Question

I would like to bind a checkbox list to a collection of enum values in WPF.
The enum is not [Flags].

Context:
It is for filtering a datagrid, in which each item has a instance of my enum.
It doesn’t necessarily need to bind to an List, a fixed size collection of would work as well.

Answer 1

Assuming you want to bind to all possible values of your enum, you can do it with an ObjectDataProvider.
Declare this in your resources (Window.Resources or App.Resources etc.):

    <ObjectDataProvider x:Key="enumValues" MethodName="GetValues" ObjectType="{x:Type sys:Enum}">
        <ObjectDataProvider.MethodParameters>
            <x:Type TypeName="local:TestEnum"/>
        </ObjectDataProvider.MethodParameters>
    </ObjectDataProvider>

This basically represents a call to Enum.GetValues(typeof(TestEnum)) and exposes it as a data source.
Note: You need to declare the namespaces sys and local before, where sys is clr-namespace:System;assembly=mscorlib and local is the namespace of your enum.

Once you have that, you can use that ObjectDataProvider as a Binding source just like anything else, for example:

<ListBox ItemsSource="{Binding Source={StaticResource enumValues}}"/>

The non-declarative way of doing this is just assigning that in code:

someListBox.ItemsSource = Enum.GetValues(typeof(TestEnum));

For binding the selected items, unfortunately the SelectedItems property cannot be set from Xaml, but you can use the SelectionChanged event:

<ListBox Name="lb" ItemsSource="{Binding Source={StaticResource enumValues}}" SelectionMode="Multiple" SelectionChanged="lb_SelectionChanged"></ListBox>

and then set the property on your ViewModel (or whatever you use) in the event:

private void lb_SelectionChanged(object sender, SelectionChangedEventArgs e) {
    viewModel.SelectedValues = lb.SelectedItems.OfType<TestEnum>().ToList();
}