WPF TextBlock binding to ResourceDictionary in mutilingual

Question

I have a mutilingual wpf project. I am using ResourceDictionary to do this. For static TextBlock I can change the Text language by:

<TextBlock Text="{Binding Sample, Source={StaticResource Resources}}" />

BUT how should I change a dynamic TextBlock Text. It seems impossible to do it in this way:

<TextBlock Text="{Binding Sample}

And in the code behind:

Sample = Resources.SampleText;

If this is impossible. Is there any other options? Thanks in advance!

Answer 1

The class where the Sample property is define should implement the INotifyPropertyChanged interface and raise change notifications:

public class Translations : INotifyPropertyChanged
{
    private string _sample;
    public string Sample
    {
        get { return _sample; }
        set { _sample = value; OnPropertyChanged("Sample"); }
    }

    public event PropertyChangedEventHandler PropertyChanged;
    public void OnPropertyChanged(string propertyName)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
    }
}

Only then you will be able to update the TextBlock dynamically by simply setting the Sample source property to a new string value.