有没有办法显示或列出子控件的所有父容器？

Question

而不是写出

var parentContainer0 = this.Parent;
var parentContainer1 = parentContainer0.Parent;
var parentContainer2 = parentContainer1.Parent;

有没有更好的方法来列出父容器的所有层？

Answer 1

要获取所有祖先的序列，您可以编写一个迭代器块来轻松计算它：

public static IEnumerable<Control> GetAncestors (Control control)
{
    var current = control.Parent;
    while (current != null)
    {
        yield return current;
        current = current.Parent;
    }
}

如果你想要第N代父代，你可以在这个序列上使用ElementAt，使用LINQ：

var grandparent = someControl.ElementAt(2);

Answer 2

List<Control> layers = new List<Control>();
Control currentLayer = this.Parent;
while (currentLayer != null)
{
   layers.Add(currentLayer);
   currentLayer = currentLayer.Parent;
}