IParameterInspector Interfaccia

Definizione

Spazio dei nomi:

System.ServiceModel.Dispatcher

Assembly:

System.ServiceModel.Primitives.dll

Assembly:

System.ServiceModel.dll

Definisce il contratto implementato dai controlli del parametro personalizzati che consente di controllare o modificare le informazioni prima e dopo le chiamate sia sul client che sul servizio.

public interface class IParameterInspector

public interface IParameterInspector

type IParameterInspector = interface

Public Interface IParameterInspector

Esempio

Nell'esempio di codice seguente viene visualizzata un'implementazione di IParameterInspector che:

• Scrive nella console il nome e il valore restituito dell'operazione dopo che il servizio ha deserializzato una risposta o che un client ha serializzato una richiesta.

• Scrive nella console il nome dell'operazione dopo che il client ha deserializzato una risposta o che un servizio ha serializzato una richiesta.

#region IParameterInspector Members
public void AfterCall(string operationName, object[] outputs, object returnValue, object correlationState)
{
  Console.WriteLine(
    "IParameterInspector.AfterCall called for {0} with return value {1}.",
    operationName,
    returnValue.ToString()
  );
}

public object BeforeCall(string operationName, object[] inputs)
{
  Console.WriteLine("IParameterInspector.BeforeCall called for {0}.", operationName);
  return null;
}

#Region "IParameterInspector Members"
    Public Sub AfterCall(ByVal operationName As String, ByVal outputs() As Object, ByVal returnValue As Object, _
                         ByVal correlationState As Object) Implements IParameterInspector.AfterCall
        Console.WriteLine("IParameterInspector.AfterCall called for {0} with return value {1}.", _
                          operationName, returnValue.ToString())
    End Sub

    Public Function BeforeCall(ByVal operationName As String, ByVal inputs() As Object) As Object Implements _
    IParameterInspector.BeforeCall
        Console.WriteLine("IParameterInspector.BeforeCall called for {0}.", operationName)
        Return Nothing
    End Function

Nell'esempio di codice seguente viene illustrato come utilizzare System.ServiceModel.Description.IOperationBehavior, System.ServiceModel.Description.IEndpointBehavior o System.ServiceModel.Description.IServiceBehavior per inserire oggetti IParameterInspector.

using System;
using System.Collections.Generic;
using System.ServiceModel;
using System.ServiceModel.Channels;
using System.ServiceModel.Configuration;
using System.ServiceModel.Description;
using System.ServiceModel.Dispatcher;
using System.Text;

namespace Microsoft.WCF.Documentation
{
  public class InspectorInserter : BehaviorExtensionElement, IServiceBehavior, IEndpointBehavior, IOperationBehavior
  {
    #region IServiceBehavior Members
    public void AddBindingParameters(
      ServiceDescription serviceDescription,
      ServiceHostBase serviceHostBase,
      System.Collections.ObjectModel.Collection<ServiceEndpoint> endpoints,
      BindingParameterCollection bindingParameters
    )
    { return; }

    public void ApplyDispatchBehavior(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase)
    {
      foreach (ChannelDispatcher chDisp in serviceHostBase.ChannelDispatchers)
      {
        foreach (EndpointDispatcher epDisp in chDisp.Endpoints)
        {
          epDisp.DispatchRuntime.MessageInspectors.Add(new Inspector());
          foreach (DispatchOperation op in epDisp.DispatchRuntime.Operations)
            op.ParameterInspectors.Add(new Inspector());
        }
      }
    }

    public void Validate(ServiceDescription serviceDescription, ServiceHostBase serviceHostBase){ return; }

    #endregion
    #region IEndpointBehavior Members
    public void AddBindingParameters(
      ServiceEndpoint endpoint, BindingParameterCollection bindingParameters
    ) { return; }

    public void ApplyClientBehavior(ServiceEndpoint endpoint, ClientRuntime clientRuntime)
    {
      clientRuntime.MessageInspectors.Add(new Inspector());
      foreach (ClientOperation op in clientRuntime.Operations)
        op.ParameterInspectors.Add(new Inspector());
    }

    public void ApplyDispatchBehavior(ServiceEndpoint endpoint, EndpointDispatcher endpointDispatcher)
    {
      endpointDispatcher.DispatchRuntime.MessageInspectors.Add(new Inspector());
      foreach (DispatchOperation op in endpointDispatcher.DispatchRuntime.Operations)
        op.ParameterInspectors.Add(new Inspector());
    }

    public void Validate(ServiceEndpoint endpoint){ return; }
    #endregion
    #region IOperationBehavior Members
    public void AddBindingParameters(
      OperationDescription operationDescription, BindingParameterCollection bindingParameters
    )
    { return; }

    public void ApplyClientBehavior(OperationDescription operationDescription, ClientOperation clientOperation)
    {
      clientOperation.ParameterInspectors.Add(new Inspector());
    }

    public void ApplyDispatchBehavior(OperationDescription operationDescription, DispatchOperation dispatchOperation)
    {
      dispatchOperation.ParameterInspectors.Add(new Inspector());
    }

    public void Validate(OperationDescription operationDescription){ return; }

    #endregion

    public override Type BehaviorType
    {
      get { return typeof(InspectorInserter); }
    }

    protected override object CreateBehavior()
    { return new InspectorInserter(); }
  }
}

Imports System.ServiceModel
Imports System.ServiceModel.Channels
Imports System.ServiceModel.Configuration
Imports System.ServiceModel.Description
Imports System.ServiceModel.Dispatcher
Imports System.Text

