InvalidatePreview Method

Used to dirty the preview information so that it will be regenerated upon the next request.

Syntax

Visual Basic

'Declaration
 
Public Sub InvalidatePreview() 

C#

public void InvalidatePreview()

Remarks

The InvalidatePreview method is used to invalidate the preview as displayed by the contained PrintPreviewControl thereby causing a new print preview operation to occur regenerating the preview pages.

Example

The following code gets called before the page setup dialog is displayed from the UltraPrintPreviewDialog.

For an overview of how to handle events in Visual Basic or Visual C#, see Event Handlers in Visual Basic and Visual C#. For specific information and code examples illustrating how to consume events in your application, see Consuming Events in the .NET Framework Developer's Guide.

Visual Basic

Imports Infragistics.Win
Imports Infragistics.Win.Printing
Imports Infragistics.Win.UltraWinGrid
Imports Infragistics.Win.UltraWinScrollBar
Imports Infragistics.Win.UltraWinToolbars


    Private Sub ultraPrintPreviewDialog1_PageSetupDialogDisplaying(ByVal sender As System.Object, ByVal e As Infragistics.Win.Printing.PageSetupDialogDisplayingEventArgs) Handles ultraPrintPreviewDialog1.PageSetupDialogDisplaying

        ' cast the sender to a UltraPrintPreviewDialog
        Dim printPreviewDialog As UltraPrintPreviewDialog = CType(sender, UltraPrintPreviewDialog)

        ' set properties on the PageSetupDialog
        e.Dialog.AllowMargins = True

        '--------------------------------------------------------
        ' to display a custom setup dialog instead set the 
        ' Cancel property to true and display your dialog here
        ' e.g.
        ' e.Cancel = True
        '  
        ' ... show custom setup dialog modally here 
        '
        ' call InvalidatePreview on the UltraPrintPreviewDialog
        ' to cause the preview to be regenerated.
        '
        ' printPreviewDialog.InvalidatePreview()
        '--------------------------------------------------------

    End Sub

C#

using Infragistics.Win;
using Infragistics.Win.Printing;
using Infragistics.Win.UltraWinGrid;
using Infragistics.Win.UltraWinScrollBar;
using Infragistics.Win.UltraWinToolbars;


		private void ultraPrintPreviewDialog1_PageSetupDialogDisplaying(object sender, Infragistics.Win.Printing.PageSetupDialogDisplayingEventArgs e)
		{
			// cast the sender to a UltraPrintPreviewDialog
			UltraPrintPreviewDialog printPreviewDialog = sender as UltraPrintPreviewDialog;

			// set properties on the PageSetupDialog
			e.Dialog.AllowMargins = true;

			//--------------------------------------------------------
			// to display a custom setup dialog instead set the 
			// Cancel property to true and display your dialog here
			// e.g.
			// e.Cancel = true;
			//
			// ... show custom setup dialog modally here 
			//
			// call InvalidatePreview on the UltraPrintPreviewDialog
			// to cause the preview to be regenerated.
			//
			// printPreviewDialog.InvalidatePreview();
			//--------------------------------------------------------

		}

Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Server 2012, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2