[Mono-list] WCF KnownTypes in Mono 2.10 / MonoTouch 4.0

[thenextman]

Hi

I have an application that uses WCF. It runs great on Mono 2.8.2 on Ubuntu
and .NET 3.0 on Windows.

It decorates the WCF service contract with the 'ServiceKnownType' attribute,
which points to a method returning the derived types needed to use the
server:

[ServiceKnownType("GetKnownTypes", typeof(KnownTypeProvider)]

I am porting my app to MonoTouch. I am using the latest 4.0, based on Mono
2.10.1. This no longer works: my WCF call fails because the
DataContractSerializer on the client doesn't recognise the return type.

I set a breakpoint in my 'GetKnownTypes' method and see that it is never
called. I assume that this part of System.ServiceModel is not present / not
working in MonoTouch?

I try to work around this by decorating the base return type with the
'KnownType' attribute instead.

[KnownType("GetKnownTypes")]

Again, it doesn't work and my 'GetKnownTypes' method is never called.
Looking at the source for DataContractSerializer, it seems if you use a
method name rather than specifying the type, it just gets ignored?!

I will try again by specifying the type instead of using a method (looking
at the source of DataContractSerializer, it *looks* like this will work),
however this is tricky for me in MonoTouch because I will need to use typeof
rather than Type.GetType("fully.qualified.typename").

Is there another solution? Workaround?

I did see this:
http://stackoverflow.com/questions/771560/how-do-you-configure-wcf-known-types-programmatically/2104482#2104482,
however it seems MonoTouch is missing some of the required interfaces...

Thanks in advance

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