Emitting IL in Windows Phone 8

Question

I'm trying to create classes dynamically to import XAML binding. It's working well in WPF, but not in Windows Phone 8. Apparently, Windows Phone 8 does not support binding to a dynamic data context (it just doesn't try to invoke any of the dynamic methods and properties).

So I thought I'd go the longer route, and emit classes dynamically. Unfortunately, I couldn't find any way to emit IL in Windows Phone 8. The System.Reflection.Emit namespace exists, but contains no emitter helper classe. System.AppDomain doesn't exist at all, so I can't create a new assembly to place my newly generated classes in.

I noticed DynamicMethod is supported, but I need to generate entire classes, not just an anonymous method here and there. Is IL emitting completely forbidden in Windows Phone 8?

Check [rule 3.9](http://msdn.microsoft.com/en-us/library/windows/apps/hh694083.aspx) — Hans Passant, Jul 14 '13 at 14:12
Hmmmm. I'm not going to violate the rule - There's no dynamically downloaded code, and the dynamic behavior doesn't interact with the Windows runtime. However, if Microsoft decided to enforce the rule by killing the ability to generate IL on the fly - I'm out of luck. — zmbq, Jul 14 '13 at 14:37
That doesn't make any difference, these are store certification requirements. — Hans Passant, Jul 14 '13 at 16:47

score 2 · Answer 1 · answered Jul 14 '13 at 12:30

2

Is IL emitting completely forbidden in Windows Phone 8?

Only almost. But a binding doesn't need to be dynamic in the first place. Bindings attempt to access a property of a object without knowing it's type, so even if you bound a System.Object as DataContext, you could still have {Binding SomeProperty} in your XAML.

answered Jul 14 '13 at 12:30

Claus Jørgensen

25,882
9
87
150

Indeed, but I'm trying to replace your view model with an augmented one that fires PropertyChanged and CollectionChanged events automatically. For this I need to somehow create a class that mimics your view model. – zmbq Jul 14 '13 at 13:58
@zmbq You still don't need dynamics for that, at all. – Claus Jørgensen Jul 14 '13 at 16:42
How can I dynamically create SomeProperty without doing anything dynamic? – zmbq Jul 14 '13 at 16:43
You don't have to create anything dynamically. Read my answer again. – Claus Jørgensen Jul 14 '13 at 16:46
It's not what you meant by your answer, but I think you just gave me an idea. Brilliant! – zmbq Jul 14 '13 at 16:54

Emitting IL in Windows Phone 8

1 Answers1