使用DataGrid - MVVM设置WPF ComboBoxColumn ItemSource

public class MyViewModel : INotifyPropertyChanged
{
    private ObservableCollection<string> _comboBoxItems;
    public ObservableCollection<string> ComboBoxItems
    {
        get { return _comboBoxItems; }
        set
        {
            _comboBoxItems = value;
            OnPropertyChanged(nameof(ComboBoxItems));
        }
    }

    // 实现INotifyPropertyChanged接口的代码...
}

<DataGrid ItemsSource="{Binding MyDataGridItems}" ...>
    <!-- 其他列的定义... -->
    <DataGridComboBoxColumn Header="ComboBoxColumn" SelectedItemBinding="{Binding SelectedItem}">
        <DataGridComboBoxColumn.ElementStyle>
            <Style TargetType="ComboBox">
                <Setter Property="ItemsSource" Value="{Binding DataContext.ComboBoxItems, RelativeSource={RelativeSource AncestorType={x:Type Window}}}" />
            </Style>
        </DataGridComboBoxColumn.ElementStyle>
        <DataGridComboBoxColumn.EditingElementStyle>
            <Style TargetType="ComboBox">
                <Setter Property="ItemsSource" Value="{Binding DataContext.ComboBoxItems, RelativeSource={RelativeSource AncestorType={x:Type Window}}}" />
            </Style>
        </DataGridComboBoxColumn.EditingElementStyle>
    </DataGridComboBoxColumn>
</DataGrid>