我试图使用控制到家长的高度/宽度属性的ElementName 和路径绑定。然而，我不想绑定到的实际高度，而是正好一半的高度。 在路径 EX pression可以做数学题？

I'm trying to bind a control to the parent's Height/width property using ElementName and a Path. However, I don't want to bind to the actual height, but to exactly half the height. Can the Path expression do the math?

例如。 路径= {的ActualHeight / 2}

我无法找到一个方法来做到这一点。是否有任何其他聪明的做法？

I couldn't find a way to do that. IS there any other clever approach?

谢谢！

推荐答案

没有它不能，你应该使用的装订器

No it can't you should use binding converters

public class MyConverter : IValueConverter
{
public object Convert(object value, Type  targetType,
      object parameter, CultureInfo culture)
  {
      return (int)value/2;
  }

  public object ConvertBack(object value, Type targetType,
      object parameter, CultureInfo culture)
  {
    return null;
  }
}