我如何删除从WPF窗口的控制？ RemoveLogicalChild 只删除它作为一个逻辑子，但保留它仍然可见。

How can I remove a control from a window in WPF? RemoveLogicalChild only removes it as a logical child, but leaves it still visible.

推荐答案

在可视化树的每一个元素是树的每根，就像窗口或另一种元素的子。理想情况下，你会知道哪些因素是您要删除什么 FrameworkElement的的类型是元素的父。

Every element in the visual tree is either the root of the tree, like a Window, or a child of another element. Ideally you would know which element is the parent of the element you are trying to remove and what type of FrameworkElement it is.

例如，如果你有一个画布和许多孩子和你有一个矩形这是previously添加到画布，你可以从可视化树中删除从取出的画布是这样的：

For example, if you have a Canvas and many children and you have a Rectangle that was previously added to the Canvas, you can remove it from the visual tree by removing it from the Canvas like this:

canvas.Children.Remove(control);

但如果你不这样做的知道谁控制的母公司是，你可以使用VisualTreeHelper.GetParent法找出：

But if you don't know who the parent of the control is, you can use the VisualTreeHelper.GetParent Method to find out:

DependencyObject parent = VisualTreeHelper.GetParent(control);

您现在面临的问题是父是的DependencyObject 键，而这大概也是一个 FrameworkElement的，你不知道的这一种元素它是。这是因为你如何删除子取决于类型是很重要的。如果父是按钮，那么你只清除内容属性。如果父是画布，你必须使用 Children.Remove 。

The problem you now face is parent is a DependencyObject and while it is probably also a FrameworkElement, you don't know which kind of element it is. This is important because how you remove the child depends on the type. If the parent is a Button, then you just clear the Content property. If the parent is a Canvas, you have to use Children.Remove.

在一般情况下，你可以通过检查处理最常见的情况下，该项目是否为面板，然后从它的孩子取出，否则，如果它是一个 ContentControl中（如窗口），然后将其内容属性空。但这并不是万无一失;还有其他的情况。

In general, you can handle the most common cases by checking whether the item is a Panel and then remove from its children, otherwise if it is a ContentControl (like a Window) then set its Content property to null. But this isn't foolproof; there are other cases.

您也必须小心，不要删除的东西是从模板扩大，因为这不是一个静态的内容，你可以修改的意愿。如果添加的控制或存在于静态的XAML中，你可以放心地将其删除。

You also have to be careful not to remove something that is expanded from a template because that is not a static content you can modify at will. If you added the control or existed in static XAML, you can safely remove it.