WPF 依赖属性使用

xmlns:toolbox="clr-namespace:EBookApp.Toolbox"

<Image x:Name="imageShort" Stretch="Fill" Width="50" d:LayoutOverrides="HorizontalMargin"
Source="{Binding RelativeSource={RelativeSource AncestorType=toolbox:ResDetailItemControl},Path=Thumbnail}"/>

public static readonly DependencyProperty ThumbnailProperty =
DependencyProperty.Register("Thumbnail", typeof(string), typeof(ResDetailItemControl), new PropertyMetadata("../Images/img.png"));

public string Thumbnail
{
get { return (string)GetValue(ThumbnailProperty); }
set { SetValue(ThumbnailProperty, value); }
}