I am having trouble sending a collection of Enums to a WCF service method. I used this post as a guide: Sharing Enum with WCF Service
[ServiceContract]
[ServiceKnownType(typeof(MyEnum))]
[ServiceKnownType(typeof(List<MyEnum>))]
public interface IMyService{
[OperationContract]
MyEnum ServiceMethod1( );
[OperationContract]
IList<MyEnum> ServiceMethod2( );
[OperationContract]
IList<MyEnum> ServiceMethod3( MyEnum e );
[OperationContract]
IList<MyEnum> ServiceMethod4( IList<MyEnum> e );
}
[Serializable]
[DataContract]
public enum MyEnum{
[EnumMember] red,
[EnumMember] green,
[EnumMember] blue
};
ServiceMethod1, ServiceMethod2, and ServiceMethod3 work correctly. I get the following error when attempting to send a list of Enums to ServiceMethod4.
Operation 'ServiceMethod4' in contract 'IMyService' has a query variable named 'e' of type 'System.Collections.Generic.IList`1[MyEnum]', but type 'System.Collections.Generic.IList`1[MyEnum]' is not convertible by 'QueryStringConverter'. Variables for UriTemplate query values must have types that can be converted by 'QueryStringConverter'.
Do I need to create a custom QueryStringConverter?
Thanks!
-
What does your configuration file look like? It sounds like you might be using a
webHttpBinding
element which would not supportIList<MyEnum>
as that would be impossible to represent on a URL.You should look into using a
basicHttpBinding
as this uses SOAP. Using SOAP will allow you to serializeIList<MyEnum>
and send it to yourOperationContract
.Corey Coto : I am using a `webHttpBinding` element and calling my service with a simple Get request passing the params on the query string. http://server/MyService.svc/ServiceMethod4?e=0&e=1&e=2 Why doesn't `webHttpBinding` serialize a list of enums? `webHttpBinding` will serialize a list of objects. -
Would it be acceptable to type that parameter as an array of MyEnum instead? Then inside your implementation just use var eList = new List(e); Alternatively, you could try using a KnownType helper class, as outlined here: http://msdn.microsoft.com/en-us/library/system.servicemodel.serviceknowntypeattribute.aspx
Corey Coto : I previously tried changing the type of the parameter to an array of MyEnums but the parameter still doesn't serialize. I am also using the ServiceKnownType attribute as shown in the example above but it doesn't help the situation either.
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