ich meine Combobox bin Öffnen sobald es den Fokus combobox.isDropDownOpen mit bekommt ich die folgende Bindung Fehler in der Konsole bekommenComboBoxItem Fehler Bindung an Combobox Öffnung (WPF)
System.Windows.Data Error: 4 : Cannot find source for binding with reference 'RelativeSource FindAncestor, AncestorType='System.Windows.Controls.ItemsControl', AncestorLevel='1''. BindingExpression:Path=VerticalContentAlignment; DataItem=null; target element is 'ComboBoxItem' (Name=''); target property is 'VerticalContentAlignment' (type 'VerticalAlignment')
hier der Code ist:
private void combo_GotFocus(object sender, RoutedEventArgs e)
{
placeholder.Visibility = Visibility.Collapsed;
combo.IsDropDownOpen = true;
}
private void combo_LostFocus(object sender, RoutedEventArgs e)
{
if (combo.Text.Equals(""))
{
placeholder.Visibility = Visibility.Visible;
}
}