PdfViewer.ZoomFactor Property

Specifies the document’s zoom factor.

Namespace: DevExpress.XtraPdfViewer

Assembly: DevExpress.XtraPdfViewer.v19.2.dll

Declaration

C#

public float ZoomFactor { get; set; }

VB.NET

Public Property ZoomFactor As Single

Property Value

Type	Description
Single	A Single value, specifying the document zoom factor (as a percentage).

Remarks

Use the ZoomFactor property to specify a document zoom factor when the PdfViewer.ZoomMode property is set to Custom.

The PdfViewer.MinZoomFactor and PdfViewer.MaxZoomFactor property values determine the ZoomFactor‘s minimum and maximum values.

The code sample below specified the ZoomFactor value depending on the page height:

C#

SizeF currentPageSize = pdfViewer1.GetPageSize(pdfViewer1.CurrentPageNumber);
float dpi = 110f;
float pageHeightPixel = currentPageSize.Height * dpi;
float topBottomOffset = 40f;
pdfViewer1.ZoomMode = PdfZoomMode.Custom;
pdfViewer1.ZoomFactor = ((float)pdfViewer1.ClientSize.Height - topBottomOffset) / pageHeightPixel * 100f;

VB.NET

Dim currentPageSize As SizeF = pdfViewer1.GetPageSize(pdfViewer1.CurrentPageNumber)
Dim dpi As Single = 110F
Dim pageHeightPixel As Single = currentPageSize.Height * dpi
Dim topBottomOffset As Single = 40F
pdfViewer1.ZoomMode = PdfZoomMode.Custom
pdfViewer1.ZoomFactor = (CSng(pdfViewer1.ClientSize.Height) - topBottomOffset) / pageHeightPixel * 100F