设置Popup的父级

问题描述

如何设置Popup的Parent属性？使用以下代码，Popup的Parent属性为null。

How is the Parent property of a Popup set? With the following code, the Parent property of the Popup is null.

var text = new TextBox();
text.Text = "Popup Text";

var popup = new Popup();
popup.Child = text;
popup.PlacementTarget = button;
popup.Placement = PlacementMode.Bottom;
popup.IsOpen = true;

其中按钮是一个以XAML命名的按钮。



如果我将一个ComboBox添加到我的XAML中，它也可以将其内容可视化为Popup，但是它将其Parent属性设置为Grid。它是如何设法做到的？

where button is a Button named in XAML.

If I add a ComboBox to my XAML, it is visualizing its content as a Popup as well, but it has its Parent property set to a Grid. How does it manage to do that?

推荐答案

public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
            var method = typeof(FrameworkElement).GetMethod("AddLogicalChild", BindingFlags.Instance | BindingFlags.NonPublic);
            method.Invoke(_coreParent, new object[] { Parent });
        }

创建课程时，需要设置coreParent。有用。在它之后，您可以使用RelativeSource，如果您的弹出窗口或工具提示是您控件的子项

When you create your class you need set coreParent. It works. After it you can use RelativeSource like if your popup or tooltip is child of your control

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