Extract text from PDF documents

To extract a text from PDF documents GetText and GetText(pageIndex) method is used. These methods allow to extract a text from the entire document or a text from the selected page.

Here are the steps to extract a text from PDF document:

  • Instantiate Parser object for the initial document;
  • Call GetText method and obtain TextReader object;
  • Read a text from reader.

The following example demonstrates how to extract a text from PDF document:

// Create an instance of Parser class
using(Parser parser = new Parser(filePath))
{
    // Extract a text into the reader
    using(TextReader reader = parser.GetText())
    {
        // Print a text from the document
        Console.WriteLine(reader.ReadToEnd());
    }
}

Here are the steps to extract a text from the page of PDF document:

The following example demonstrates how to extract a text from the page of PDF document:

// Create an instance of Parser class
using(Parser parser = new Parser(filePath))
{
    // Get the document info
    IDocumentInfo documentInfo = parser.GetDocumentInfo();
   
    // Iterate over pages
    for(int p = 0; p < documentInfo.PageCount; p++)
    {
        // Print a page number 
        Console.WriteLine(string.Format("Page {0}/{1}", p + 1, documentInfo.PageCount));
   
        // Extract a text into the reader
        using(TextReader reader = parser.GetText(p))
        {
            // Print a text from the document
            Console.WriteLine(reader.ReadToEnd());
        }
    }
}

Raw mode allows to increase the speed of text extraction due to poor formatting accuracy. GetText(TextOptions) and GetText(pageIndex, TextOptions) methods are used to extract a text in raw mode.

Here are the steps to extract a raw text from the page of PDF document:

The following example demonstrates how to extract a raw text from the page of PDF document:

// Create an instance of Parser class
using (Parser parser = new Parser(filePath))
{
    // Get the document info
    IDocumentInfo documentInfo = parser.GetDocumentInfo();
    // Check if the document has pages
    if (documentInfo == null || documentInfo.RawPageCount == 0)
    {
        Console.WriteLine("Document hasn't pages.");
        return;
    }
    // Iterate over pages
    for (int p = 0; p < documentInfo.RawPageCount; p++)
    {
        // Print a pagenumber 
        Console.WriteLine(string.Format("Slide {0}/{1}", p + 1, documentInfo.RawPageCount));
        // Extract a text into the reader
        using (TextReader reader = parser.GetText(p, new TextOptions(true)))
        {
            // Print a text from the document page
            Console.WriteLine(reader.ReadToEnd());
        }
    }
}

More resources

GitHub examples

You may easily run the code above and see the feature in action in our GitHub examples:

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