Question

I try to bind my UI to custom DependencyProperty:

<Window.Resources>
    <local:Localization x:Key="Localization" xmlns:x="#unknown" xmlns:local="#unknown"/>
</Window.Resources>
    <Grid Name="mainStack" DataContext="{StaticResource Localization}">
         <Button Padding="10,3" Margin="5" Content="{Binding BtnAdd}" Command="New"/>
    </Grid>

Also I have class “Localization”:

class Localization : DependencyObject, INotifyPropertyChanged
    {
        public static DependencyProperty BtnAddProperty;

        static Localization()
        {
            BtnAddProperty = DependencyProperty.Register("BtnAdd", typeof(string), typeof(Localization));

        }

        public string BtnAdd
        {
            set
            {
                SetValue(BtnAddProperty, value);
            }
            get
            {
                return (string)GetValue(BtnAddProperty);
            }
        }

        public event PropertyChangedEventHandler PropertyChanged;

        protected virtual void OnPropertyChanged(string propertyName)
        {
            PropertyChangedEventHandler handler = this.PropertyChanged;
            if (handler != null)
            {
                PropertyChangedEventArgs e = new PropertyChangedEventArgs(propertyName);
                handler.Invoke(this, e);
            }
        }

        public Localization()
        {
            BtnAdd = MainWindowRes.BtnAdd;
        }

        public void SwitchLanguage()
        {
            BtnAdd = MainWindowRes.BtnAdd;
            OnPropertyChanged("BtnAdd");
        }

    }

First time my UI element gets my property value. But when I use my method SwitchLanguage(), property gets new data, and UI still have first value.

Can someone help me please?

P.S.
Sorry, for my English.

Eugene

Answer 1

I tried your example, everything seems to work.
But there are some pitfalls:

• There’s a framework class called Localization, so make sure you don’t mix up!

• How do you call SwitchLanguage()? You have to call this on the right instance! (For example in the Code Behind:

  var res = (Localization)Resources[“Localization”];
  res.SwitchLanguage();