Is InputScope unimplemented for XAML TextBox ?

Question

The "Guidelines and checklist for text input (Metro style apps) " say that:

Numeric input

Use a TextBox control to enter or edit numbers. Set the InputScope value to InputScopeNameValue.Number.

http://msdn.microsoft.com/en-us/library/windows/apps/xaml/hh738358.aspx

However

<TextBoxInputScope="InputScopeNameValue.Number" />  gives:

WinRT information: Failed to create a 'Windows.UI.Xaml.Input.InputScope' from the text 'InputScopeNameValue.Number'. [Line: 55 "color:#0000ff;font-face:Consolas;font-size:small;">InputScope="Number"avoids the exception, as per http://msdn.microsoft.com/en-us/library/windows/apps/xaml/windows.ui.xaml.controls.textbox.inputscope.aspx#Y136

but still does not prevent letters being entered into the TextBox.

Should I assume that this is just an unimplemented feature?

Or have other people figured out how to limit the input of characters into a TextBox to be numeric?

Answer 1

@Andrew - InputScope doesn't serve as a validator, but rather just a trigger to the keyboard that would be used for the software keyboard when it comes up.  To implement validation your app would have to do this in your code.

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Tim Heuer | Program Manager, XAML | http://timheuer.com/blog | @timheuer

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Answer 2

Hmm, then the documentation is missing these concepts entirely.  Thanks for pointing me in the right direction though. 

Answer 3

I've also forwarded your feedback on the wording to the documentation team for consideration.

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Tim Heuer | Program Manager, XAML | http://timheuer.com/blog | @timheuer

(if my post has answered your question, please consider using the 'mark as answer' feature in the forums to help others)