设计器显示“绑定”只能在DependencyObject错误的DependencyProperty上设置(designer shows A 'Binding' can only b

设计器显示“绑定”只能在DependencyObject错误的DependencyProperty上设置(designer shows A 'Binding' can only be set on a DependencyProperty of a DependencyObject error)

我创建了一个具有DependencyProperty的用户控件，当我尝试绑定它时，我在设计器中出现错误：

''绑定'不能在'RocIndicator'类型的'ROCValue'属性上设置，'绑定'只能在DependencyObject的DependencyProperty上设置。

编辑：我已经添加了静态修饰符，但我仍然得到该错误。 是的，我重新启动了visual studio。

public partial class RocIndicator : UserControl { public static readonly DependencyProperty ROCValueProperty = DependencyProperty.Register("ROCValue", typeof(double), typeof(RocIndicator), new FrameworkPropertyMetadata(0.0, new PropertyChangedCallback(ValueChanged))); public double ROCValue { get { return (double)GetValue(ROCValueProperty); } set { SetValue(ROCValueProperty, value); } } }

这是XAML：

<View:RocIndicator ROCValue="{Binding ROC}" Margin="0,10,0,0" HorizontalAlignment="Center" Width="35"/>

但是当我建立和运行它的作品。 为什么会出现此错误？

I've created a user control that has a DependencyProperty, and when I try binding to it I get an error in the designer:

" 'Binding' cannot be set on the 'ROCValue' property of type 'RocIndicator'. A 'Binding' can only be set on a DependencyProperty of a DependencyObject.

Edit: I've added the static modifier, but I still get that error. and yes, I've restarted visual studio.

public partial class RocIndicator : UserControl { public static readonly DependencyProperty ROCValueProperty = DependencyProperty.Register("ROCValue", typeof(double), typeof(RocIndicator), new FrameworkPropertyMetadata(0.0, new PropertyChangedCallback(ValueChanged))); public double ROCValue { get { return (double)GetValue(ROCValueProperty); } set { SetValue(ROCValueProperty, value); } } }

this is the XAML:

<View:RocIndicator ROCValue="{Binding ROC}" Margin="0,10,0,0" HorizontalAlignment="Center" Width="35"/>

but when I build & run it works. why is this error showing?

最满意答案

依赖属性声明必须是static ：

public static readonly DependencyProperty ROCValueProperty ...

Dependency property declaration must be static:

public static readonly DependencyProperty ROCValueProperty ...