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DataGridView.OnMouseLeave(EventArgs) Method

  • Reference

Definition

Namespace:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll

Raises the MouseLeave event.

protected:
 override void OnMouseLeave(EventArgs ^ e);
protected override void OnMouseLeave (EventArgs e);
override this.OnMouseLeave : EventArgs -> unit
Protected Overrides Sub OnMouseLeave (e As EventArgs)

Parameters

e
EventArgs

An EventArgs that contains the event data.

Examples

The following code example illustrates the use of this method. This example is part of a larger example available in How to: Customize Cells and Columns in the Windows Forms DataGridView Control by Extending Their Behavior and Appearance.

// Force the cell to repaint itself when the mouse pointer enters it.
protected override void OnMouseEnter(int rowIndex)
{
    this.DataGridView.InvalidateCell(this);
}

// Force the cell to repaint itself when the mouse pointer leaves it.
protected override void OnMouseLeave(int rowIndex)
{
    this.DataGridView.InvalidateCell(this);
}

' Force the cell to repaint itself when the mouse pointer enters it.
Protected Overrides Sub OnMouseEnter(ByVal rowIndex As Integer)
    Me.DataGridView.InvalidateCell(Me)
End Sub

' Force the cell to repaint itself when the mouse pointer leaves it.
Protected Overrides Sub OnMouseLeave(ByVal rowIndex As Integer)
    Me.DataGridView.InvalidateCell(Me)
End Sub

Remarks

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnMouseLeave method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors

When overriding OnMouseLeave(EventArgs) in a derived class, be sure to call the base class's OnMouseLeave(EventArgs) method so that registered delegates receive the event.

Applies to

See also