Namespace Microsoft.WCF.Documentation
  Public Class InspectorInserter
      Inherits BehaviorExtensionElement
      Implements IServiceBehavior, IEndpointBehavior, IOperationBehavior
    #Region "IServiceBehavior Members"
        Public Sub AddBindingParameters(ByVal serviceDescription As ServiceDescription, _
                       ByVal serviceHostBase As ServiceHostBase, ByVal endpoints As  _
                       System.Collections.ObjectModel.Collection(Of ServiceEndpoint), _
                       ByVal bindingParameters As BindingParameterCollection) Implements IServiceBehavior.AddBindingParameters
            Return
        End Sub

        Public Sub ApplyDispatchBehavior(ByVal serviceDescription As ServiceDescription, _
                                         ByVal serviceHostBase As ServiceHostBase) Implements _
                                         IServiceBehavior.ApplyDispatchBehavior
            For Each chDisp As ChannelDispatcher In serviceHostBase.ChannelDispatchers
                For Each epDisp As EndpointDispatcher In chDisp.Endpoints
                    epDisp.DispatchRuntime.MessageInspectors.Add(New Inspector())
                    For Each op As DispatchOperation In epDisp.DispatchRuntime.Operations
                        op.ParameterInspectors.Add(New Inspector())
                    Next op
                Next epDisp
            Next chDisp
        End Sub

        Public Sub Validate(ByVal serviceDescription As ServiceDescription, ByVal serviceHostBase As ServiceHostBase) _
        Implements IServiceBehavior.Validate
            Return
        End Sub

    #End Region
    #Region "IEndpointBehavior Members"
        Public Sub AddBindingParameters(ByVal endpoint As ServiceEndpoint, ByVal bindingParameters _
                                        As BindingParameterCollection) Implements IEndpointBehavior.AddBindingParameters
            Return
        End Sub

        Public Sub ApplyClientBehavior(ByVal endpoint As ServiceEndpoint, ByVal clientRuntime As ClientRuntime) _
        Implements IEndpointBehavior.ApplyClientBehavior
            clientRuntime.MessageInspectors.Add(New Inspector())
            For Each op As ClientOperation In clientRuntime.Operations
                op.ParameterInspectors.Add(New Inspector())
            Next op
        End Sub

        Public Sub ApplyDispatchBehavior(ByVal endpoint As ServiceEndpoint, ByVal endpointDispatcher As  _
                                         EndpointDispatcher) Implements IEndpointBehavior.ApplyDispatchBehavior
            endpointDispatcher.DispatchRuntime.MessageInspectors.Add(New Inspector())
            For Each op As DispatchOperation In endpointDispatcher.DispatchRuntime.Operations
                op.ParameterInspectors.Add(New Inspector())
            Next op
        End Sub

    Public Sub Validate(ByVal endpoint As ServiceEndpoint) Implements IEndpointBehavior.Validate
        Return
    End Sub
    #End Region
    #Region "IOperationBehavior Members"
        Public Sub AddBindingParameters(ByVal operationDescription As OperationDescription, _
                                        ByVal bindingParameters As BindingParameterCollection) Implements _
                                        IOperationBehavior.AddBindingParameters
            Return
        End Sub

        Public Sub ApplyClientBehavior(ByVal operationDescription As OperationDescription, ByVal _
                                       clientOperation As ClientOperation) Implements IOperationBehavior.ApplyClientBehavior
            clientOperation.ParameterInspectors.Add(New Inspector())
        End Sub

        Public Sub ApplyDispatchBehavior(ByVal operationDescription As OperationDescription, ByVal dispatchOperation As  _
                                         DispatchOperation) Implements IOperationBehavior.ApplyDispatchBehavior
            dispatchOperation.ParameterInspectors.Add(New Inspector())
        End Sub

    Public Sub Validate(ByVal operationDescription As OperationDescription) Implements IOperationBehavior.Validate
        Return
    End Sub

    #End Region

    Public Overrides ReadOnly Property BehaviorType() As Type
      Get
          Return GetType(InspectorInserter)
      End Get
    End Property

    Protected Overrides Function CreateBehavior() As Object
        Return New InspectorInserter()
    End Function
  End Class
End Namespace

Commenti

Implementare l'interfaccia IParameterInspector per creare un controllo del parametro personalizzato che può visualizzare e modificare il contenuto di una chiamata sia prima che dopo la chiamata nelle applicazioni client o di servizio.

Nelle chiamate in uscita da un client, il controllo viene richiamato prima che il contenuto della richiesta sia serializzato e inviato al servizio. Il controllo viene chiamato anche dopo che la risposta è stata deserializzata ma prima che i valori restituiti vengano distribuiti al metodo del proxy.

Su chiamate in entrata a un servizio, il controllo viene richiamato dopo la deserializzazione dei parametri, ma prima di essere distribuiti all'operazione del servizio.

Utilizzare le proprietà ClientOperation.ParameterInspectors o DispatchOperation.ParameterInspectors per aggiungere un'implementazione IParameterInspector alla raccolta di controlli per un'operazione specifica.

Nota Gli sviluppatori e gli amministratori devono assicurarsi che l'interazione con altre IParameterInspector implementazioni sia compresa.

Metodi

AfterCall(String, Object[], Object, Object)	Metodo chiamato dopo che le chiamate del client vengono restituite e prima che le risposte del servizio vengano inviate.
BeforeCall(String, Object[])	Metodo chiamato prima che vengano inviate le chiamate del client e dopo che vengono restituite le risposte del servizio.