Question

I am pulling my hair out over this one.

I have a WCF interface for calls on a web server. All the other functions are working fine, but the new function I added is resulting in “The remote server returned an error: NotFound.” in the Reference.cs auto generated file in the End function.

I know the server is found, I have the debugger breaking on the service side and its clearly being called and returning the correct type.

What else could cause this misleading error?

[ServiceContract]
public interface IDatabaseQueries
{
...
    [OperationContract(AsyncPattern = true)]
    IAsyncResult BeginGetItemFromId(int itemID, AsyncCallback callback, Object state);

    RmaItem EndGetItemFromId(IAsyncResult result);
...
}

[DataContract]
[KnownType(typeof(ItemType))]
[KnownType(typeof(Location))]
[KnownType(typeof(DateTime))]
public class RmaItem
{
...
}

[SilverlightFaultBehavior]
[AspNetCompatibilityRequirements(RequirementsMode = AspNetCompatibilityRequirementsMode.Allowed)]
[KnownType(typeof(RmaItem))]
[KnownType(typeof(RmaReport))]
public class DatabaseService : IDatabaseQueries
{
...
public IAsyncResult BeginGetItemFromId(int itemID, AsyncCallback callback, Object state)
{
    return new DatabaseResponse(itemID);
}

public RmaItem EndGetItemFromId(IAsyncResult result)
{
    return GetRmaItemById((int)(result as DatabaseResponse).GetData);
}
...
}

Crashing in “Reference.cs”:

public RMA.DatabaseServiceReference.RmaItem EndGetItemFromId(System.IAsyncResult result) {
                object[] _args = new object[0];
                RMA.DatabaseServiceReference.RmaItem _result = ((RMA.DatabaseServiceReference.RmaItem)(base.EndInvoke("GetItemFromId", _args, result)));
                return _result;

Edit:

When I say all other functions I mean additional functions is the same IDatabaseQueries interface.

EDIT 2::

Turns out the problem was using a Enum as a field (ItemType). As shown above, I have ItemType as a known type. Is there a special condition I am missing on that type? Here is the deceleration.

[DataContract]
public enum ItemType
{
    LOCATION, PART, ASSEMBLY
}

Answer 1

Resolved.

I was missing the EnumMember with each value in the ItemType enumaration.

    [DataContract]
    public enum ItemType
    {
        [EnumMember]
        LOCATION,
        [EnumMember]
        PART,
        [EnumMember]
        ASSEMBLY
    }

Thank you for the response McAden