Method parameter is missing in WCF proxy class

Question

I have a WCF method defined as below:

[OperationContract]
Message GetSourceData(SourceDataQuery sourceDataQuery);

And actual implementation is something like this:

public Message GetSourceData(SourceDataQuery sourceDataQuery)
    {

        IEnumerable<ExportRow> sourceData = repo.GetData();

        var customBodyWriter = new CustomBodyWriter(sourceData);
        var message = Message.CreateMessage(MessageVersion.Soap11, "GetSourceData", customBodyWriter);

        return message;
    }

SourceDataQuery object:

[MessageContract]
public class SourceDataQuery
{
    [MessageBodyMember]
    public int DataSourceId { get; set; }

    [MessageBodyMember]
    public int[] FiledIds { get; set; }

    [MessageBodyMember]
    public string Filter { get; set; }

    [MessageBodyMember]
    public string Sort { get; set; }
}

My problem is when I add this WCF service to another project and create a proxy by adding a service reference, my proxy class have a GetSourceData method but its input paramater is missing. It doesnt take any parameter.. I can see that SourceDataQuery object is generated within proxy class correctly though.

Any idea why input parameter is missing?

Check the WSDL. Most likely the URL that is used to reference the service has older code i.e. the method without this parameter. — amit_g, Mar 01 '11 at 20:52
@amit_g, I've created a new project from scrath and it has the same problem. — Otake, Mar 01 '11 at 21:55
As @amit_g says, it sounds like your service is running the incorrect version. To check this, you can try rebuilding the service and publishing under a different service path. — Greg Sansom, Mar 02 '11 at 00:53
What happens if you thick/unthick Always generate message contracts in advanced settings of Add Service Reference dialog box? — Ladislav Mrnka, Mar 02 '11 at 12:23

score 3 · Accepted Answer · answered Mar 01 '11 at 20:51

3

Try using DataContract instead. It might solve your problem

[DataContract]
      public class SourceDataQuery
        {

            [DataMember]
            public int DataSourceId { get; set; }

            ....
        }

answered Mar 01 '11 at 20:51

Jean-Christophe Fortin

756
6
17

Can't use DataContract as my return type is Message which uses MessageContractAttribute. – Otake Mar 01 '11 at 21:53
@Otake http://msdn.microsoft.com/en-us/library/ms734675.aspx I haven't try but it seems to work... – Jean-Christophe Fortin Mar 01 '11 at 23:29
Thanks for your replies. I am aware that if I use Message as an input parameter and instantiate it from a SourceDataQuery object by using Message.CreateMessage it would work. I would have to change the MessageContgract attributes on SourceDataQuery to DataContract attributes though, not sure why. But what I don't understand is why SourceDataQuery as an input parameter does not work when it uses MessageContractAttribute? I have several methods and I would rather not do this conversion at my client and server. Also according to msdn it should work... – Otake Mar 02 '11 at 09:00

score 3 · Answer 2 · edited Dec 13 '11 at 15:59

3

Try to wrap the serviceclient object in the IService interface, for example write:

ServiceReference1.IService1 serviceclient = new ServiceReference1.Service1Client();

instead of

ServiceReference1.Service1Client serviceclient = new ServiceReference1.Service1Client();

edited Dec 13 '11 at 15:59

Cosmin

21,216
5
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answered Sep 08 '11 at 12:57

Mohammed el Shafaey

31
1

Method parameter is missing in WCF proxy class

2 Answers2