OperationContext.Current Properti

Definisi

Ruang nama:

System.ServiceModel

Rakitan:

System.ServiceModel.dll, System.ServiceModel.Primitives.dll

Paket:

System.ServiceModel.Primitives v10.0.652802

Sumber:

OperationContext.cs

Mendapatkan atau mengatur konteks eksekusi untuk utas saat ini.

public:
 static property System::ServiceModel::OperationContext ^ Current { System::ServiceModel::OperationContext ^ get(); void set(System::ServiceModel::OperationContext ^ value); };

public static System.ServiceModel.OperationContext Current { get; set; }

static member Current : System.ServiceModel.OperationContext with get, set

Public Shared Property Current As OperationContext

Nilai Properti

OperationContext

OperationContext yang mewakili konteks olahpesan dan eksekusi metode saat ini.

Contoh

Contoh kode berikut menggunakan Current properti dan GetCallbackChannel metode untuk membuat saluran kembali ke pemanggil dari dalam metode . Semua metode dalam contoh ini adalah metode satu arah, memungkinkan layanan dan klien untuk berkomunikasi di kedua arah secara independen. Dalam hal ini, contoh aplikasi klien hanya mengharapkan satu panggilan pengembalian sebelum keluar, tetapi klien lain, misalnya klien Windows Forms, dapat menerima sejumlah panggilan dari layanan.

using System;
using System.Collections.Generic;
using System.ServiceModel;
using System.Threading;

namespace Microsoft.WCF.Documentation
{
  [ServiceContract(
    Name = "SampleDuplexHello",
    Namespace = "http://microsoft.wcf.documentation",
    CallbackContract = typeof(IHelloCallbackContract),
    SessionMode = SessionMode.Required
  )]
  public interface IDuplexHello
  {
    [OperationContract(IsOneWay = true)]
    void Hello(string greeting);
  }

  public interface IHelloCallbackContract
  {
    [OperationContract(IsOneWay = true)]
    void Reply(string responseToGreeting);
  }

  public class DuplexHello : IDuplexHello
  {
    public DuplexHello()
    {
      Console.WriteLine("Service object created: " + this.GetHashCode().ToString());
    }

    ~DuplexHello()
    {
      Console.WriteLine("Service object destroyed: " + this.GetHashCode().ToString());
    }

    public void Hello(string greeting)
    {
      Console.WriteLine("Caller sent: " + greeting);
      Console.WriteLine("Session ID: " + OperationContext.Current.SessionId);
      Console.WriteLine("Waiting two seconds before returning call.");
      // Put a slight delay to demonstrate asynchronous behavior on client.
      Thread.Sleep(2000);
      IHelloCallbackContract callerProxy
        = OperationContext.Current.GetCallbackChannel<IHelloCallbackContract>();
      string response = "Service object " + this.GetHashCode().ToString() + " received: " + greeting;
      Console.WriteLine("Sending back: " + response);
      callerProxy.Reply(response);
    }
  }
}

Imports System.Collections.Generic
Imports System.ServiceModel
Imports System.Threading

Namespace Microsoft.WCF.Documentation
    <ServiceContract(Name:="SampleDuplexHello", Namespace:="http://microsoft.wcf.documentation", _
                     CallbackContract:=GetType(IHelloCallbackContract), SessionMode:=SessionMode.Required)> _
  Public Interface IDuplexHello
        <OperationContract(IsOneWay:=True)> _
        Sub Hello(ByVal greeting As String)
    End Interface

  Public Interface IHelloCallbackContract
    <OperationContract(IsOneWay := True)> _
    Sub Reply(ByVal responseToGreeting As String)
  End Interface

  Public Class DuplexHello
      Implements IDuplexHello
    Public Sub New()
      Console.WriteLine("Service object created: " & Me.GetHashCode().ToString())
    End Sub

    Protected Overrides Sub Finalize()
      Console.WriteLine("Service object destroyed: " & Me.GetHashCode().ToString())
    End Sub

    Public Sub Hello(ByVal greeting As String) Implements IDuplexHello.Hello
      Console.WriteLine("Caller sent: " & greeting)
      Console.WriteLine("Session ID: " & OperationContext.Current.SessionId)
      Console.WriteLine("Waiting two seconds before returning call.")
      ' Put a slight delay to demonstrate asynchronous behavior on client.
      Thread.Sleep(2000)
            Dim callerProxy = OperationContext.Current.GetCallbackChannel(Of IHelloCallbackContract)()
            Dim response = "Service object " & Me.GetHashCode().ToString() & " received: " & greeting
      Console.WriteLine("Sending back: " & response)
      callerProxy.Reply(response)
    End Sub
  End Class
End Namespace

Keterangan

Current Gunakan properti untuk mendapatkan konteks eksekusi dan pesan untuk metode saat ini.