What CutureInfo does binding use when StringFormat is specified?

Question

Here is a binding expression I have

<TextBlock Text={Binding MyDateProp, StringFormat=d} />

My machine default culture is en-GB. In App.xaml.cs I override OnStartup method like below

protected override void OnStartup(StartupEventArgs e)
{
        var newCulture = new CultureInfo("ru-RU", true);
        newCulture.DateTimeFormat.ShortDatePattern = "dd MMM yyyy";
        Thread.CurrentThread.CurrentCulture = newCulture;
        base.OnStartup(e);
}

I would like text to look like 01 Янв 2001 but it still shows me 1/1/2001. What culture does binding use and how can I force it to use the culture I want?

@RohitVats `DateTime` of course – Demarsch Mar 16 '15 at 00:19 — Demarsch, Mar 16 '15 at 00:19

score 2 · Accepted Answer · edited May 23 '17 at 12:12

2

I had the same problem some time ago with WPF controls ignoring culture. Did you already try changing the following:

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

Here is a question that talks about it further

Also you have StringFormat of d which is the default short date format. Looks like Windows defaults to dd.MM.yyyy for ru-RU short date. For this you have two options.

Change the shortdate format for you whole application by specifying the shortdateformat onstartup like your doing.

 newCulture.DateTimeFormat.ShortDatePattern = "dd MMM yyyy";

Or changing the date format also on each control for example:

<TextBlock Text={Binding MyDateProp, StringFormat={}{0:dd MMM yyyy} />

In your binding. If you specify stringformat you will have to do this on every control you want that date format. So it depends on what your application needs are.

edited May 23 '17 at 12:12

Community

1
1

answered Mar 16 '15 at 00:07

kmcnamee

5,097
2
25
36

Now I did it but looks like it is now using pure 'ru-RU' CultureInfo without my fix for ShortDatePattern – Demarsch Mar 16 '15 at 00:14
you have d as the stringformat specifier which will show up as the default short date format now that the control is picking up the Russian culture. D is the long date format. – kmcnamee Mar 16 '15 at 00:26
yes, I will use it that way. However I wonder if I can set up ShortDateFormat on a CultureInfo level so I don't need to specify exact format every time – Demarsch Mar 16 '15 at 10:22
yes specifying shortdatepattern at culturelevel will be a one and done type thing. It depends on if you need this short date in all your controls in your application or just one... – kmcnamee Mar 16 '15 at 10:48

score 1 · Answer 2 · answered Mar 16 '15 at 00:21

1

Since Text property is of type DateTime, textBlock will internally call ToString() on binded property. So, what you have to do is to set ConverterCulture property of binding.

<TextBlock xmlns:g="clr-namespace:System.Globalization;assembly=mscorlib"
           Text="{Binding MyDateProp, StringFormat=d,
                          ConverterCulture={x:Static g:CultureInfo.CurrentCulture}}"/>

answered Mar 16 '15 at 00:21

Rohit Vats

79,502
12
161
185

Will it catch the changes to the CultureInfo I introduced? I don't have access to VS right now so I can't check it – Demarsch Mar 16 '15 at 10:23
1

Yes it will. It will pick it from `CultureInfo.CurrentCulture` which you have already set. – Rohit Vats Mar 16 '15 at 12:48

What CutureInfo does binding use when StringFormat is specified?

2 Answers2