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

No need for the converter. You can bind directly to Arr[0] like this

The elements in Arr would need to implement INotifyPropertyChanged though in order to dynamically update.

Update: To elaborate a bit more:

public class MyDouble : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;

    private double _Value;
    public double Value 
    { 
        get { return _Value; } 
        set { _Value = value; OnPropertyChanged("Value"); }
    }

    void OnPropertyChanged(string propertyName)
    {
       var handler = PropertyChanged;
       if (handler != null)
       {
          handler(this, new PropertyChangedEventArgs(propertyName));
       }
    }
}

and then

 ObservableCollection Arr { get; set; }

and bind to