How to convert .pdf file to image free using C#.net

A c

How to convert .pdf file to image file for free using C#.net. I don't want to use any 3rd party software. please guide me.

5 Replies

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Marvin Reid4y ago
You can use the ConvertToImage method to convert a PDF file to a suitable System.Drawing.Image object. You should also try checking if the source is GDI/GID+ image compatible in the scenario that the source you are using cannot be loaded as an image. You can try the following code to accomplish this:
using (RasterCodecs codecs = new RasterCodecs())
{
      RasterImage image = codecs.Load(@"C:\test.pdf");
      ImageIncompatibleReason reason = RasterImageConverter.TestCompatible(image, true);
      PixelFormat pf = RasterImageConverter.GetNearestPixelFormat(image);
      Console.WriteLine("TestCompatible: {0}", reason);
      Console.WriteLine("GetNearestPixelFormat:{0}", pf);

      if (reason != ImageIncompatibleReason.Compatible)
      {
         RasterImageConverter.MakeCompatible(image, pf, true);
      }
      Image destImage = RasterImageConverter.ConvertToImage(image, ConvertToImageOptions.None));
}
https://www.leadtools.com/help/sdk/v22/dh/ld/rasterimageconverter-converttoimage.html
https://www.leadtools.com/help/sdk/v22/dh/ld/rasterimageconverter-makecompatible.html
Leon D4y ago
You can use Free Spire.PDF to convert PDF to Image.
https://www.e-iceblue.com/Download/download-pdf-for-net-free.html
//Pdf file
String file = @"..\..\..\..\..\..\Data\ToImage.pdf";

//Open pdf document
PdfDocument doc = new PdfDocument();
doc.LoadFromFile(file);

//Save to images
for (int i = 0; i < doc.Pages.Count; i++)
{
    String fileName = String.Format("ToImage-img-{0}.png", i);
    using (Image image = doc.SaveAsImage(i,300,300))
    {
        image.Save(fileName, System.Drawing.Imaging.ImageFormat.Png);
        System.Diagnostics.Process.Start(fileName);
    }
}

doc.Close();
For more information, click this link:
https://www.e-iceblue.com/Tutorials/Spire.PDF/Spire.PDF-Program-Guide/Convert-PDF-Page-to-Image-with-C-code.html
Satya Karki4y ago
You can use Spire.Pdf

Sample

PdfDocument pdfdocument = new PdfDocument("Sample.pdf");
for(int i=0;i< pdfdocument.Pages.Count;i++)
{
System.Drawing.Image image= pdfdocument.SaveAsImage(i, 96, 96);
image.Save(string.Format("ImagePage{0}.png", i), System.Drawing.Imaging.ImageFormat.Png);
}
Rijwan Ansari4y ago
Hi
You can do in this way
Class to convert.
public class TiffImage
{
    private string myPath;
    private Guid myGuid;
    private FrameDimension myDimension;
    public ArrayList myImages = new ArrayList();
    private int myPageCount;
    private Bitmap myBMP;

    public TiffImage(string path)
    {
        MemoryStream ms;
        Image myImage;

        myPath = path;
        FileStream fs = new FileStream(myPath, FileMode.Open);
        myImage = Image.FromStream(fs);
        myGuid = myImage.FrameDimensionsList[0];
        myDimension = new FrameDimension(myGuid);
        myPageCount = myImage.GetFrameCount(myDimension);
        for (int i = 0; i < myPageCount; i++)
        {
            ms = new MemoryStream();
            myImage.SelectActiveFrame(myDimension, i);
            myImage.Save(ms, ImageFormat.Bmp);
            myBMP = new Bitmap(ms);
            myImages.Add(myBMP);
            ms.Close();
        }
        fs.Close();
    }
}
How to use it.
private void button1_Click(object sender, EventArgs e)
{
    TiffImage myTiff = new TiffImage("D:\\Some.tif");
    //imageBox is a PictureBox control, and the [] operators pass back
    //the Bitmap stored at that position in the myImages ArrayList in the TiffImage
    this.pictureBox1.Image = (Bitmap)myTiff.myImages[0];
    this.pictureBox2.Image = (Bitmap)myTiff.myImages[1];
    this.pictureBox3.Image = (Bitmap)myTiff.myImages[2];
}
Srinivasan Ramamoorthi4y ago
Check this link

https://www.c-sharpcorner.com/forums/how-to-convert-pdf-to-image-in-c-sharp