In this article, we are going to learn how to Extract images from PDF file using itextsharp in asp.net with C#. First, you need to download iTextSharp dll from the internet. Click on the link to download https://github.com/itext/itextsharp.

Related article:

Once file is downloaded, extract it, now you will find 6 more .rar file. Again extract itextsharp-dll-core.rar file, after that add reference of itextsharp.dll to your project.

In code-behind file:

Add below nampespaces.

using System.IO;
using iTextSharp.text.pdf;
using iTextSharp.text.pdf.parser;

Complete C# code:

namespace WebApplication1
{
public partial class WebForm1 : System.Web.UI.Page
    {
protected void Page_Load(object sender, EventArgs e)
        {
if (!IsPostBack)
            {
                ExtractImage();
            }
        }

public void ExtractImage()
        {
// existing pdf path
            PdfReader reader = new PdfReader("E:/Example.pdf");
            PRStream pst;
            PdfImageObject pio;
            PdfObject po;
// number of objects in pdf document
int n = reader.XrefSize;
            FileStream fs = null;
// set image file location
            String path = "E:/";
for (int i = 0; i             {
// get the object at the index i in the objects collection
                po = reader.GetPdfObject(i);
// object not found so continue
if (po == null || !po.IsStream())
continue;
//cast object to stream
                pst = (PRStream)po;
//get the object type
                PdfObject type = pst.Get(PdfName.SUBTYPE);
//check if the object is the image type object
if (type != null && type.ToString().Equals(PdfName.IMAGE.ToString()))
                {
//get the image
                    pio = new PdfImageObject(pst);
                    fs = new FileStream(path + "image" + i + ".jpg", FileMode.Create);
//read bytes of image in to an array
byte[] imgdata = pio.GetImageAsBytes();
//write the bytes array to file
                    fs.Write(imgdata, 0, imgdata.Length);
                    fs.Flush();
                    fs.Close();
                }
            }
        }
    }
}