WPF: Dynamic MarkupExtension- ReRendering/Updating of value

Question

Hey everyone,

I´m using a markupextension for loading internationalized strings in a WPF application like this:

<Button Content="{Translate MyText}"/>

My markupextension is named "TranslateExtension" and it searches a value for the key "MyText" from a database. It does this in the

ProvideValue(IServiceProvider serviceProvider)

method which returns the right string. Everything is working fine.

My problem is, that the ProvideValue-Method isn´t ever called again and there´s no way to pull a new string from the database when the language is changed. I now need a way to make the returned value "dynamic", to make the Button to reload it´s xaml and re-use the markupextension whether it´ll be through an event thrown when changing languages or whatever. How do i make the system call the ProvideValue-Method again? I tried the likes of InvalidateVisual() InvalidateArrange() InvalidateMeasure() UpdateLayout()...

I hope I made myself clear. Please feel free to ask for more information of you think you´re able to provide ideas or solutions. Thank you

Answer 1

I don't have an answer for you, but rather a suggestion...

Perhaps you could consider using a Binding combined with an IValueConverter to do the translation. Then, if the language of the user interface changes, you can simply recurse all bindings and refresh them.

Like I said, just an idea.

Answer 2

Did you get any solution to this problem ? if yes please post it...