Question

我有一系列可以传递的控件，有时它们会作为子项添加到另一个控件中。

在许多情况下，我无法确定控件当前是否是另一个控件的子控件。

例如：

Label lbl = new Label( );
/*Stuff happens; lbl may be assigned or not; whatever.*/
//If the label has already been assigned as a child to a viewbox
if ( lbl.Parent is Viewbox )
    return lbl.Parent;
else {
    if (lbl.Parent != null )
        //Of course this fails because there is no lbl.Parent.Child property.
        lbl.Parent.Child = null;
    return new Viewbox( ) { Child = lbl, Stretch = Stretch.Uniform };
}

完全有可能我完全误解了Control.Parent属性的功能。

是否可以通过控件本身从它的父级中删除一个控件？

Answer 1

void RemoveElementFromItsParent(FrameworkElement el)
{
    if (el.Parent == null)
        return;

    var panel = el.Parent as Panel;
    if (panel != null)
    {
        panel.Children.Remove(el);
        return;
    }

    var decorator = el.Parent as Decorator;
    if (decorator != null)
    {
        decorator.Child = null;
        return;
    }

    var contentPresenter = el.Parent as ContentPresenter;
    if (contentPresenter != null)
    {
        contentPresenter.Content = null;
        return;
    }

    var contentControl = el.Parent as ContentControl;
    if (contentControl != null)
        contentControl.Content = null;
}

来源：https://stackoverflow.com/a/19318405/1271037

如何在WPF / XAML中通过子项删除父项子控件？

1 个答案: