有没有一种方法可以获取GridViewColumn的父级(ListView)?
我已经尝试使用LogicalTreeHelper和VisualTreeHelper,但都无法实现。
我可以分享一个有趣但丑陋的what-have-you-tried,它能够工作,但不能描述它的丑陋:
public class Prototype
{
[Test, RequiresSTA]
public void HackGetParent()
{
var lw = new ListView();
var view = new GridView();
var gvc = new GridViewColumn();
view.Columns.Add(gvc);
lw.View = view;
var ancestor = new Ancestor<ListView>();
var binding = new Binding
{
RelativeSource = new RelativeSource(RelativeSourceMode.FindAncestor, typeof(ListView), 1),
Converter = new GetAncestorConverter<ListView>(), // Use converter to hack out the parent
ConverterParameter = ancestor // conveterparameter used to return the parent
};
BindingOperations.SetBinding(gvc, GridViewColumn.WidthProperty, binding);
lw.Items.Add(DateTime.Now); // think it cannot be empty for resolve to work
ResolveBinding(lw);
Assert.AreEqual(lw, ancestor.Instance);
}
private void ResolveBinding(FrameworkElement element)
{
element.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
element.Arrange(new Rect(element.DesiredSize));
element.UpdateLayout();
}
}
public class GetAncestorConverter<T> : IValueConverter
{
public object Convert(object value, Type type, object parameter, CultureInfo culture)
{
var ancestor = (Ancestor<T>)parameter;
ancestor.Instance = (T)value;
return null;
}
public object ConvertBack(object o, Type type, object parameter, CultureInfo culture)
{
throw new NotSupportedException();
}
}
public class Ancestor<T>
{
public T Instance { get; set; }
}