我有一个类层次结构,如下所示,绑定到VisibleRange属性是在设计器中抛出.
鉴于此处的类层次结构：
// Base class
public abstract class AxisBase : ContentControl,IAxis
{
public static readonly DependencyProperty VisibleRangeProperty = DependencyProperty.Register(
"VisibleRange",typeof(IRange),typeof(AxisBase),new PropertyMetadata(default(IRange),OnVisibleRangeChanged));
public IRange VisibleRange
{
get { return (IRange)GetValue(VisibleRangeProperty); }
set { SetValue(VisibleRangeProperty,value); }
}
}
// Derived class
public class DateTimeAxis : AxisBase
{
public new IRange<DateTime> VisibleRange
{
get { return (IRange<DateTime>)GetValue(VisibleRangeProperty); }
set { SetValue(VisibleRangeProperty,value); }
}
}
// And interface definitions
public interface IRange<T> : IRange
{
}
和设计师(XAML)在这里：
<local:DateTimeAxis Style="{StaticResource XAxisStyle}"
VisibleRange="{Binding ElementName=priceChart,Path=XAxis.VisibleRange,Mode=TwoWay}"/>
我得到这个例外：
A ‘Binding’ cannot be set on the ‘VisibleRange’ property of type ‘DateTimeAxis’. A ‘Binding’ can only be set on a DependencyProperty of a DependencyObject.
派生类DateTimeAxis公开VisibleRange属性,该属性被new关键字覆盖.我不能将通用类型参数添加到基本AxisBase类,我还需要访问这两个类中的属性.所以,我想知道给定这些约束,如果有人有任何建议如何更好地避免设计师异常？
