Invalid tooltip culture

Question

I have xaml:

<TextBlock Text="{local:Bind Test}" ToolTip="{local:Bind Test}" /> 

And here is a screenshot (using a magnifying glass):

My question is: what is going on here? Why does the tooltip show the value in different ways (decimal point . While expected)?

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Longer:

I am trying to display numbers in the same format as in the user settings of the Windows number format.

To do this, I redefine the language before displaying the window (overriding App.OnStartup):

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

And using the following custom binding (to set the default converter culture)

 public class Bind : Binding { public Bind(string path) : base(path) { ConverterCulture = CultureInfo.CurrentCulture; } } 

It works for the Text TextBox property, but it does not work for ToolTip .

To see what I show in the screenshot:

• go (Windows 7) Control Panel/Region and Language/Formats and set the Format as English (United States)
• go Additional settings/Numbers and change the Decimal symbol from . before
• create a new wpf application, copy xaml, add a language override, add a converter and install:

 public partial class MainWindow : Window { public double Test { get; set; } = 1.234567; public MainWindow() { InitializeComponent(); DataContext = this; } } 

Answer 1

I am also facing the same problem. Thus, you can solve this problem by adding a TextBlock inside the ToolTip and linking the same Text="{local:Bind Test}" for this TextBlock ToolTip.

 <TextBlock> <TextBlock.ToolTip> <TextBlock Text="{local:Bind Test}"/> </TextBlock.ToolTip> </TextBlock>