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WPF default binding format culture

, 20 Aug 2012 CPOL
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WPF formats non-string objects to a string using a fixed/hardcoded culture (en-US) regardless of the current culture (as in Thread.CurrentThread.CurrentCulture / CultureInfo.CurrentCulture). Suppose you have a simple DataContext (ViewModel) like so : Binding an instance of `Data` to a view, …R

WPF formats non-string objects to a string using a fixed/hardcoded culture (en-US) regardless of the current culture (as in Thread.CurrentThread.CurrentCulture / CultureInfo.CurrentCulture).

Suppose you have a simple DataContext (ViewModel) like so :

public class Data
{
    public DateTime Now
    {
        get
        {
             return DateTime.Now;
        }
    }

    public string NowText
    {
        get
        {
              return DateTime.Now.ToString();
        }
    }
}

Binding an instance of `Data` to a view, with two TextBlocks each of which using ‘Now’ and ‘NowText’ respectively will yield different results if your CurrentCulture is NOT en-US.

Working on an internationalizable WPF app I’ve found out this sad truth. I don’t fully understand why this happens but I’ve found a way to “fix it”.

Somewhere before any piece of UI is shown on the screen (for example in App.xaml.cs in ApplicationStartup) just place this little piece of code :

FrameworkElement.LanguageProperty.OverrideMetadata(
  typeof(FrameworkElement),
  new FrameworkPropertyMetadata(XmlLanguage.GetLanguage(CultureInfo.CurrentCulture.IetfLanguageTag)));

It sets for any FrameworkElement (TextBlock and Label are included) the formatting culture to the current culture. Of course you might need to change it again if the current culture changes (for example an on-the-fly UI language changes).


License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Andrei Ion Rînea
Software Developer (Senior) IBM, Business Analytics
Romania Romania
No Biography provided

Comments and Discussions

 
GeneralMy vote of 5 PinmemberMember 940456016-May-13 3:27 
GeneralMy vote of 4 PinmemberAdam Wojnar6-Oct-12 10:03 
GeneralRe: My vote of 4 PinmemberAndrei Rinea6-Oct-12 22:47 
QuestionAlmost... PinmemberRichard Deeming31-Aug-12 3:54 

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