private static bool ConvertPDFtoImage(Arquivos arquivo, string outputPng)
{
var output = false;
try
{
using (MagickImageCollection images = new MagickImageCollection())
{
// Lê todas as páginas do PDF como uma lista de imagens
images.Read(arquivo.CaminhoArquivo);
// Salva a quantidade de páginas do PDF
arquivo.QtdPaginas = images.Count;
// Renderiza o PDF em páginas concatenadas verticalmente
using (IMagickImage vertical = images.AppendVertically())
{
vertical.Format = MagickFormat.Png;
vertical.Density = new Density(300);
vertical.Write(outputPng);
}
// Caso não ocorra nenhum problema, retorna TRUE
output = true;
}
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
return(output);
}
public static void ParseTextImage(string tesseractPath, Arquivos file, params string[] lang)
{
string output = string.Empty;
var tempOutputFile = Path.GetTempPath() + Guid.NewGuid().ToString() + ".txt";
try
{
ProcessStartInfo info = new ProcessStartInfo();
info.WorkingDirectory = tesseractPath;
info.WindowStyle = ProcessWindowStyle.Hidden;
info.UseShellExecute = false;
info.FileName = "cmd.exe";
info.Arguments =
"/c tesseract.exe " +
// Image file.
$"\"{file.CaminhoArquivo}\"" + " " +
// Output file (tesseract add '.txt' at the end)
$"\"{tempOutputFile}\"" +
// Languages.
" -l " + string.Join("+", lang);
// Start tesseract.
Process process = Process.Start(info);
process.WaitForExit();
if (process.ExitCode == 0)
{
// Exit code: success.
output = File.ReadAllText(tempOutputFile + ".txt");
// Salva o conteudo na string conteudo
file.Conteudo = output;
file.QtdPaginas = 1;
}
else
{
//throw new Exception("Error. Tesseract stopped with an error code = " + process.ExitCode);
}
}
catch (Exception msg)
{
Console.WriteLine(msg);
}
finally
{
if (File.Exists(tempOutputFile + ".txt"))
{
File.Delete(tempOutputFile + ".txt");
}
}
}
public static void ParseTextXlsx(Arquivos file)
{
XSSFWorkbook hssfwb;
using (FileStream fl = new FileStream(file.CaminhoArquivo, FileMode.Open, FileAccess.Read))
{
hssfwb = new XSSFWorkbook(fl);
}
var extractor = new NPOI.XSSF.Extractor.XSSFExcelExtractor(hssfwb);
file.Conteudo = extractor.Text;
file.QtdPaginas = hssfwb.Count;
}
public static void ParseTextDocx(Arquivos file)
{
XWPFDocument doc;
using (FileStream fl = new FileStream(file.CaminhoArquivo, FileMode.Open, FileAccess.Read))
{
doc = new XWPFDocument(fl);
}
var extractor = new NPOI.XWPF.Extractor.XWPFWordExtractor(doc);
file.Conteudo = extractor.Text;
file.QtdPaginas = doc.GetProperties().ExtendedProperties.Pages;
}
public static void ParseTextXls(Arquivos file)
{
HSSFWorkbook hssfwb;
using (FileStream fl = new FileStream(file.CaminhoArquivo, FileMode.Open, FileAccess.Read))
{
hssfwb = new HSSFWorkbook(fl);
}
//hssfwb.getShe
//Assign the sheet
var extractor = new NPOI.HSSF.Extractor.ExcelExtractor(hssfwb);
file.Conteudo = extractor.Text;
file.QtdPaginas = hssfwb.Count;
}
public static void ParseTextTxt(Arquivos file)
{
file.Conteudo = File.ReadAllText(file.CaminhoArquivo);
file.QtdPaginas = 1;
}
public static void ParseText(string tesseractPath, Arquivos file, params string[] lang)
{
string output = string.Empty;
// Create new output file for text
var tempOutputFile = Path.GetTempPath() + Guid.NewGuid().ToString() + ".txt";
// Create new tmp file for Image convertion
//string[] tempImageFiles;
// Path of tmp image file created by imagick
IEnumerable <string> tmpImageFiles = null;
try
{
// Cria caminho para imagem convertida
var outImage = Path.GetTempPath() + Guid.NewGuid().ToString() + ".png";
var result = ConvertPDFtoImage(file, outImage);
if (!result)
{
return;
}
ProcessStartInfo info = new ProcessStartInfo();
info.WorkingDirectory = tesseractPath;
info.WindowStyle = ProcessWindowStyle.Hidden;
info.UseShellExecute = false;
info.FileName = "cmd.exe";
info.Arguments =
$"/c {Config.TESSERACT_PATH}\tesseract.exe " +
// Image file.
outImage + " " +
// Output file (tesseract add '.txt' at the end)
tempOutputFile +
// Languages.
" -l " + string.Join("+", lang);
// Start tesseract.
Process process = Process.Start(info);
process.WaitForExit();
if (process.ExitCode == 0)
{
// Exit code: success.
output = File.ReadAllText(tempOutputFile + ".txt");
// Salva o conteudo na string conteudo
file.Conteudo = output;
}
else
{
//throw new Exception("Error. Tesseract stopped with an error code = " + process.ExitCode);
}
}
catch (Exception msg)
{
Console.WriteLine(msg);
}
finally
{
//File.Delete(tempImageFile);
if (File.Exists(tempOutputFile + ".txt"))
{
File.Delete(tempOutputFile + ".txt");
}
if (tmpImageFiles != null)
{
foreach (var img in tmpImageFiles)
{
File.Delete(img);
}
}
}
}
