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How to set a zoom level to view the page in PDF document using C# and VB.NET
5 mins read
Syncfusion Essential® PDF is a .NET PDF library used to create, read, and edit PDF documents. Using this library, you can set the zoom level to view a page in the PDF document.
Steps to set a zoom level to view the page in PDF document programmatically:
- Create a new C# console application project.
- Install the Syncfusion.pdf.Winforms NuGet package as a reference to your .NET Framework application from the NuGet.org.
- Include the following namespaces in Program.cs file.
C#
using Syncfusion.Pdf; using Syncfusion.Pdf.Graphics; using Syncfusion.Pdf.Interactive; using System.Drawing;
VB.NET
Imports Syncfusion.Pdf Imports Syncfusion.Pdf.Graphics Imports Syncfusion.Pdf.Interactive Imports System.Drawing
- Use the following code snippet to set a zoom level to view the page in PDF document.
C#
//Create a new PDF document
PdfDocument document = new PdfDocument();
// Set the page size
document.PageSettings.Size = PdfPageSize.A4;
//Add a page to the document
PdfPage page = document.Pages.Add();
//Create PDF graphics for the page
PdfGraphics graphics = page.Graphics;
//Set the font
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 20);
//Draw the text
graphics.DrawString("Hello World!!!", font, PdfBrushes.Black, new PointF(0, 500));
//Create an instance for named destination
PdfDestination destination = new PdfDestination(page, new PointF(0, 500));
destination.Zoom = 2f;
//Set the goto action
PdfGoToAction gotoAction = new PdfGoToAction(destination);
document.Actions.AfterOpen = gotoAction;
//Save the document
document.Save("Output.pdf");
//Close the document
document.Close(true);
//This will open the PDF file so, the result will be seen in default PDF viewer
System.Diagnostics.Process.Start("Output.pdf");
VB.NET
'Create a New PDF document
Dim document As PdfDocument = New PdfDocument()
'Set the page size
document.PageSettings.Size = PdfPageSize.A4
'Add a page to the document
Dim page As PdfPage = document.Pages.Add()
'Create PDF graphics for the page
Dim graphics As PdfGraphics = page.Graphics
'Set the font
Dim font As PdfFont = New PdfStandardFont(PdfFontFamily.Helvetica, 20)
'Draw the text
graphics.DrawString("Hello World!!!", font, PdfBrushes.Black, New PointF(0, 500))
'Create an instance for named destination
Dim destination As PdfDestination = New PdfDestination(page, New PointF(0, 500))
destination.Zoom = 2.0F
'Set the goto action
Dim gotoAction As PdfGoToAction = New PdfGoToAction(destination)
document.Actions.AfterOpen = gotoAction
'Save the document
document.Save("Output.pdf")
'Close the document
document.Close(True)
'This will open the PDF file so, the result will be seen in default PDF viewer
System.Diagnostics.Process.Start("Output.pdf")
A complete working sample can be downloaded from PDFSample.zip.
Take a moment to peruse the documentation, where you can find other options like supported action type, adding action to form field, and adding action to bookmark with code example.
Note:
Starting with v16.2.0.x, if you reference Syncfusion® assemblies from trial setup or the NuGet feed, include a license key in your projects. Refer to the link to learn about generating and registering the Syncfusion® license key in your application to use the components without trail message.
