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UIElement::MouseLeave Event

Occurs when the mouse pointer leaves the bounds of this element.

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

public:
virtual   event MouseEventHandler^ MouseLeave {
	void add (MouseEventHandler^ value);
	void remove (MouseEventHandler^ value);
}
<object MouseLeave="MouseEventHandler" .../>

Implements

IInputElement::MouseLeave

Identifier field

MouseLeaveEvent

Routing strategy

Direct

Delegate

MouseEventHandler

  • Override OnMouseLeave to implement class handling for this event in derived classes.

MouseLeave is a routed event that uses the direct event handling routing strategy. Direct routed events are not raised along a route; instead, they are handled in the same element where they are raised. However, they do enable other aspects of routed event behavior, such as event triggers in styles.

Although MouseLeave tracks when the mouse leaves an element, this event more literally reports that the IsMouseOver property value has changed from true to false on this element.

This event creates an alias for the Mouse::MouseLeave attached event for this class, so that MouseLeave is part of the class members list when UIElement is inherited as a base element. Event handlers that are attached to the MouseLeave event are attached to the underlying Mouse::MouseLeave attached event and receive the same event data instance.

This example shows how to change the color of an element as the mouse pointer enters and leaves the area occupied by the element.

This example consists of a Extensible Application Markup Language (XAML) file and a code-behind file. For the complete samples, see Mouse Pointer Sample.

NoteNote:

This example demonstrates how to use events, but the recommended way to achieve this same effect is to use a Trigger in a style. For more information, see Styling and Templating.

The following XAML creates the user interface, which consists of Border around a TextBlock, and attaches the MouseEnter and MouseLeave event handlers to the Border.

<StackPanel>
  <Border MouseEnter="OnMouseEnterHandler"
          MouseLeave="OnMouseLeaveHandler"
          Name="border1" Margin="10"
          BorderThickness="1"
          BorderBrush="Black"
          VerticalAlignment="Center"
          Width="300" Height="100">
    <Label Margin="10" FontSize="14"
           HorizontalAlignment="Center">Move Cursor Over Me</Label>
  </Border>
</StackPanel>

The following code behind creates the MouseEnter and MouseLeave event handlers. When the mouse pointer enters the Border, the background of the Border is changed to red. When the mouse pointer leaves the Border, the background of the Border is changed back to white.

No code example is currently available or this language may not be supported.

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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