用XML調用WCF服務

Question

我正在嘗試調用WCF服務。

但是，我有請求正文作爲XML文檔。

因此，例如，而不是此

ListProductsRequest request = new ListProductsRequest(); 
request.Query = new RootQuery(); 
request.Query.Product = "milk"; 
request.Query.Group = "dairy"; 

ListProductsPortType client = new ListProductsPortTypeClient(); 
ListProductsResponse response = client.ListProducts(request); 

我想這樣做：

String xml = "<Root xmlns=\"urn:ns\"><Query><Group>dairy</Group><Product>milk</Product></Query></Root>"; 
var request = // read in to XmlReader or XmlDocument or whatever 
ListProductsPortType client = new ListProductsPortTypeClient(); 
var response = client.ListProducts(request); 

是否有使用生成的代理的方式，與具有數據層安全性的優勢，運輸爲我處理，但不使用代理對象？

感謝， 布萊希特

Answer 1

我不認爲你可以調用WCF服務，並通過你想要什麼。

方法ListProducts只接受一個ListProductsRequest對象。所以你必須創建這種對象。

String xml = "<Root xmlns=\"urn:ns\"><Query><Group>dairy</Group><Product>milk</Product></Query></Root>"; 
ListProductsRequest request = MappingObject(xml); 
ListProductsPortType client = new ListProductsPortTypeClient(); 
var response = client.ListProducts(request); 

而在Mapping方法中，您可以使用XML來創建ListproductRequest。

我不知道是否有另一種方式來做到這一點。

Answer 2

我想你可以使用

ListProductsRequest request = (ListProductsRequest) new XmlSerializer(
    typeof(ListProductsRequest)).Deserialize(); 

創建相應的對象...

Answer 3

我能走到今天，得益於2GDev的評論。代碼沒有正確處理異常或異常情況。

這樣我可以使用生成的存根的端點（從而重用配置等）

public void CallWs() 
    { 
     WsdlRDListProductsPortTypeClient client = new WsdlRDListProductsPortTypeClient(); 

     String req = "<Root xmlns=\"urn:ns\"><Query><Group>TV</Group><Product>TV</Product></Query></Root>"; 

     CallWs(client.Endpoint, "ListProducts", GetRequestXml(req)); 
    } 

    public XmlElement CallWs(ServiceEndpoint endpoint, String operation, XmlElement request) 
    { 
     String soapAction = GetSoapAction(endpoint, operation); 

     IChannelFactory<IRequestChannel> factory = null; 

     try 
     { 
      factory = endpoint.Binding.BuildChannelFactory<IRequestChannel>(); 
      factory.Open(); 
      IRequestChannel channel = null; 

      try 
      { 
       channel = factory.CreateChannel(endpoint.Address); 
       channel.Open(); 

       Message requestMsg = Message.CreateMessage(endpoint.Binding.MessageVersion, soapAction, request); 
       Message response = channel.Request(requestMsg); 
       return response.GetBody<XmlElement>(); 
      } 
      finally 
      { 
       if (channel != null) 
        channel.Close(); 
      } 
     } 
     finally 
     { 
      if (factory != null) 
       factory.Close(); 
     } 
    } 

    private String GetSoapAction(ServiceEndpoint endpoint, String operation) 
    { 

     foreach (OperationDescription opD in endpoint.Contract.Operations) 
     { 
      if (opD.Name == operation) 
      { 
       foreach (MessageDescription msgD in opD.Messages) 
        if (msgD.Direction == MessageDirection.Input) 
        { 
         return msgD.Action; 
        } 
      } 

     } 

     return null; 
    } 

當我嘗試這個來自MSDN http://msdn.microsoft.com/en-us/library/ms734712.aspx

基本ICalculator樣品，其固定用SPNego，我必須改變這一點，因爲那樣我們需要一個IRequestSessionChannel而不是一個IRequestChannel。

public XmlElement CallWs(ServiceEndpoint endpoint, String operation, XmlElement request) 
    { 
     String soapAction = GetSoapAction(endpoint, operation); 

     IChannelFactory<IRequestSessionChannel> factory = null; 

     try 
     { 


      factory = endpoint.Binding.BuildChannelFactory<IRequestSessionChannel>(); 
      factory.Open(); 
      IRequestSessionChannel channel = null; 

      try 
      { 
       channel = factory.CreateChannel(endpoint.Address); 
       channel.Open(); 

       Message requestMsg = Message.CreateMessage(endpoint.Binding.MessageVersion, soapAction, request); 

       Message response = channel.Request(requestMsg); 
       return response.GetBody<XmlElement>(); 
      } 
      finally 
      { 
       if (channel != null) 
        channel.Close(); 
      } 
     } 
     finally 
     { 
      if (factory != null) 
       factory.Close(); 
     } 
    } 

它所做的談判，和消息似乎被髮送，但不幸的是我現在得到了以下錯誤消息：

No signature message parts were specified for messages with the 'http://Microsoft.ServiceModel.Samples/ICalculator/Add' action.