Computer Overlord

WCF and Enums : The underlying connection was closed: The connection was closed unexpectedly

Problem:

I was getting the error “The underlying connection was closed: The connection was closed unexpectedly” when retrieving an array of a complex class.

Diagnosis:

It turns out that one of the enums in the class was not declared properly and this was causing this ambiguous error.

Solution:

Thanks to Merrick Chaffer for his article that told me what my I was missing.

The service needs the enum type to be registerd as a service known type:

[ServiceContract(Namespace = "")]
[AspNetCompatibilityRequirements(RequirementsMode = 
    AspNetCompatibilityRequirementsMode.Allowed)]
[ServiceKnownType(typeof(SuitType))]
public class PokerService
{

and the Enum needs each value used to have an [EnumMember] attribute:

public enum SuitType
 {
     [EnumMember]
     Unknown = 0,
     [EnumMember]
     Club = 1,
     [EnumMember]
     Spade = 2,
     [EnumMember]
     Diamond = 3,
     [EnumMember]
     Heart = 4,
 }

7pm