HttpRequestMessageProperty.Method Propiedad

Definición

Espacio de nombres:

System.ServiceModel.Channels

Ensamblado:

System.ServiceModel.Http.dll

Ensamblado:

System.ServiceModel.dll

Obtiene o establece el verbo HTTP para la solicitud HTTP.

public:
 property System::String ^ Method { System::String ^ get(); void set(System::String ^ value); };

public string Method { get; set; }

member this.Method : string with get, set

Public Property Method As String

Valor de propiedad

String

Verbo HTTP para la solicitud HTTP.

Excepciones

ArgumentNullException

El valor se establece en null.

Ejemplos

El código siguiente recibe del mensaje una instancia de esta clase y, a continuación, lo envía a diferentes métodos basados en esta propiedad.

public Message ProcessMessage(Message request)
{
    Message response = null;

    //The HTTP Method (e.g. GET) from the incoming HTTP request
    //can be found on the HttpRequestMessageProperty. The MessageProperty
    //is added by the HTTP Transport when the message is received.
    HttpRequestMessageProperty requestProperties =
        (HttpRequestMessageProperty)request.Properties[HttpRequestMessageProperty.Name];

    //Here we dispatch to different internal implementation methods
    //based on the incoming HTTP verb.
    if (requestProperties != null)
    {
        if (String.Equals("GET", requestProperties.Method,
            StringComparison.OrdinalIgnoreCase))
        {
            response = GetCustomer(request);
        }
        else if (String.Equals("POST", requestProperties.Method,
            StringComparison.OrdinalIgnoreCase))
        {
            response = UpdateCustomer(request);
        }
        else if (String.Equals("PUT", requestProperties.Method,
            StringComparison.OrdinalIgnoreCase))
        {
            response = AddCustomer(request);
        }
        else if (String.Equals("DELETE", requestProperties.Method,
            StringComparison.OrdinalIgnoreCase))
        {
            response = DeleteCustomer(request);
        }
        else
        {
            //This service doesn't implement handlers for other HTTP verbs (such as HEAD), so we
            //construct a response message and use the HttpResponseMessageProperty to
            //set the HTTP status code to 405 (Method Not Allowed) which indicates the client 
            //used an HTTP verb not supported by the server.
            response = Message.CreateMessage(MessageVersion.None, String.Empty, String.Empty);

            HttpResponseMessageProperty responseProperty = new HttpResponseMessageProperty();
            responseProperty.StatusCode = HttpStatusCode.MethodNotAllowed;

            response.Properties.Add( HttpResponseMessageProperty.Name, responseProperty );
        }
    }
    else
    {
        throw new InvalidOperationException( "This service requires the HTTP transport" );
    }

    return response;
}

Public Function ProcessMessage(ByVal request As Message) As Message Implements IUniversalContract.ProcessMessage
    Dim response As Message = Nothing

    'The HTTP Method (e.g. GET) from the incoming HTTP request
    'can be found on the HttpRequestMessageProperty. The MessageProperty
    'is added by the HTTP Transport when the message is received.
    Dim requestProperties As HttpRequestMessageProperty = CType(request.Properties(HttpRequestMessageProperty.Name), HttpRequestMessageProperty)

    'Here we dispatch to different internal implementation methods
    'based on the incoming HTTP verb.
    If requestProperties IsNot Nothing Then
        If String.Equals("GET", requestProperties.Method, StringComparison.OrdinalIgnoreCase) Then
            response = GetCustomer(request)
        ElseIf String.Equals("POST", requestProperties.Method, StringComparison.OrdinalIgnoreCase) Then
            response = UpdateCustomer(request)
        ElseIf String.Equals("PUT", requestProperties.Method, StringComparison.OrdinalIgnoreCase) Then
            response = AddCustomer(request)
        ElseIf String.Equals("DELETE", requestProperties.Method, StringComparison.OrdinalIgnoreCase) Then
            response = DeleteCustomer(request)
        Else
            'This service doesn't implement handlers for other HTTP verbs (such as HEAD), so we
            'construct a response message and use the HttpResponseMessageProperty to
            'set the HTTP status code to 405 (Method Not Allowed) which indicates the client 
            'used an HTTP verb not supported by the server.
            response = Message.CreateMessage(MessageVersion.None, String.Empty, String.Empty)

            Dim responseProperty As New HttpResponseMessageProperty()
            responseProperty.StatusCode = HttpStatusCode.MethodNotAllowed

            response.Properties.Add(HttpResponseMessageProperty.Name, responseProperty)
        End If
    Else
        Throw New InvalidOperationException("This service requires the HTTP transport")
    End If

    Return response
End Function

Comentarios

De forma predeterminada, WCF usa el verbo POST para los mensajes HTTP. WCF usa el verbo GET para mostrar información de ayuda al acceder a la dirección base de ServiceHost. Esto resulta útil para comprobar si un servicio WCF está activo cuando se usa un explorador web. Otros métodos definidos por la RFC HTTP son PUT, DELETE, HEAD, OPTIONS, TRACE y CONNECT. Estos métodos tienen comportamientos especiales al interoperar con otros servicios.