我正在尝试创建一个显示圆圈的简单自定义控件。此控件具有Radius属性,但遗憾的是它不适用于该控件。这是一个模板:
<Style TargetType="local:SizedCircle">
<Setter Property="VerticalAlignment" Value="Center"/>
<Setter Property="HorizontalAlignment" Value="Center" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="local:SizedCircle">
<Border
Background="{TemplateBinding Background}"
BorderBrush="{TemplateBinding BorderBrush}"
BorderThickness="{TemplateBinding BorderThickness}">
<Ellipse Width="{TemplateBinding Radius}" Height="{TemplateBinding Radius}">
<Ellipse.Fill>
<SolidColorBrush Color="Red"/>
</Ellipse.Fill>
</Ellipse>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
和
namespace CustomControls
{
public sealed class SizedCircle : Control
{
public SizedCircle()
{
this.DefaultStyleKey = typeof(SizedCircle);
}
public string Radius
{
get { return (string)GetValue(RadiusProperty); }
set { SetValue(RadiusProperty, value); }
}
// Using a DependencyProperty as the backing store for Radius. This enables animation, styling, binding, etc...
public static readonly DependencyProperty RadiusProperty =
DependencyProperty.Register("Radius", typeof(string), typeof(SizedCircle), new PropertyMetadata(null));
}
}
然后我尝试使用这个控件:
<local:SizedCircle Radius="50" />
但我在屏幕上看不到任何内容。此Radius属性不适用。我错了什么?
答案 0 :(得分:3)
尝试将属性类型更改为double而不是string。