using System;
using System.Configuration;
using System.Drawing;
using System.IO;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Drawing.Imaging;
using System.Diagnostics;
namespace Acrobat.pdf2image
{
public class Program
{
/// <summary>
/// PDF Document transformation method for the picture
，method：ConvertPDF2Image("F:\\A.pdf", "F:\\", "A", 0, 0, null, 0);
/// default value
，startPageNum default value
=1，endPageNum
default value is the total number of pages
，
/// imageFormat default value =ImageFormat.Jpeg，resolution default value = 1
/// </summary>
/// <param name="pdfInputPath">PDF file path
</param>
/// <param name="imageOutputPath">image Output Path</param>
/// <param name="imageName">imageName，Do not need to bring the extension
</param>
/// <param name="startPageNum">startPage number，default value
=1</param>
/// <param name="endPageNum">endPage number，default value= PDF Total number of pages
</param>
/// <param name="imageFormat">imageFormat</param>
/// <param name="resolution">resolution，The greater the number the more clear
，default value
=1</param>
public static void ConvertPDF2Image(string pdfInputPath, string imageOutputPath,
string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, double resolution)
{
Acrobat.CAcroPDDoc pdfDoc = null;
Acrobat.CAcroPDPage pdfPage = null;
Acrobat.CAcroRect pdfRect = null;
Acrobat.CAcroPoint pdfPoint = null;
// Create the document (Can only create the AcroExch.PDDoc object using late-binding)
// Note using VisualBasic helper functions, have to add reference to DLL
pdfDoc = (Acrobat.CAcroPDDoc)Microsoft.VisualBasic.Interaction.CreateObject("AcroExch.PDDoc", "");
// validate parameter
if (!pdfDoc
.Open(pdfInputPath
)) { throw new FileNotFoundException
(); } if (!Directory.Exists(imageOutputPath)) { Directory.CreateDirectory(imageOutputPath); }
if (startPageNum <= 0) { startPageNum = 1; }
if (endPageNum > pdfDoc.GetNumPages() || endPageNum <= 0) { endPageNum = pdfDoc.GetNumPages(); }
if (startPageNum > endPageNum) { int tempPageNum = startPageNum; startPageNum = endPageNum; endPageNum = startPageNum; }
if (imageFormat == null) { imageFormat = ImageFormat.Jpeg; }
if (resolution <= 0) { resolution = 1; }
// start to convert each page
for (int i = startPageNum; i <= endPageNum; i++)
{
pdfPage = (Acrobat.CAcroPDPage)pdfDoc.AcquirePage(i - 1);
pdfPoint = (Acrobat.CAcroPoint)pdfPage.GetSize();
pdfRect = (Acrobat.CAcroRect)Microsoft.VisualBasic.Interaction.CreateObject("AcroExch.Rect", "");
int imgWidth = (int)((double)pdfPoint.x * resolution);
int imgHeight = (int)((double)pdfPoint.y * resolution);
pdfRect.Left = 0;
pdfRect.right = (short)imgWidth;
pdfRect.Top = 0;
pdfRect.bottom = (short)imgHeight;
// Render to clipboard, scaled by 100 percent (ie. original size)
// Even though we want a smaller image, better for us to scale in .NET
// than Acrobat as it would greek out small text
pdfPage.CopyToClipboard(pdfRect, 0, 0, (short)(100 * resolution));
IDataObject clipboardData = Clipboard.GetDataObject();
if (clipboardData.GetDataPresent(DataFormats.Bitmap))
{
Bitmap pdfBitmap = (Bitmap)clipboardData.GetData(DataFormats.Bitmap);
pdfBitmap.Save(Path.Combine(imageOutputPath, imageName) + i.ToString() + "." + imageFormat.ToString(), imageFormat);
pdfBitmap.Dispose();
}
}
pdfDoc.Close();
Marshal.ReleaseComObject(pdfPage);
Marshal.ReleaseComObject(pdfRect);
Marshal.ReleaseComObject(pdfDoc);
Marshal.ReleaseComObject(pdfPoint);
}
[STAThread]
public static void Main(string[] args)
{
ConvertPDF2Image("F:\\Events.pdf", "F:\\", "A", 0, 0, null, 0);
}
}
}
