Artigo
11/18/2011

Control.OnMouseLeftButtonDown Method

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Called before the MouseLeftButtonDown event occurs.

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

Syntax

'Declaration
Protected Overridable Sub OnMouseLeftButtonDown ( _
    e As MouseButtonEventArgs _
)

protected virtual void OnMouseLeftButtonDown(
    MouseButtonEventArgs e
)

Parameters

e
Type: System.Windows.Input.MouseButtonEventArgs
The data for the event.

Remarks

The OnMouseLeftButtonDown method is called before any event handler for the MouseLeftButtonDown event is called. This method allows derived classes to handle the MouseLeftButtonDown event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

This implementation does not change the handled state (the Handled property) of the MouseLeftButtonDown event data.

Notes to Inheritors

If you override OnMouseLeftButtonDown, 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.

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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