Dictionaryを含むモデルのデータコレクションをバインド

　そもそもDictionaryがいけるのかな？と調査。IEnumerable> であるから、KeyValuePairオブジェクトが連続すると見て、やってみたら、一発でうまくいった。いい感じ。

Window1.xml.cs

public Window1()
{
    InitializeComponent();
    this.DataContext = new List<Model>()
    {
        new Model()
        {
            Title = "Header1",
            Attributes = new Dictionary<string, IEnumerable<string>>()
            {
                {"Key1", new List<string>{ "Value1", "Value2", "Value3", "Value4"}},
                {"Key2", new List<string>{ "Value5", "Value6"}},
                {"Key3", new List<string>{ "Value7", "Value8", "Value9"}},
            }
        },
        new Model()
        {
            Title = "Header2",
            Attributes = new Dictionary<string, IEnumerable<string>>()
            {
                {"Key4", new List<string>{ "Value1"}},
                {"Key5", new List<string>{ "Value2", "Value3", "Value4", "Value5", "Value6", "Value7"}},
                {"Key6", new List<string>{ "Value8", "Value9"}},
            }
        },
    };
}

class Model
{
    public string Title { get; set; }
    public Dictionary<string, IEnumerable<string>> Attributes { get; set; }
}

Window1.xml

<ItemsControl ItemsSource="{Binding}">
  <ItemsControl.ItemTemplate>
    <DataTemplate>
      <Expander Header="{Binding Title}">
        <ItemsControl ItemsSource="{Binding Attributes}">
          <ItemsControl.ItemTemplate>
            <DataTemplate>
              <StackPanel Orientation="Horizontal">
                <Border BorderThickness="2" BorderBrush="Green">
                  <TextBlock Text="{Binding Key}" Foreground="Green"/>
                </Border>
                <Border BorderThickness="2" BorderBrush="Blue">
                  <ItemsControl ItemsSource="{Binding Value}">
                    <ItemsControl.ItemTemplate>
                      <DataTemplate>
                        <Border BorderThickness="2" BorderBrush="Red">
                          <TextBlock Text="{Binding}" Foreground="Green"/>
                        </Border>
                      </DataTemplate>
                    </ItemsControl.ItemTemplate>
                  </ItemsControl>
                </Border>
              </StackPanel>
            </DataTemplate>
          </ItemsControl.ItemTemplate>
        </ItemsControl>
      </Expander>
    </DataTemplate>
  </ItemsControl.ItemTemplate>
</ItemsControl>

実行結果