This was object {0}.", myID.ToString())
        End Function

        Public Sub Dispose() Implements IDisposable.Dispose
            Console.WriteLine("Service " & myID.ToString() & " is being recycled.")
        End Sub
    End Class
End Namespace

Keterangan

Atur TransactionScopeRequired ke true untuk mengharuskan operasi Anda dijalankan dalam cakupan transaksi. Jika transaksi yang mengalir tersedia, operasi akan dijalankan dalam transaksi tersebut. Jika tidak tersedia, transaksi baru dibuat dan digunakan untuk eksekusi operasi. Pengikatan yang ditentukan dalam titik akhir mengontrol apakah transaksi yang mengalir didukung. Oleh karena itu, untuk mendapatkan perilaku yang tepat, Anda harus memahami interaksi antara apakah aliran transaksi diizinkan oleh pengikatan dan TransactionScopeRequired properti . Tabel berikut menunjukkan kemungkinan perilaku.

TransactionScopeRequired	Mengikat mengizinkan alur transaksi	Transaksi alur penelepon	Result
False	False	No	Metode dijalankan tanpa transaksi.
Benar	False	No	Metode membuat dan menjalankan dalam transaksi baru.
Benar atau Salah	False	Yes	Kesalahan SOAP dikembalikan untuk header transaksi.
False	Benar	Yes	Metode dijalankan tanpa transaksi.
Benar	Benar	Yes	Metode dijalankan di bawah transaksi yang dialirkan.