HttpRequestMessageProperty.Method 屬性

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

屬性值

HTTP 請求的 HTTP 動詞。

例外狀況

範例

以下程式碼會從訊息中取得該類別的實例，並根據此特性派遣至不同的方法。

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

備註

預設情況下，WCF 使用 POST 動詞來表示 HTTP 訊息。 GET 動詞是 WCF 在存取 ServiceHost 基址時用來顯示幫助資訊的。 這對於在使用網頁瀏覽器時檢查 WCF 服務是否啟用非常有用。 HTTP RFC 定義的其他方法包括 PUT、DELETE、HEAD、OPTIONS、TRACE 和 CONNECT。 這些方法在與其他服務互通時具有特殊行為。