CallbackBehaviorAttribute.ValidateMustUnderstand Proprietà

Definizione

Ottiene o imposta un valore che specifica se il sistema o l'applicazione applica l'elaborazione dell'intestazione MustUnderstand SOAP.Gets or sets a value that specifies whether the system or the application enforces SOAP MustUnderstand header processing.

public:
 property bool ValidateMustUnderstand { bool get(); void set(bool value); };
public bool ValidateMustUnderstand { get; set; }
member this.ValidateMustUnderstand : bool with get, set
Public Property ValidateMustUnderstand As Boolean

Valore della proprietà

true se il sistema deve eseguire l'elaborazione dell'intestazione MustUnderstand SOAP. In caso contrario false, che indica che l'applicazione esegue questa elaborazione.true if the system is to perform SOAP header MustUnderstand processing; otherwise false, which indicates that the application performs this processing. Il valore predefinito è true.The default value is true.

Esempi

Nell'esempio di codice seguente vengono illustrati CallbackBehaviorAttribute su un oggetto callback che utilizza l'oggetto SynchronizationContext per determinare il thread su cui effettuare il marshalling, la proprietà ValidateMustUnderstand per applicare la convalida del messaggio e la proprietà IncludeExceptionDetailInFaults per restituire eccezioni come oggetti FaultException al servizio a scopo di debug.The following code example shows a CallbackBehaviorAttribute on a callback object that uses the SynchronizationContext object to determine which thread to marshal to, the ValidateMustUnderstand property to enforce message validation, and the IncludeExceptionDetailInFaults property to return exceptions as FaultException objects to the service for debugging purposes.

using System;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.Threading;

namespace Microsoft.WCF.Documentation
{
  [CallbackBehaviorAttribute(
   IncludeExceptionDetailInFaults= true, 
    UseSynchronizationContext=true,
    ValidateMustUnderstand=true
  )]
  public class Client : SampleDuplexHelloCallback
  {
    AutoResetEvent waitHandle;

    public Client()
    {
      waitHandle = new AutoResetEvent(false);
    }

    public void Run()
    {
      // Picks up configuration from the configuration file.
      SampleDuplexHelloClient wcfClient
        = new SampleDuplexHelloClient(new InstanceContext(this), "WSDualHttpBinding_SampleDuplexHello");
      try
      {
        Console.ForegroundColor = ConsoleColor.White;
        Console.WriteLine("Enter a greeting to send and press ENTER: ");
        Console.Write(">>> ");
        Console.ForegroundColor = ConsoleColor.Green;
        string greeting = Console.ReadLine();
        Console.ForegroundColor = ConsoleColor.White;
        Console.WriteLine("Called service with: \r\n\t" + greeting);
        wcfClient.Hello(greeting);
        Console.WriteLine("Execution passes service call and moves to the WaitHandle.");
        this.waitHandle.WaitOne();
        Console.ForegroundColor = ConsoleColor.Blue;
        Console.WriteLine("Set was called.");
        Console.Write("Press ");
        Console.ForegroundColor = ConsoleColor.Red;
        Console.Write("ENTER");
        Console.ForegroundColor = ConsoleColor.Blue;
        Console.Write(" to exit...");
        Console.ReadLine();
      }
      catch (TimeoutException timeProblem)
      {
        Console.WriteLine("The service operation timed out. " + timeProblem.Message);
        Console.ReadLine();
      }
      catch (CommunicationException commProblem)
      {
        Console.WriteLine("There was a communication problem. " + commProblem.Message);
        Console.ReadLine();
      }
    }
    public static void Main()
    {
      Client client = new Client();
      client.Run();
    }

    public void Reply(string response)
    {
      Console.WriteLine("Received output.");
      Console.WriteLine("\r\n\t" + response);
      this.waitHandle.Set();
    }
  }
}

Imports System.ServiceModel
Imports System.ServiceModel.Channels
Imports System.Threading

Namespace Microsoft.WCF.Documentation
  <CallbackBehaviorAttribute(IncludeExceptionDetailInFaults:= True, UseSynchronizationContext:=True, ValidateMustUnderstand:=True)> _
  Public Class Client
      Implements SampleDuplexHelloCallback
    Private waitHandle As AutoResetEvent

    Public Sub New()
      waitHandle = New AutoResetEvent(False)
    End Sub

    Public Sub Run()
      ' Picks up configuration from the configuration file.
      Dim wcfClient As New SampleDuplexHelloClient(New InstanceContext(Me), "WSDualHttpBinding_SampleDuplexHello")
      Try
        Console.ForegroundColor = ConsoleColor.White
        Console.WriteLine("Enter a greeting to send and press ENTER: ")
        Console.Write(">>> ")
        Console.ForegroundColor = ConsoleColor.Green
        Dim greeting As String = Console.ReadLine()
        Console.ForegroundColor = ConsoleColor.White
        Console.WriteLine("Called service with: " & Constants.vbCrLf & Constants.vbTab & greeting)
        wcfClient.Hello(greeting)
        Console.WriteLine("Execution passes service call and moves to the WaitHandle.")
        Me.waitHandle.WaitOne()
        Console.ForegroundColor = ConsoleColor.Blue
        Console.WriteLine("Set was called.")
        Console.Write("Press ")
        Console.ForegroundColor = ConsoleColor.Red
        Console.Write("ENTER")
        Console.ForegroundColor = ConsoleColor.Blue
        Console.Write(" to exit...")
        Console.ReadLine()
      Catch timeProblem As TimeoutException
        Console.WriteLine("The service operation timed out. " & timeProblem.Message)
        Console.ReadLine()
      Catch commProblem As CommunicationException
        Console.WriteLine("There was a communication problem. " & commProblem.Message)
        Console.ReadLine()
      End Try
    End Sub
    Public Shared Sub Main()
      Dim client As New Client()
      client.Run()
    End Sub

    Public Sub Reply(ByVal response As String) Implements SampleDuplexHelloCallback.Reply
      Console.WriteLine("Received output.")
      Console.WriteLine(Constants.vbCrLf & Constants.vbTab & response)
      Me.waitHandle.Set()
    End Sub
  End Class
End Namespace

Commenti

Utilizzare la proprietà ValidateMustUnderstand per disattivare la convalida obbligatoria delle intestazioni dei messaggi in entrata.Use the ValidateMustUnderstand property to turn off the enforced validation of arriving message headers. In condizioni normali, le intestazioni dei messaggi vengono confrontate con la proprietà UnderstoodHeaders per verificare che le intestazioni in entrata vengano gestite in modo esplicito dal runtime dell'oggetto callback.In normal execution, message headers are compared against the UnderstoodHeaders property to confirm that arriving headers are explicitly handled by the callback object runtime. Impostare questa proprietà su false per disabilitare questo controllo.Set this to false to disable this checking. Se viene impostata su false, l'applicazione deve controllare le intestazioni contrassegnate con MustUnderstand = "true" e restituire un errore se una o più intestazioni non vengono riconosciute.When set to false, the application must check for headers marked with MustUnderstand="true" and return a fault if one or more of them were not understood. Questo sistema è utile quando il callback deve accettare tutti i messaggi SOAP in ingresso (ad esempio, in caso di messaggi tipizzati o non tipizzati) ed eseguire l'elaborazione dell'intestazione personalizzata.This is useful when the callback is supposed to accept any incoming SOAP messages (for example, when using typed or untyped messages) and perform custom header processing.

Si applica a