pdf till jpg

Ta en titt på ghostscript!

Det verkar inte finnas mkt på kombinationen GS och .net... suck...

MEN

Jag har hittat en kodsnutt som funkar på winform. behöver BARA hitta vad motsvarigheten till Clipboard är i asp.net... nån som vet?

OBS du måste ha Interop.Acrobat.dll i bin mappen

ladda ner lösningen här:
http://www.codeproject.com/dotnet/pdfthumbnail.asp

using System;
using System.IO;
using System.Drawing;
using System.Configuration;
using System.Runtime.InteropServices;
using System.Runtime.InteropServices.ComTypes;

public partial class Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        // Acrobat objects
        Acrobat.CAcroPDDoc pdfDoc;
        Acrobat.CAcroPDPage pdfPage;
        Acrobat.CAcroRect pdfRect;
        Acrobat.CAcroPoint pdfPoint;

        AppSettingsReader appSettings = new AppSettingsReader();

        string pdfInputPath = appSettings.GetValue("pdfInputPath", typeof(string)).ToString();
        string pngOutputPath = appSettings.GetValue("pngOutputPath", typeof(string)).ToString();

        string templatePortraitFile = pdfInputPath + @"\pdftemplate_portrait.gif";
        string templateLandscapeFile = pdfInputPath + @"\pdftemplate_portrait.gif"; ;

        try
        {
            // Get list of files to process from the input path
            // Could change to read list from database instead
            string[] files = Directory.GetFiles(pdfInputPath, "*.pdf");

            for (int n = 0; n < files.Length; n++)
            {
                string inputFile = files[n].ToString();
                string outputFile = pngOutputPath + files[n].Substring(files[n].LastIndexOf(@"\") + 1).Replace(".pdf", ".png");

                /* Could skip if thumbnail already exists in output path
                FileInfo fi = new FileInfo(inputFile);
				if (!fi.Exists) {} */

                // Create the document (Can only create the AcroExch.PDDoc object using late-binding)
                // Note using VisualBasic helper functions, have to add reference to DLL in
                // C:\WINDOWS\Microsoft.NET\Framework\v1.1.4322\Microsoft.VisualBasic.dll
                // Will always be available as .NET framework ships with all"
				
                pdfDoc = (Acrobat.CAcroPDDoc)Microsoft.VisualBasic.Interaction.CreateObject("AcroExch.PDDoc", "");

                int ret = pdfDoc.Open(inputFile);

                if (ret == 0)
                {
                    throw new FileNotFoundException();
                }

                // Get the number of pages (to be used later if you wanted to store that information)
                int pageCount = pdfDoc.GetNumPages();

                // Get the first page
                pdfPage = (Acrobat.CAcroPDPage)pdfDoc.AcquirePage(0);

                pdfPoint = (Acrobat.CAcroPoint)pdfPage.GetSize();

                pdfRect = (Acrobat.CAcroRect)Microsoft.VisualBasic.Interaction.CreateObject("AcroExch.Rect", "");

                pdfRect.Left = 0;
                pdfRect.right = pdfPoint.x;
                pdfRect.Top = 0;
                pdfRect.bottom = pdfPoint.y;

                // 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
                // see http://www.adobe.com/support/techdocs/1dd72.htm
                [B]pdfPage.CopyToClipboard(pdfRect, 0, 0, 100);

                IDataObject clipboardData = Clipboard.GetDataObject();[/B]

                if (clipboardData.GetDataPresent(DataFormats.Bitmap))
                {
                    Bitmap pdfBitmap = (Bitmap)clipboardData.GetData(DataFormats.Bitmap);

                    // Size of generated thumbnail in pixels
                    int thumbnailWidth = 45;
                    int thumbnailHeight = 59;

                    string templateFile;

                    // Switch between portrait and landscape
                    if (pdfPoint.x < pdfPoint.y)
                    {
                        templateFile = templatePortraitFile;
                    }
                    else
                    {
                        templateFile = templateLandscapeFile;
                        // Swap width and height (little trick not using third temp variable)
                        thumbnailWidth = thumbnailWidth ^ thumbnailHeight;
                        thumbnailHeight = thumbnailWidth ^ thumbnailHeight;
                        thumbnailWidth = thumbnailWidth ^ thumbnailHeight;
                    }

                    // Load the template graphic
                    Bitmap templateBitmap = new Bitmap(templateFile);

                    // Render to small image using the bitmap class
                    Image pdfImage = pdfBitmap.GetThumbnailImage(thumbnailWidth, thumbnailHeight,
                                                                 null, IntPtr.Zero);

                    // Create new blank bitmap (+ 7 for template border)						 
                    Bitmap thumbnailBitmap = new Bitmap(thumbnailWidth + 7, thumbnailHeight + 7,
                                                        System.Drawing.Imaging.PixelFormat.Format32bppArgb);

                    // To overlayout the template with the image, we need to set the transparency
                    // http://www.sellsbrothers.com/writing/default.aspx?content=dotnetimagerecoloring.htm
                    templateBitmap.MakeTransparent();

                    using (Graphics thumbnailGraphics = Graphics.FromImage(thumbnailBitmap))
                    {
                        // Draw rendered pdf image to new blank bitmap
                        thumbnailGraphics.DrawImage(pdfImage, 2, 2, thumbnailWidth, thumbnailHeight);

                        // Draw template outline over the bitmap (pdf with show through the transparent area)
                        thumbnailGraphics.DrawImage(templateBitmap, 0, 0);

                        // Save as .png file
                        thumbnailBitmap.Save(outputFile, System.Drawing.Imaging.ImageFormat.Png);

                        Console.WriteLine("Generated thumbnail... {0}", outputFile);
                    }

                    pdfDoc.Close();

                    // Not sure how why it is to do this, but Acrobat is not the best behaved COM object
                    // see http://blogs.msdn.com/yvesdolc/archive/2004/04/17/115379.aspx
                    Marshal.ReleaseComObject(pdfPage);
                    Marshal.ReleaseComObject(pdfRect);
                    Marshal.ReleaseComObject(pdfDoc);
                }
            }
        }
        catch (System.Exception ex)
        {
            Console.Write(ex.ToString());
        }

    }
}

lucgo446 skrev:

Det verkar inte finnas mkt på kombinationen GS och .net... suck...

Nej det som finnes är ett rätt bra program som du med olika parametrar kan göra olika saker. T ex skapa pdf av bilder eller tvärtom. Detta program kan du med lätthet anropa från .NET

Hej Mc F

Det braiga programmet är GS menar du? då ska jag kolla upp syntax och hur man anropar det....

Det är lite pyssel med det, nån annan lösning? nån?

Det finns många .NET-komponenter för ändamålet. En som är gratis och ruggigt bra är

http://www.tallcomponents.com/Default.aspx?id=pdfthumbnail

Om du vill generera med "mer kontroll" så får du välja en annan komponent eller köra med ImageMagick + GhostScript, startat mha System.Diagnostics.Process

http://www.webforum.nu/showthread.php?t=134351

http://www.imagemagick.org

http://www.cs.wisc.edu/~ghost/

http://www.c-sharpcorner.com/Code/2002/July/ShellCommandsInCS.asp