編輯

共用方式為

Popup.AllowsTransparency Property

  • Reference

Definition

Namespace:
System.Windows.Controls.Primitives
Assembly:
PresentationFramework.dll

Gets or sets a value that indicates whether a Popup control can contain transparent content.

public:
 property bool AllowsTransparency { bool get(); void set(bool value); };
public bool AllowsTransparency { get; set; }
member this.AllowsTransparency : bool with get, set
Public Property AllowsTransparency As Boolean

Property Value

Boolean

true if the Popup control can contain transparent content; otherwise, false. The default is false.

Examples

The following example shows how to set the AllowsTransparency property on a Popup control.

myPopup.AllowsTransparency = true;

myPopup.AllowsTransparency = True

<DockPanel  Width="500" Background="Aqua">
  <Popup Placement="Center" PlacementRectangle="0,0,30,50"  
          IsOpen ="True" AllowsTransparency="True"
          PopupAnimation="Fade">
    <TextBlock Background="Purple">Popup Text</TextBlock>
  </Popup>
</DockPanel>

Remarks

A Popup control can only contain transparent content when the application runs with full trust. An application that runs with full trust has complete access to system resources and is typically installed on the local system. For more information, see Security (WPF).

This property cannot be set to true when the Popup is hosted in a XAML browser application (XBAP).

If the AllowsTransparency property is set to true in an application that does not run in full trust, the AllowsTransparency property value is changed to false. An application that is hosted in a browser is an example of an application that does not run in full trust.

Dependency Property Information
Identifier field AllowsTransparencyProperty
Metadata properties set to true None

Applies to

See also