WCF Multiple Contracts with Duplicate Method Names

Question

I have a service with several contracts.

[ServiceContract]
public partial interface IBusinessFunctionDAO {

    [OperationContract]
    BusinessFunction GetBusinessFunction(Int32 businessFunctionRefID);

    [OperationContract]
    IEnumerable<Project> GetProjects(Int32 businessFunctionRefID);
}

[ServiceContract]
public partial interface IBusinessUnitDAO {

    [OperationContract]
    BusinessUnit GetBusinessUnit(Int32 businessUnitRefID);

    [OperationContract]
    IEnumerable<Project> GetProjects(Int32 businessUnitRefID);
}

Then I explicitly implemented each of these interfaces.

public class TrackingTool : IBusinessFunctionDAO, IBusinessUnitDAO {

    BusinessFunction IBusinessFunctionDAO.GetBusinessFunction(Int32 businessFunctionRefID) {
      // implementation
    }
    IEnumerable<Project> IBusinessFunctionDAO.GetProjects(Int32 businessFunctionRefID) {
      // implementation
    }

    BusinessUnit IBusinessUnitDAO.GetBusinessUnit(Int32 businessUnitRefID) {
      // implementation
    }
    IEnumerable<Project> IBusinessUnitDAO.GetProjects(Int32 businessUnitRefID) {
      // implementation
    }
}

As you can see, I have two GetProjects (int) methods, but each of them is implemented explicitly, so it compiles just fine and works great. The problem arises when I actually run this as a service. This gives me a message that TrackingTool already contains a GetProject definition. Although true, it is part of another service contract. Doesn't WCF highlight service contracts when creating method names? Is there a way to get him to distinguish between service contracts?

My App.Config is as follows

<service name="TrackingTool">
  <endpoint address="BusinessUnit" contract="IBusinessUnitDAO" />
  <endpoint address="BusinessFunction" contract="IBusinessFunctionDAO" />
</service>

Any help would be appreciated.

Thanks Raul

Answer 1

, . WSDL :

<wsdl:message name="IBusinessUnitDAO_GetBusinessUnitProjects_InputMessage">
  <wsdl:part name="parameters" element="tns:GetBusinessUnitProjects" />
</wsdl:message>
<wsdl:message name="IBusinessFunctionDAO_GetBusinessFunctionProjects_InputMessage">
  <wsdl:part name="parameters" element="tns:GetBusinessFunctionProjects" />
</wsdl:message>

xsd, tns:, :

<xs:element name="GetBusinessUnitProjects">
  <xs:complexType>
    <xs:sequence>
      <xs:element minOccurs="0" name="businessUnitRefID" type="xs:int" />
    </xs:sequence>
  </xs:complexType>
</xs:element>

<xs:element name="GetBusinessFunctionProjects">
  <xs:complexType>
    <xs:sequence>
      <xs:element minOccurs="0" name="businessFunctionRefID" type="xs:int" />
    </xs:sequence>
  </xs:complexType>
</xs:element>

, , , , wsdl . , , , , . , . .

[ServiceContract(Namespace="Tracking/BusinessFunction")]
public partial interface IBusinessFunctionDAO {

    [OperationContract]
    BusinessFunction GetBusinessFunction(Int32 businessFunctionRefID);

    [OperationContract]
    IEnumerable<Project> GetProjects(Int32 businessFunctionRefID);
}

[ServiceContract(Namespace="Tracking/BusinessUnit")]
public partial interface IBusinessUnitDAO {

    [OperationContract]
    BusinessUnit GetBusinessUnit(Int32 businessUnitRefID);

    [OperationContract]
    IEnumerable<Project> GetProjects(Int32 businessUnitRefID);
}

WSDL, WSDL . , . WSDL :

//File: Tracking.BusinessFunction.wsdl
<wsdl:message name="IBusinessFunctionDAO_GetProjects_InputMessage">
  <wsdl:part name="parameters" element="tns:GetProjects" />
</wsdl:message>

//File: Tracking.BusinessUnit.wsdl
<wsdl:message name="IBusinessUnitDAO_GetProjects_InputMessage">
  <wsdl:part name="parameters" element="tns:GetProjects" />
</wsdl:message>

, , , . xsd, , :

//File: Tracking.BusinessFunction.xsd
<xs:element name="GetProjects">
  <xs:complexType>
    <xs:sequence>
      <xs:element minOccurs="0" name="businessFunctionRefID" type="xs:int" />
    </xs:sequence>
  </xs:complexType>
</xs:element>

//File: Tracking.BusinessUnit.xsd
<xs:element name="GetProjects">
  <xs:complexType>
    <xs:sequence>
      <xs:element minOccurs="0" name="businessUnitRefID" type="xs:int" />
    </xs:sequence>
  </xs:complexType>
</xs:element>

, , , . , WSDL, , .

Answer 2

, :

[OperationContract(Name = "YourMethodNameHere")]
IEnumerable GetProjects(Int32 businessUnitRefID);

: http://jeffbarnes.net/blog/post/2006/09/21/Overloading-Methods-in-WCF.aspx

Answer 3

Try setting the Action property in the OperationContract attribute for two methods with the same name to remove the conflict, for example

[ServiceContract]
public partial interface IBusinessFunctionDAO {

[OperationContract]
BusinessFunction GetBusinessFunction(Int32 businessFunctionRefID);

[OperationContract(Action="GetBusinessFunctionProjects")]
IEnumerable<Project> GetProjects(Int32 businessFunctionRefID);
}

[ServiceContract]
public partial interface IBusinessUnitDAO {

[OperationContract]
BusinessUnit GetBusinessUnit(Int32 businessUnitRefID);

[OperationContract(Action="GetBusinessUnitProjects")]
IEnumerable<Project> GetProjects(Int32 businessUnitRefID);
}