IParameterInspector Interface

Definição

public interface class IParameterInspector

public interface IParameterInspector

type IParameterInspector = interface

Public Interface IParameterInspector

Exemplos

O seguinte exemplo de código mostra uma IParameterInspector implementação que:

• Escreve o nome da operação e o valor de retorno na consola após uma resposta ter sido desserializada pelo serviço ou um pedido ter sido serializado por um cliente.

• Escreve o nome da operação na consola após desserializar uma resposta no cliente ou depois de uma resposta ter sido serializada no serviço.

#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

O exemplo de código seguinte mostra como usar , System.ServiceModel.Description.IOperationBehaviorSystem.ServiceModel.Description.IEndpointBehavior ou System.ServiceModel.Description.IServiceBehavior inserir IParameterInspector objetos.

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

Observações

Implemente a IParameterInspector interface para criar um inspetor de parâmetros personalizado que possa visualizar e modificar o conteúdo de uma chamada tanto antes como após a chamada em aplicações cliente ou de serviço.

Nas chamadas de saída de um cliente, o inspetor é invocado antes de o conteúdo do pedido ser serializado e enviado ao serviço. O inspetor também é chamado depois de a resposta ter sido desserializada, mas antes de os valores de retorno terem sido enviados para o método proxy.

Nas chamadas recebidas para um serviço, o inspetor é invocado após os parâmetros serem desserializados, mas antes de serem enviados para a operação do serviço.

Use as ClientOperation.ParameterInspectors propriedades ou DispatchOperation.ParameterInspectors para adicionar uma IParameterInspector implementação à coleção dos inspetores para uma operação específica.

Nota Os programadores e administradores devem garantir que a interação com outras IParameterInspector implementações é compreendida.