(Extract Text from PDF)...It gives an error : cannot convert from 'byte[]' to 'iTextSharp.text.pdf.RandomAccessFileOrArray

Question

1.00/5 (1 vote)

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C#

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using iTextSharp.text;
using iTextSharp.text.pdf;
using System.IO;
using PDFjet.NET;

namespace PDFtoTextConversion
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Document newDoc = new Document(PageSize.A2.Rotate());

            try
            {

                richTextBox1.Text = extractPDFText(@"D:\pdffile\windows_server_2003_c4.pdf", 3, 4);
            }
            catch (DocumentException de)
            {
                MessageBox.Show(de.Message);
            }
            catch (IOException ioEx)
            {
                MessageBox.Show(ioEx.Message);
            }
            finally
            {
                newDoc.Close();
            }
        }
        public string extractPDFText(string sourcePDF, int fromPageNo, int toPageNo)
        {
            StringBuilder sb = new StringBuilder();
            PdfReader reader = new PdfReader(sourcePDF);
            byte[] pageBytes = null;
            PRTokeniser token = null;
            int tokenType = -1;
            string tokenValue = string.Empty;

            if (fromPageNo == 0)
            {
                fromPageNo = 1;
            }

            if (toPageNo == 0)
            {
                toPageNo = reader.NumberOfPages;
            }

            for (int i = fromPageNo; i &lt; toPageNo; i++)
            {
                pageBytes = reader.GetPageContent(i);

                if (pageBytes != null)
                {
                    token = new PRTokeniser(pageBytes);
                    while (token.NextToken())
                    {
                        tokenType = (int)token.TokenType;
                        tokenValue = token.StringValue;
                        if (tokenType == (int)PRTokeniser.TokType.STRING)
                        {
                            sb.Append(token.StringValue);
                        }
                        else if (tokenType == 1 && tokenValue.Equals("-600"))
                        {
                            sb.Append(" ");
                        }
                        else if (tokenType == 10 && tokenValue.Equals("TJ"))
                        {
                            sb.Append(" ");
                        }
                    }
                }
            }

            return sb.ToString();
        }
    }
}

Posted 21-Jan-13 19:04pm

Sachin_Sharma(10)

Updated 21-Jan-13 19:11pm

Sergey Alexandrovich Kryukov

v2

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Comments

Sergey Alexandrovich Kryukov 22-Jan-13 1:10am

In what line?
And what is unclear in error message? See a help page on this type...
—SA

Sachin_Sharma(10) 22-Jan-13 1:16am

token = new PRTokeniser(pageBytes);
In this line it says: The best overloaded method match for 'iTextSharp.text.pdf.PRTokeniser.PRTokeniser(iTextSharp.text.pdf.RandomAccessFileOrArray)' has some invalid arguments

Sachin_Sharma(10) 22-Jan-13 1:23am

Can you help?

Sergey Alexandrovich Kryukov 22-Jan-13 1:28am

Well, thanks for clarification. Next time, just comment a line with the error in code and refer to this comment in the text of the question. I don't know what needs help... well, tried. Please see my answer.
—SA

Sachin_Sharma(10) 22-Jan-13 2:23am

Thanks to you sir, I make you sure next time I'll comment the line ...

Sergey Alexandrovich Kryukov 22-Jan-13 2:36am

Good. You are very welcome.
Good luck, call again.
—SA

2 solutions

Solution 2

const string sourcePdf = @"c:\temp\arquivo.pdf";
var sb = new StringBuilder();
var reader = new PdfReader(sourcePdf);

var fromPageNo = 0;
if (fromPageNo == 0)
{
	fromPageNo = 1;
}

var toPageNo = 0;
if (toPageNo == 0)
{
	toPageNo = reader.NumberOfPages;
}

for (int i = fromPageNo; i < toPageNo; i++)
{
	byte[] pageBytes = reader.GetPageContent(i);

	if (pageBytes != null)
	{
		var token = new PRTokeniser(new RandomAccessFileOrArray(pageBytes));
		while (token.NextToken())
		{
			var tokenType = (int)token.TokenType;
			var tokenValue = token.StringValue;
			if (tokenType == (int)PRTokeniser.TokType.STRING)
			{
				sb.Append(token.StringValue);
			}
			else if (tokenType == 1 && tokenValue.Equals("-600"))
			{
				sb.Append(" ");
			}
			else if (tokenType == 10 && tokenValue.Equals("TJ"))
			{
				sb.Append("-> ");
			}
		}
	}
}

Console.WriteLine(sb.ToString());
Console.ReadKey();

https://www.youtube.com/user/tutorialnacional[]

Posted 7-Mar-15 13:17pm

Member 11247984

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Sergey Alexandrovich Kryukov · Accepted Answer · 2013-01-21T19:26:00

This is what is required for the parameter of this constructor:
http://api.itextpdf.com/itext/com/itextpdf/text/pdf/RandomAccessFileOrArray.html[^].

And, according to the error message, you are trying to pass byte[], which is apparently not assignment-compatible with required type. What could be more clear?

The requires type implements this interface: http://docs.oracle.com/javase/1.5.0/docs/api/java/io/DataInput.html[^].

So, the page referenced above shows how to pass data to the instance of the class uses as a parameter of the constructor. And so on…

Probably, your problem is really just the style of your work. I don't know what is the exact problem, but instead of just reading the documentation step by step and implementing your steps accordingly, you… are doing who knows what, may be trial-and-error, and asking strange questions. You need to act in a straightforward way. Everything is well documented.

—SA