WCF Client consuming ASMX Web Service with Soap Header

Question

I have an ASMX web service that has requires a soap header and a client app consuming this service via a service reference (WCF).

Server:

[WebService(Namespace = "http://myserviceurl.org/")]
[WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
public class Service1 : System.Web.Services.WebService
{
    public MyCustomSoapHeader MyHeader;

    [WebMethod]
    [SoapHeader("MyHeader", Direction = SoapHeaderDirection.In)]
    public string MyMethod()
    {
        if(MyHeader.SomeProperty == false)
        {
             return "error";
        }
        return "success";
    }

    public class MyCustomSoapHeader: SoapHeader
    {
        public bool SomeProperty { get; set; }
    }
}

Client:

public class MyClient
{
    var address = new EndpointAddress(_myServerUrl)

    var binding = new BasicHttpBinding();
    binding.Name = "SoapBinding";
    binding.Security.Mode = BasicHttpSecurityMode.TransportCredentialOnly;
    binding.Security.Transport.ClientCredentialType = HttpClientCredentialType.Ntlm;
    binding.HostNameComparisonMode = HostNameComparisonMode.StrongWildcard;
    binding.ReceiveTimeout = TimeSpan.FromSeconds(_timeout);

    Service1SoapClient client = new Service1SoapClient(binding, address);

    string expected = client.MyMethod(new MyCustomSoapHeader(){SomeProperty = true});
}

Stack trace:

System.ServiceModel.FaultException: Server was unable to process request. ---> Computer name could not be obtained.

Server stack trace: 
   at System.ServiceModel.Channels.ServiceChannel.HandleReply(ProxyOperationRuntime operation, ProxyRpc& rpc)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs, TimeSpan timeout)
   at System.ServiceModel.Channels.ServiceChannel.Call(String action, Boolean oneway, ProxyOperationRuntime operation, Object[] ins, Object[] outs)
   at System.ServiceModel.Channels.ServiceChannelProxy.InvokeService(IMethodCallMessage methodCall, ProxyOperationRuntime operation)
   at System.ServiceModel.Channels.ServiceChannelProxy.Invoke(IMessage message)

How can I fix this on the client side still using WCF? I am unable to change the server code and I need to use WCF on the client, I can't add a web reference.

marc_s marc_s · Accepted Answer · 2010-10-01T21:05:02

Based on another question I just answered (about reading out SOAP headers), this approach should work for your requirement of including a SOAP header when calling an ASMX service from a WCF client:

Service1SoapClient client = new Service1SoapClient(binding, address);

using(OperationContextScope scope = new OperationContextScope(client.InnerChannel))
{
    // set the message in header
    MessageHeader header = MessageHeader.CreateHeader("MyHeader", "urn:Sample-NS", "Some Value");
    OperationContext.Current.OutgoingMessageHeaders.Add(header); 

    string expected = client.MyMethod(new MyCustomSoapHeader(){SomeProperty = true});
}

I hope this works - I don't really have the infrastructure at hand to test this right now...

WCF Client consuming ASMX Web Service with Soap Header

2 Answers