无法更改自己的属性样式
我在自定义控件类 DataPoint 中创建依赖属性：
public abstract class DataPoint : Control
{
public Color BaseColor
{
get { return (Color)GetValue(BaseColorProperty); }
set { SetValue(BaseColorProperty, value); }
}
public static readonly DependencyProperty BaseColorProperty =
DependencyProperty.Register("BaseColor", typeof(Color), typeof(DataPoint), new UIPropertyMetadata(Colors.DarkRed));
// Other class stuff
}
然后创建其他自定义控件 AreaDataPoint 继承 DataPoint：
public class AreaDataPoint : DataPoint
{
static AreaDataPoint()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(AreaDataPoint), new FrameworkPropertyMetadata(typeof(AreaDataPoint)));
}
// Other class stuff
}
在 xaml 中，我尝试将值分配给 BaseColor 属性，但它不起作用
<Style TargetType="{x:Type local1:AreaDataPoint}">
<Setter Property="BaseColor" Value="DarkGreen" />
</Style>
I'm creating dependency property in my custom controll class DataPoint:
public abstract class DataPoint : Control
{
public Color BaseColor
{
get { return (Color)GetValue(BaseColorProperty); }
set { SetValue(BaseColorProperty, value); }
}
public static readonly DependencyProperty BaseColorProperty =
DependencyProperty.Register("BaseColor", typeof(Color), typeof(DataPoint), new UIPropertyMetadata(Colors.DarkRed));
// Other class stuff
}
Then I create other custom control AreaDataPoint inheriting DataPoint:
public class AreaDataPoint : DataPoint
{
static AreaDataPoint()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(AreaDataPoint), new FrameworkPropertyMetadata(typeof(AreaDataPoint)));
}
// Other class stuff
}
In xaml I'm trying to assign value to BaseColor property, but it doesn't work
<Style TargetType="{x:Type local1:AreaDataPoint}">
<Setter Property="BaseColor" Value="DarkGreen" />
</Style>
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评论（2）
您正在设置“Background”属性，而不是“BaseColor”属性？
请记住，您可能需要一个转换器来获取字符串
DarkGreen并将其转换为Color实例。You're setting the "Background" property, not the "BaseColor" property?
Bear in mind you might need a converter to take the string
DarkGreenand convert it to aColorinstsance.您如何确定它“不起作用”。从您的代码中的内容来看，一切都是正确的，因此您可能在其他地方做了一些导致 Style 值丢失的事情。您是否可以在代码或 XAML 中的某处设置 BaseColor 的本地值？您是否已验证使用 BaseColor 属性的位置实际上正确地提取了值？直接使用颜色也不常见 - 大多数情况（前景、背景、形状填充）都使用画笔，所以我也会检查一下。
How are you determining that it "doesn't work". From what's in your code here everything is correct so you may be doing something elsewhere that's causing the Style value to get lost. Are you possibly setting a local value for the BaseColor somewhere in code or XAML? Have you verified that where you're using the BaseColor property is actually pulling the value correctly? It's also not common to use a Color directly - most situations (Foregrounds, Backgrounds, Shape Fills) use Brushes so I'd check that too.