Popup(弹跳）

Remarks

Do not use a Popup if a Flyout, MenuFlyout, ToolTip or MessageDialog is more appropriate.

Popup is a general purpose container for hosting UIElement s on top of existing content. You typically use a Popup to temporarily display content that accomplishes a particular task. The Popup does not have a default visual template. Instead, you must set the content yourself by specifying a single Child element as content. You can define the Popup content inline, but it's common to define the content as a UserControl, and then set the UserControl as the Child of the Popup.

You position the Popup by setting the HorizontalOffset and VerticalOffset properties. The Popup is offset relative to its immediate parent container. A Popup is not modal, so input to the screen behind it is not blocked.

To show a Popup, set its IsOpen property to true. To hide the Popup, set IsOpen to false. You can set IsLightDismissEnabled to make the Popup hide automatically when a user taps anywhere away from it.

The Popup can host input controls. When hosting input controls like TextBox, the touch keyboard might slide into view when the user touches the input control. If the Popup 's parent container is already in the visual tree, the Popup automatically repositions itself when the touch keyboard is in view. Otherwise, the Popup is not repositioned and the touch keyboard can cover it. This can happen if you create the Popup in code and set IsOpen to true without adding the Popup as a child of an element in the visual tree.

For more code examples that show the Popup control, see the XAML Popup sample.

Examples

This example shows a simple Popup with content defined inline.

XAML

// Handles the Click event on the Button inside the Popup control and
// closes the Popup.
private void ClosePopupClicked(object sender, RoutedEventArgs e)
{
// if the Popup is open, then close it
if (StandardPopup.IsOpen) { StandardPopup.IsOpen = false; }
}

// Handles the Click event on the Button on the page and opens the Popup.
private void ShowPopupOffsetClicked(object sender, RoutedEventArgs e)
{
// open the Popup if it isn't open already
if (!StandardPopup.IsOpen) { StandardPopup.IsOpen = true; }
}

This example shows a Popup that has a UserControl set as its Child element. The UserControl defines the content of the Popup.

XAML

XAML

using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Controls.Primitives;

namespace XAMLPopup
{
    public sealed partial class PopupInputContent : UserControl
    {
        public PopupInputContent()
        {
            this.InitializeComponent();
        }

// Handles the Click event of the 'Save' button simulating a save and close
        private void SimulateSaveClicked(object sender, RoutedEventArgs e)
        {
            // in this example we assume the parent of the UserControl is a Popup
            Popup p = this.Parent as Popup;

// close the Popup
            if (p != null) { p.IsOpen = false; }
        }
    }
}

Constructors

Popup() Popup() Popup()

Initializes a new instance of the Popup class.

public Popup()public Popup()Public Sub New()

Attributes

奔跑的蒲公英

Popup(弹跳）

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