PopupWindow can control the position of pop-up elements more flexibly than PopTip.

WARNING

PopupWindow may become obsolete in future versions.

[TemplatePart(Name = ElementMainBorder, Type = typeof(Border))]
[TemplatePart(Name = ElementTitleBlock, Type = typeof(TextBlock))]
public class PopupWindow : System.Windows.Window

Attributes

Property	Description	Default Value	Remarks
PopupElement	Popup Element
ShowTitle	Whether to show the title	true
ShowCancel	Whether to show the cancel button	false
ShowBorder	Whether to show the border	false
ContentStr

Method

Name	Description
Show(FrameworkElement, bool)	Display window (pop-up element, with background or not)
Show(System.Windows.Window, Point)	Display window (relative window, offset coordinates)
Show(string)	Show window (pop-up message)
ShowDialog(FrameworkElement, bool)	Modal display window (pop-up element, whether with background)
ShowDialog(string, string title, bool)	Modal display window (pop-up information, title, whether to display the cancel button)

Case

PopupWindow popup = new PopupWindow()
                {
                    MinWidth = 400,
                    Title = "Title",
                    WindowStartupLocation = WindowStartupLocation.CenterScreen,
                    ShowInTaskbar = true,
                    AllowsTransparency = true,
                    WindowStyle = WindowStyle.None
                };
                TextBox txtUsername = new TextBox();
popup.PopupElement = mainStack;
popup.ShowDialog();