用XML调用WCF服务

Question

我正在尝试调用WCF服务。

但是，我有请求正文作为XML文档。

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); 

我想这样做：

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，与具有数据层安全性的优势，运输为我处理，但不使用代理对象？

感谢， 布莱希特

Answer 1

我不认为你可以调用WCF服务，并通过你想要什么。

方法ListProducts只接受一个ListProductsRequest对象。所以你必须创建这种对象。

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来创建ListproductRequest。

我不知道是否有另一种方式来做到这一点。

Answer 2

我想你可以使用

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

创建相应的对象...

Answer 3

我能走到今天，得益于2GDev的评论。代码没有正确处理异常或异常情况。

这样我可以使用生成的存根的端点（从而重用配置等）

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; 
    } 

当我尝试这个来自MSDN http://msdn.microsoft.com/en-us/library/ms734712.aspx

基本ICalculator样品，其固定用SPNego，我必须改变这一点，因为那样我们需要一个IRequestSessionChannel而不是一个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(); 
     } 
    } 

它所做的谈判，和消息似乎被发送，但不幸的是我现在得到了以下错误消息：

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