How to print PDF with PDF Renderer SDK in C# and VB.NET

The following samples show how to print PDF from your applications in C# and Visual Basic .NET using Bytescout PDF Renderer SDK.

C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Imaging;
using System.Text;
using System.Windows.Forms;

using Bytescout.PDFRenderer;

namespace PrintPDF
{
public partial class Form1 : Form
{
private string _document = @”multipage.pdf”;
RasterRenderer _rasterRenderer = null;
private int _page = 0;

public Form1()
{
InitializeComponent();

// Create an instance of Bytescout.PDFRenderer.RasterRenderer object and register it.
_rasterRenderer = new RasterRenderer();
_rasterRenderer.RegistrationName = “demo”;
_rasterRenderer.RegistrationKey = “demo”;
}

private void Form1_Load(object sender, EventArgs e)
{
Cursor = Cursors.WaitCursor;

try
{
// Load PDF document.
_rasterRenderer.LoadDocumentFromFile(_document);
}
catch (Exception exception)
{
MessageBox.Show(“Failed to open PDF document.rn” + exception.Message);
}
finally
{
Cursor = Cursors.Default;
}
}

private void buttonPageSetup_Click(object sender, EventArgs e)
{
pageSetupDialog1.ShowDialog();
}

private void buttonPrintPreview_Click(object sender, EventArgs e)
{
_page = 0;
printPreviewDialog1.Width = 800;
printPreviewDialog1.Height = 600;
printPreviewDialog1.ShowDialog();
}

private void buttonPrint_Click(object sender, EventArgs e)
{
if (printDialog1.ShowDialog() == DialogResult.OK)
{
printDocument1.Print();
}
}

private void printDocument1_PrintPage(object sender, System.Drawing.Printing.PrintPageEventArgs e)
{
Cursor = Cursors.WaitCursor;

try
{
using (VectorRenderer vectorRenderer = new VectorRenderer(“demo”, “demo”))
{
vectorRenderer.LoadDocumentFromFile(_document);

Rectangle printRect = e.MarginBounds;

using (Metafile image = vectorRenderer.RenderPageToMetafile(_page))
{
// calculate print rectangle
float ratio = printRect.Width / (float) image.Width;
int width = printRect.Width;
int height = (int) (image.Height * ratio);

if (height > printRect.Height)
{
ratio = printRect.Height / (float) image.Height;
width = (int) (image.Width * ratio);
height = printRect.Height;
}

// draw page on device
e.Graphics.DrawImage(image, new Rectangle(printRect.X, printRect.Y, width, height),
new Rectangle(0, 0, image.Width, image.Height), GraphicsUnit.Pixel);
}

if (_page < vectorRenderer.GetPageCount() - 1) { _page++; e.HasMorePages = true; } } } finally { Cursor = Cursors.Default; } } } }[/vb]

VB.NET

Imports System.Collections.Generic
Imports System.ComponentModel
Imports System.Data
Imports System.Drawing
Imports System.Drawing.Imaging
Imports System.Text
Imports System.Windows.Forms

Imports Bytescout.PDFRenderer

Public Partial Class Form1
Inherits Form
Private _document As String = “multipage.pdf”
Private _rasterRenderer As RasterRenderer = Nothing
Private _page As Integer = 0

Public Sub New()
InitializeComponent()

‘ Create an instance of Bytescout.PDFRenderer.RasterRenderer object and register it.
_rasterRenderer = New RasterRenderer()
_rasterRenderer.RegistrationName = “demo”
_rasterRenderer.RegistrationKey = “demo”
End Sub

Private Sub Form1_Load(sender As Object, e As EventArgs)
Cursor = Cursors.WaitCursor

Try
‘ Load PDF document.
_rasterRenderer.LoadDocumentFromFile(_document)
Catch exception As Exception
MessageBox.Show(“Failed to open PDF document.” & vbCr & vbLf & exception.Message)
Finally
Cursor = Cursors.[Default]
End Try
End Sub

Private Sub buttonPageSetup_Click(sender As Object, e As EventArgs)
pageSetupDialog1.ShowDialog()
End Sub

Private Sub buttonPrintPreview_Click(sender As Object, e As EventArgs)
_page = 0
printPreviewDialog1.Width = 800
printPreviewDialog1.Height = 600
printPreviewDialog1.ShowDialog()
End Sub

Private Sub buttonPrint_Click(sender As Object, e As EventArgs)
If printDialog1.ShowDialog() = DialogResult.OK Then
printDocument1.Print()
End If
End Sub

Private Sub printDocument1_PrintPage(sender As Object, e As System.Drawing.Printing.PrintPageEventArgs)
Cursor = Cursors.WaitCursor

Try
Using vectorRenderer As New VectorRenderer(“demo”, “demo”)
vectorRenderer.LoadDocumentFromFile(_document)

Dim printRect As Rectangle = e.MarginBounds

Using image As Metafile = vectorRenderer.RenderPageToMetafile(_page)
‘ calculate print rectangle
Dim ratio As Single = printRect.Width / CSng(image.Width)
Dim width As Integer = printRect.Width
Dim height As Integer = CInt(Math.Truncate(image.Height * ratio))

If height > printRect.Height Then
ratio = printRect.Height / CSng(image.Height)
width = CInt(Math.Truncate(image.Width * ratio))
height = printRect.Height
End If

‘ draw page on device
e.Graphics.DrawImage(image, New Rectangle(printRect.X, printRect.Y, width, height), New Rectangle(0, 0, image.Width, image.Height), GraphicsUnit.Pixel)
End Using

If _page < vectorRenderer.GetPageCount() - 1 Then _page += 1 e.HasMorePages = True End If End Using Finally Cursor = Cursors.[Default] End Try End Sub End Class [/vb]