How to force a WPF binding to refresh? How to force a WPF binding to refresh? wpf wpf

How to force a WPF binding to refresh?


.net wpf shutdown c-sharp

You can use binding expressions:

private void ComboBox_Loaded(object sender, RoutedEventArgs e){    ((ComboBox)sender).GetBindingExpression(ComboBox.ItemsSourceProperty)                      .UpdateTarget();}

But as Blindmeis noted you can also fire change notifications, further if your collection implements INotifyCollectionChanged (for example implemented in the ObservableCollection<T>) it will synchronize so you do not need to do any of this.

.net wpf shutdown c-sharp

if you use mvvm and your itemssource is located in your vm. just call INotifyPropertyChanged for your collection property when you want to refresh.

OnPropertyChanged("YourCollectionProperty");

.net wpf shutdown c-sharp

To add my 2 cents, if you want to update your data source with the new value of your Control, you need to call UpdateSource() instead of UpdateTarget():

((TextBox)sender).GetBindingExpression(TextBox.TextProperty).UpdateSource();

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