Popup.Opened Event

Occurs when the IsOpen property changes to true.

Namespace:  System.Windows.Controls.Primitives
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public event EventHandler Opened
<object Opened="EventHandler" .../>

A Popup is opened and closed by toggling the IsOpen property.

The following example shows how to define an event handler for the Opened event.

private void PopupOpening(object sender, EventArgs e)
{
    //Code to execute when Popup opens
}
<DockPanel>
  <Popup Opened="PopupOpening">
    <TextBlock Background="Yellow">Popup Text</TextBlock>
  </Popup>
</DockPanel>

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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