如何正确设置PropertyPath

Question

如何正确添加PropertyPath？

我需要将usercontrol DataContext绑定到DataContext，TwoWay。

    var binding = new Binding()
                          {
                              Mode = BindingMode.TwoWay,
                              Source = ((FrameworkElement)sender),
                              Path = new PropertyPath(FrameworkElement.DataContextProperty)
                          };
    binding.Source = ((FrameworkElement) sender);
    changeImage.SetBinding(FrameworkElement.DataContextProperty, binding);

Answer 1

binding.Path = new PropertyPath("DataContext")

如果您说出代码有什么问题，也会有所帮助。

Answer 2

PropertyPath有一个字符串构造函数，它采用如下属性路径：

  var binding = new Binding()
                {
                   Mode = BindingMode.TwoWay,
                   Source = ((FrameworkElement)sender),
                   Path = new PropertyPath("DataContext")
                };

或者，Binding有一个构造函数，它将从give字符串参数创建PropertyPath：

  var binding = new Binding("DataContext")
                {
                   Mode = BindingMode.TwoWay,
                   Source = ((FrameworkElement)sender)
                };