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Sending objects containing objects from WCF Server

Posted on 2009-12-23
Medium Priority
Last Modified: 2013-12-17

I have a WCF Server that returns a ResponseType class object that i have created. The class is shown in the code section.

When the WCF Client  invokes a WCF Server Function and the   server operation is a success
(for example  WCF server succesfully connects to the database)  ResponseObj will be  some
string data. In this scenario everything is working fine. (r_type.ResponseObj="Connection is OK")

But  when   a exception occurs at the WCF server  i catch that exception and want to inform the client about the exception. And i want to directly send the exception object to the WCF client. So i use something like this:
catch(Exception ex)
return r_type;

But  at the WCF client i get the exception : Server is in the faulted state.

In short  when the object type ResponseType is a complex object like Exception class object
instead of int or string, the system does not work.
Is there a workaround to overcome this issue ?

Note : If i add  another DataMember  like Exception ex to the ResponseType Class then i can
succesfully send the exception to the client. But I do not want to add a DataMember  for
each type of exception. By using reflection at the client (.GetType())  i can already understand
the type of the object.

I am sorry and i hope i have made myself clear.

 public class ResponseType
        private object responseObj;    
        private string additionalData;

        public object ResponseObj
            get { return responseObj; }
            set { responseObj = value; }
        public string AdditionalData
            get { return additionalData; }
            set { additionalData = value; }

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Question by:parabellum
  • 2
LVL 42

Expert Comment

by:Meir Rivkin
ID: 26112542

1. Add one more class as follows:

    public class MyFaultException
        private string _reason;
        public string Reason
            get { return _reason; }
            set { _reason = value; }

add FaultContract atteibute to your service contract interface which exposes API:

    public interface IService
        ResponseType YourFunction();

add exception handling to your wcf service class:
public class Service : IService
         public string YourFunction()
//code here
            catch (Exception exp)
                MyFaultException theFault = new MyFaultException();
                theFault.Reason = "Some Error " + exp.Message.ToString();
                throw new FaultException<MyFaultException>(theFault);

            return "No Error";

now, u can catch your fault exception to get a more details of the exception:

 static void Main(string[] args)


            string result = "";
ServiceProxy.ServiceClient client = new ServiceProxy.ServiceClient();

                result = client.YourFunction();


            catch (FaultException<ServiceProxy.MyFaultException> ee)


               result = "Exception: " + ee.Detail.Reason;

LVL 42

Accepted Solution

Meir Rivkin earned 2000 total points
ID: 26112561
u need to modify your web.config:
<?xml version="1.0" encoding="utf-8" ?>




        <behavior name="MyServiceTypeBehaviors">

              <serviceDebug includeExceptionDetailInFaults="true" /> -->THIS ONE !!!!





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