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

[Atsushi Eno]

Hi,

It turned out the method lookup in ServiceKnownTypeAttribute was 
implemented way different from what .NET exactly expects (which is not 
documented). I did a couple of experiment and fixed our code in git.
https://github.com/mono/mono/commit/77758013

Atsushi Eno

(2011/04/13 10:10), thenextman wrote:
> 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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