/// <summary>
/// Extract all the text from the specified pages within the PDF document.
/// </summary>
/// <param name="pdf">The PDf stream.</param>
/// <param name="pages">The list of page numbers to extract text from.</param>
/// <param name="password">The password used to protect the document.</param>
/// <param name="encoding">The encoding the extracted text should be converted to; the default is UTF8</param>
/// <returns>The complete text extracted.</returns>
public StringBuilder ExtractText(Stream pdf, int[] pages, string password = "", Nequeo.Text.EncodingType encoding = Text.EncodingType.UTF8)
{
byte[] pass = null;
StringBuilder text = new StringBuilder();
iTextSharp.text.pdf.PdfReader pdfReader = null;
try
{
// If no password.
if (String.IsNullOrEmpty(password))
{
pdfReader = new iTextSharp.text.pdf.PdfReader(pdf);
}
else
{
pass = Encoding.Default.GetBytes(password);
pdfReader = new iTextSharp.text.pdf.PdfReader(pdf, pass);
}
// For each page.
foreach (int page in pages)
{
// If within page interval the extract text.
if (page >= 1 || page <= pdfReader.NumberOfPages)
{
// Create the PDF text extractor.
ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
string currentText = PdfTextExtractor.GetTextFromPage(pdfReader, page, strategy);
// Convert the text into UTF8.
currentText = Nequeo.Text.Encoding.Convert(currentText + "\r\n", encoding);
text.Append(currentText);
}
}
}
catch (Exception)
{
throw;
}
finally
{
if (pdfReader != null)
{
pdfReader.Close();
}
}
// Return the text.
return(text);
}
/// <summary>
/// Extract all the text from each page within the PDF document.
/// </summary>
/// <param name="pdf">The PDf stream.</param>
/// <param name="password">The password used to protect the document.</param>
/// <param name="encoding">The encoding the extracted text should be converted to; the default is UTF8</param>
/// <returns>The complete text extracted.</returns>
public StringBuilder ExtractText(Stream pdf, string password = "", Nequeo.Text.EncodingType encoding = Text.EncodingType.UTF8)
{
return(ExtractText(pdf, 1, Int32.MaxValue, password, encoding));
}
/// <summary>
/// Extract all the text from the specified page interval within the PDF document.
/// </summary>
/// <param name="pdf">The PDf stream.</param>
/// <param name="fromPage">From page (must be greater than zero).</param>
/// <param name="toPage">To page (must be greater than zero).</param>
/// <param name="password">The password used to protect the document.</param>
/// <param name="encoding">The encoding the extracted text should be converted to; the default is UTF8</param>
/// <returns>The complete text extracted.</returns>
public StringBuilder ExtractText(Stream pdf, int fromPage, int toPage = Int32.MaxValue, string password = "", Nequeo.Text.EncodingType encoding = Text.EncodingType.UTF8)
{
byte[] pass = null;
StringBuilder text = new StringBuilder();
iTextSharp.text.pdf.PdfReader pdfReader = null;
try
{
// If no password.
if (String.IsNullOrEmpty(password))
{
pdfReader = new iTextSharp.text.pdf.PdfReader(pdf);
}
else
{
pass = Encoding.Default.GetBytes(password);
pdfReader = new iTextSharp.text.pdf.PdfReader(pdf, pass);
}
// Get the page list.
int toPageInt = (toPage > pdfReader.NumberOfPages ? pdfReader.NumberOfPages : (toPage < 1 ? 1 : toPage));
int fromPageInt = (fromPage < 1 ? 1 : (toPage < fromPage ? toPage : fromPage));
// For each page.
for (int page = fromPageInt; page <= toPageInt; page++)
{
// Create the PDF text extractor.
ITextExtractionStrategy strategy = new SimpleTextExtractionStrategy();
string currentText = PdfTextExtractor.GetTextFromPage(pdfReader, page, strategy);
// Convert the text into UTF8.
currentText = Nequeo.Text.Encoding.Convert(currentText + "\r\n", encoding);
text.Append(currentText);
}
}
catch (Exception)
{
throw;
}
finally
{
if (pdfReader != null)
{
pdfReader.Close();
}
}
// Return the text.
return(text);
}
