Invalidate(LeadRect) Method

Invalidates a portion of the entire surface of the control and causes the control to be redrawn.

Syntax

C#
Visual Basic
Objective-C
Java

public virtual void Invalidate( 
   LeadRect rc
)

'Declaration

Public Overloads Overridable Sub Invalidate( _
   ByVal rc As LeadRect _
)

Parameters

rc: Invalidate rectangle in control coordinates. Pass a LeadRect or a rectangle with 0 width or height to invalidate the enitre surface of the control.

Remarks

Calling Invalidate will cause the viewer to re-render the content of the view and items. The value of rc will be used as the invalid rectangle used with ImageViewerRenderEventArgs and if it is not empty, only that portion of the viewer will updated.

To re-render a single item quickly, use InvalidateItem or InvalidateItemByIndex.

For more information, refer to Image Viewer Rendering.

Requirements

Target Platforms

Reference

ImageViewer Class
ImageViewer Members
Overload List