How to receive event when user changes system's culture

Question

When my application run with a specified culture. Don't close the application, user changes system's culture, ex: change number decimal separator from "." to ",". How to my application can catch this event. Thanks.

Notes: C# 2.0, Windows Form.

Bonbon

Answer 1

You can handle the SystemEvents.UserPreferenceChanged event:

void SystemEvents.UserPreferenceChanged(object sender, UserPreferenceChangedEventArgs e)
{
    // Regional settings have changed
    if (e.Category == UserPreferenceCategory.Locale)
    {
        ...
    }
}

Disillusion

Thanks. But how to get new regional settings? – Bonbon

I solve my problem with the code: CultureInfo.CurrentCulture.ClearCachedData(); – Bonbon

@Lu Lu, I didn't know about that method... learn something every day ;) – Disillusion

When user change system's culture. The CultureInfo.CurrentCulture is old settings, you must call CultureInfo.CurrentCulture.ClearCachedData() to clear old settings and get new settings. – Bonbon

I ran into a problem with ClearCachedDate and found this SO that solves the problem. I had to spin up a task and return the results of the cache clear. #1371033 – Volnak

Answer 2

If you want to trach system language changes then you have SystemEvents object which contains UserPreferenceChanged event you can attach to.

Sample:

Microsoft.Win32.SystemEvents.UserPreferenceChanged += new UserPreferenceChangedEventHandler(SystemEvents_UserPreferenceChanged);

If you want to track input language changes (like changes in system try when you choose between languages), then you can use: System.Windows.Forms.InputLanguage.CurrentInputLanguage

Sample:

string inputLanguage = System.Windows.Forms.InputLanguage.CurrentInputLanguage.LayoutName;

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