Image.Height TemplateBinding不起作用(Image.Height Temp

2019-08-17 15:05发布

我创建从Button类在WPF实现的CustomControl。

public class ImageButton : Button
{
      ...

       public int ImageHeight
       {
           get { return (int)GetValue(ImageHeightProperty); }
           set { SetValue(ImageHeightProperty, value); }
       }
       public static readonly DependencyProperty ImageHeightProperty =
           DependencyProperty.Register("ImageHeight", typeof(int), typeof(ImageButton), new UIPropertyMetadata(32)); 

       ...
}

我有这样的资源模板：

<Setter Property="Template">
   <Setter.Value>
     <ControlTemplate TargetType="{x:Type custom:ImageButton}">
       <Border>
         <StackPanel>
          <Image Name="image" Height="{TemplateBinding ImageHeight}"/>
          <TextBlock Text="{TemplateBinding Text}" />
         </StackPanel>
       </Border>
     <ControlTemplate.Triggers>
   </ControlTemplate>
 </Setter.Value>

ImageHeight dependecy属性不具有约束力。当我写像下面它的工作原理成功。