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FrameworkElement.IsLoaded Property

Gets a value that indicates whether this element has been loaded for presentation.

Namespace:  System.Windows
Assembly:  PresentationFramework (in PresentationFramework.dll)

public function get IsLoaded () : boolean
You cannot set this property in XAML.

Property Value

Type: System.Boolean
true if the current element is attached to an element tree; false if the element has never been attached to a loaded element tree.

From a newly constructed FrameworkElement, this property starts off false, and remains true after it is set to true, even if the element is subsequently removed from a connected logical tree by code. true state is set by the general presentation logic when elements are loaded into the presentation engine.

Typically, loaded elements are rendered, but not all FrameworkElement derived classes have a presentation, and other properties such as Visibility can influence presentation.

The following example implements two handlers: one is handling the Loaded event of the root element, so it is certain that the page root element is loaded because that is the significance of the event. The other handler is hooked to a user control, and calls IsLoaded to assure that the root element is loaded completely. Both handlers call the same function (not shown) that will populate child elements with fresh data.

private void OnLoad(object sender, RoutedEventArgs e)
{
    displayData();
}
private void updateSummary(object sender, RoutedEventArgs e)
{
    if (GroupBoxPage.IsLoaded)
        displayData();
}

Windows 7, Windows Vista, Windows XP SP2, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0

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