Bind an ObservableCollection to a wpf datagrid : Grid stays empty

Question

I would like to bind an ObservableCollection to wpf datagrid. My ObservableCollection is not empty, but, my datagrid stay empty :

public partial class Fenetre_EvtCode : Window
{
    ObservableCollection<EvtCode> glb_ObservableEvtCode;

    public Fenetre_EvtCode()
    {
        InitializeComponent();

        EvtCode myEvt = new EvtCode();
        glb_ObservableEvtCode   =   myEvt.GetAllEvtCode();
    }
}

Here is my xaml:

<DataGrid Foreground="Aqua" 
          Name="myDataGridEvtCode" 
          AutoGenerateColumns="True"  
          HorizontalAlignment="Stretch" 
          Margin="0,0,0,0" 
          VerticalAlignment="Stretch" 
          Height="453" 
          ItemsSource="{Binding glb_ObservableEvtCode}" />

I repeat : I looked in debug, and my ObservableCollection is not empty.

Anyone know why ma datagrid stay empty?

Answer 1

You need to bind to a public property.

public ObservableCollection<EvtCode> ObservableEvtCode
{
  get
  {
    return this.glb_ObservableEvtCode;
  }
}

And XAML:

<DataGrid  
    ... 
    DataContext="{Binding RelativeSource={RelativeSource AncestorType=Window}}"
    ItemsSource="{Binding ObservableEvtCode}" >
</DataGrid>

Edit: see also this answer