Provides handling for the KeyDown event when a key is pressed while the control has focus.
Assembly: System.Windows.Controls (in System.Windows.Controls.dll)
'Declaration Protected Overrides Sub OnKeyDown ( _ e As KeyEventArgs _ )
protected override void OnKeyDown( KeyEventArgs e )
e is null.
The OnKeyDown method is called before any event handler for the KeyDown is called. This method allows derived classes to handle the KeyDown event without attaching a delegate. This is the preferred technique for handling the event in a derived class.
When the Control key is pressed in combination with other keys, the TreeView physically scrolls by pixel. When the same keys are pressed alone; not in combination with the Control, the TreeView control scrolls logically, by item.
The Home key is pressed and the control successfully puts focus on the first item.
The End key is pressed and the control successfully puts focus on the last item.
Notes to Inheritors
If you override OnKeyDown, you can prevent registered delegates from receiving events by setting Handled to true. For more information about routed events and the Handled property, see Events Overview for Silverlight.
Supported in: 5, 4, 3
For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.