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ToolStripItem.Invalidate Method

Invalidates the entire surface of the ToolStripItem and causes it to be redrawn.

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

public void Invalidate()

The following code example demonstrates how to use the Invalidate method for custom rendering. This code example is part of a larger example provided for the ToolStripItem class.

// This method defines the behavior of the MouseEnter event. 
// It sets the state of the rolloverValue field to true and 
// tells the control to repaint. 
protected override void OnMouseEnter(EventArgs e)
{
    base.OnMouseEnter(e);

    this.rolloverValue = true;

    this.Invalidate();
}

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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