how to read pdf file in asp.net using c#.net

sathish kumar

hi friends....

   i want to read .pdf file using c#.net code and have to save that file ... Below is my code ... But it reads only one page of a file. I want to read all the
     pages of a file.

              Anyone help me...

            else if (extn.Equals(".pdf"))
            {
                string filePath = Server.MapPath("uploads/" + filename);
                string pdfText = string.Empty;

                PdfReader pdfreader = new PdfReader(filePath);

                //for (int page = 1; page <= pdfreader.NumberOfPages; page++)
                //{

                   ITextExtractionStrategy itextextStrat = new iTextSharp.text.pdf.parser.SimpleTextExtractionStrategy();

                   // ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();

                   String extractText = PdfTextExtractor.GetTextFromPage(pdfreader,i, itextextStrat);

                    extractText = Encoding.UTF8.GetString(ASCIIEncoding.Convert(Encoding.Default, Encoding.UTF8, Encoding.Default.GetBytes(extractText)));

                    pdfText = pdfText + extractText;

                   // byte[] bytes = Encoding.UTF8.GetBytes("?"); //bytes now holds 0xDB8C
                   // byte[] converted = Encoding.Convert(Encoding.Default, Encoding.UTF8, bytes);//converted now holds 0xC39BC592
                   //// string final = Encoding.UTF8.GetString(converted);
                   // string pdftext = Encoding.UTF8.GetString(converted);

                    pdfreader.Close();

                    query = "INSERT INTO Fileupload([category],[subcategory],[uid],[oid],[up_name],[demo1],[keyword],[fdata],[aflag],sizebyte) VALUES('" + dropcategory.SelectedValue + "','" + DropDownList1.SelectedValue + "','" + Session["user_id"].ToString() + "','" + txtOwnerId.SelectedItem + "','" + fname + "','" + demo1.Text + "','" + key + "','" +pdfText+ "',1,'" + size + "') ";

                //}
         SqlCommand cmd = new SqlCommand(query, con);

            cmd.ExecuteNonQuery();// ExecuteScalar().ToString();


   }

                   Thanks in Advance....

6 Replies

Know the answer? Post it — somebody with the same question will find it here.

Janat AlJamal6y ago
You can do this in a few lines if you use the lead ocr engine. Here is some c# sample code

private void DoOCR(string inputFile, string outputFile, DocumentFormat format)

      {

        using (IOcrEngine ocrEngine = OcrEngineManager.CreateEngine(OcrEngineType.LEAD, false))

         {

            ocrEngine.Startup(null, null, null, null);

            ocrEngine.AutoRecognizeManager.Run(inputFile, outputFile, format, null, null);

         }

      }

https://www.leadtools.com/support/forum/posts/t12068-

0
Laxmidhar Sahoo7y ago
Hi you declare the string pdfText = string.Empty; inside the else block which assign each page for each iteration of the loop .So try to declare it global ,I mean before define the method or before for loop and display after for loop
0
Usman Aziz7y ago
The following code parses the PDF document and reads text from it. It is based on GroupDocs.Parser for .NET API:
// Create an instance of Parser class
using(Parser parser = new Parser("sample.pdf"))
{
    // Extract a text into the reader
    using(TextReader reader = parser.GetText())
    {
        // Print a text from the document
        // If text extraction isn't supported, a reader is null
        Console.WriteLine(reader == null ? "Text extraction isn't supported" : reader.ReadToEnd());
    }
}
0
Mageshwaran R7y ago
Hi,
Please refer the below link, it might helps you
https://stackoverflow.com/questions/9563670/how-to-read-text-from-pdf-file-in-c-net-web-application
0
Leon D7y ago
The below solution is based on Spire.PDF library.
//Load PDF document
PdfDocument doc = new PdfDocument();
doc.LoadFromFile("Input.pdf");


StringBuilder content = new StringBuilder();

//Read text from PDF pages
foreach (PdfPageBase page in doc.Pages)
{
    content.Append(page.ExtractText());
}

//Save
String fileName = "Read.txt";
File.WriteAllText(fileName, content.ToString());
+1
brunda k14y ago
PDFParser pdfParser = new PDFParser();
// extract the text
String result = pdfParser.ExtractText(pdfFile);

http://www.codeproject.com/Articles/14170/Extract-Text-from-PDF-in-C-100-NET
0