Binding to an array element

Question

I\'m trying to bind a TextBlock to a specific element in an ObservableCollection. This is what I do right now:

private ObservableCollection arr         


        

Answer 1

you can use this way in my case I want to binding the visibility from an boolean array: code behind:

using System.Windows;
public static readonly DependencyProperty ButtonVisibleProperty =
        DependencyProperty.Register("ButtonVisible", typeof(BindingList), typeof(BaseWindow), new PropertyMetadata(new BindingList()));
 public BindingList ButtonVisible 
    { 
        get { return (BindingList)GetValue(BaseWindow.ButtonVisibleProperty); }
        set 
        {
            SetValue(BaseWindow.ButtonVisibleProperty, value);
            OnPropertyChanged("ButtonVisible");  
        } 
    }

and in Xaml:

Visibility=""{Binding Path=ButtonVisible[0], RelativeSource={RelativeSource AncestorType={x:Type Window}}}"

beware! the ancestorType depend of your Ancestor in my case is a window