我正在编写针对WinRT的第一个自定义用户控件，但我遇到了问题。
我想在我的控件中公开一个图像，PART_NwBadge和它作为依赖属性的可见性。然后我想通过样式中的setter提供默认值。这部分不起作用。相反，正在应用DependencyProperty（在BadgedButton.cs中）的默认值。
甚至可以做我所描述的事情吗？或者我应该在C＃代码中设置默认值？如果我确实需要在C＃代码中设置值，有人会评论如何在代码中加载图像资源吗？经过大量的搜索，我还没有找到一个有效的解决方案。
最后，由于这是我第一次尝试编写自定义控件，请提出我可以做出的任何改进，即使它们与问题没有直接关系。
Windows 8 Consumer Preview
C＃/的WinRT /地铁
Visual Studio 11 Beta
主题/ Generic.xaml
<ResourceDictionary
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:l="using:InkSdkTestApplication.Controls">
<Style TargetType="l:BadgedButton">
<Setter Property="Width" Value="36"/>
<Setter Property="Height" Value="36"/>
<Setter Property="Background" Value="#1C1C1C"/>
<Setter Property="BorderBrush" Value="White"/>
<Setter Property="BorderThickness" Value="2"/>
<Setter Property="NwBadge">
<Setter.Value>
<Image Width="16" Height="16" Source="../Assets/mouse_16x16.png"/>
</Setter.Value>
</Setter>
<Setter Property="NwBadgeVisibility" Value="Collapsed"/>
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="l:BadgedButton">
<Border x:Name="PART_Border"
Width="{TemplateBinding Width}"
Height="{TemplateBinding Height}"
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<Grid>
<ContentPresenter x:Name="PART_Content"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Content="{TemplateBinding Content}"/>
<Image x:Name="PART_NwBadge"
HorizontalAlignment="Left"
VerticalAlignment="Top"
Width="16" Height="16"
Visibility="{TemplateBinding NwBadgeVisibility}"
Source="{TemplateBinding NwBadge}"/>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</ResourceDictionary>
控制/ BadgedButton.cs
namespace InkSdkTestApplication.Controls
{
public sealed class BadgedButton : Control
{
#region // Dependency Properties
public static DependencyProperty ContentProperty =
DependencyProperty.Register(
"Content",
typeof(FrameworkElement),
typeof(BadgedButton),
new PropertyMetadata(null));
public static DependencyProperty NwBadgeProperty =
DependencyProperty.Register(
"NwBadge",
typeof(Image),
typeof(BadgedButton),
new PropertyMetadata(null));
public static DependencyProperty NwBadgeVisibilityProperty =
DependencyProperty.Register(
"NwBadgeVisibility",
typeof(Visibility),
typeof(BadgedButton),
new PropertyMetadata(Visibility.Visible));
#endregion
#region // Public Properties
public FrameworkElement Content
{
get { return (FrameworkElement)GetValue(ContentProperty); }
set { SetValue(ContentProperty, value); }
}
public Image NwBadge
{
get { return (Image)GetValue(NwBadgeProperty); }
set { SetValue(NwBadgeProperty, value); }
}
public Visibility NwBadgeVisibility
{
get { return (Visibility)GetValue(NwBadgeVisibilityProperty); }
set { SetValue(NwBadgeVisibilityProperty, value); }
}
#endregion
public BadgedButton()
{
this.DefaultStyleKey = typeof(BadgedButton);
}
}
}