Question

Possible Duplicate:
Passing Interface in a WCF Service?

I’ve a problem regarding WCF and interfaces.

I’ve have two classes

public interface ICompany {
  string Name { get; set; }
  IAddress Address { get; set; }
}
class Company : ICompany {
  public string Name { get; set; }
  public IAddress Address { get; set; }
}
public interface IAddress {
  string Road { get; set; }
}
class Address: IAddress {
  string Road { get; set; }
}

And my service returns

[OperationContract]
    Company GetCompany(String name);

But this doesn’t work, I’m sure the problem is the IAddress inside the Company class, but can’t this be solved somehow?

Answer 1

Your classes must declare as:

[DataContract]
class Company {
  [DataMember]
  public string Name { get; set; }
  [DataMember]
  public IAddress Address { get; set; }
}

and your service declare and implement as:

[ServiceContract]
public interface ICompanyService
{
   [OperationContract]
   Company GetCompany(string name);
}

public class CompanyService : ICompanyService
{
  public Company GetCompany(string name)
  {
     return new Company { Name = name};
  }
}

Only after that you can use this service.
And I recommend to read more that