WPF ComboBox databinding xaml vs. code

I am by no means an expert on WPF so this is probably very simple. I'm trying to bind a List to a combobox. It works in code, it doesn't work in xaml. If I remove the ItemsSource from the constructor, it doesn't work, which is how I know. I thought I had the equivalent in xaml, but apparently it's not.

xaml:

    <ComboBox Height="23"
              HorizontalAlignment="Left"
              Margin="146,76,0,0"
              Name="comboBox1"
              VerticalAlignment="Top"
              Width="120"
              ItemsSource="{Binding AvailableActions}"
              DisplayMemberPath="Name"
              SelectedValue开发者_StackOverflowPath="Name"
              SelectedValue="Replace" />

constructor:

    public MainWindow()
    {
        _availableActions = new List<IMapperAction>
                       {
                           new ReplaceAction(),
                           new CollapseAction(),
                           new NewBasedOnAction()
                       };

        InitializeComponent();
        Loaded += OnWindowLoaded;

        comboBox1.ItemsSource = AvailableActions;
    }

---

Well, you need to set the DataContext of the main window:

public MainWindow()
{
    _availableActions = new List<IMapperAction>
                   {
                       new ReplaceAction(),
                       new CollapseAction(),
                       new NewBasedOnAction()
                   };

    InitializeComponent();
    DataContext = this;
    Loaded += OnWindowLoaded;
}

---

As suggested here, you have to set the DataContext.

You can also read this link to know why and when which of the two should be used:

Why are DataContext and ItemsSource not redundant?