/// <summary>
/// Konvertiert die PDF-Datei in Tiff-Dateien.
/// Gibt eine liste mit den Pfaden der Tiff-Dateien zurück.
/// </summary>
public List <string> ConvertPDFToImage(string pathFolder, bool tempPrefix, DocumentParam param)
{
List <string> list = new List <string>();
try
{
if (string.CompareOrdinal(pathFolder, string.Empty) == 0)
{
return(list);
}
FileInfo fileInfo = new FileInfo(param.FilePath);
if (fileInfo.Exists == false)
{
return(list);
}
FilesFunctions.DeleteFilesInFolder(pathFolder, Tiff);
// open existing PDF document
using (PdfDocument pdfDocument = new PdfDocument(param.FilePath, true))
{
// set resolution
//pdfDocument.RenderingSettings.Resolution = new Resolution(param.Resolution, param.Resolution);
//// set rendering mode - optimal balance between rendering speed and quality
//pdfDocument.RenderingSettings.RenderingMode = PdfRenderingMode.HighSpeed;
for (int pageCount = 0; pageCount < pdfDocument.Pages.Count; pageCount++)
{
string tempName = FilesFunctions.GetRandomName(pathFolder, fileInfo, tempPrefix, Tiff);
// create new TIFF file
using (TiffFile tiffFile = new TiffFile(tempName, TiffFileFormat.LittleEndian))
{
tiffFile.Pages.EncoderSettings.Compression = TiffCompression.Zip;
tiffFile.Pages.Add(pdfDocument.Pages[pageCount].Render());
tiffFile.SaveChanges();
list.Add(tempName);
}
}
}
return(list);
}
catch (Exception ex)
{
FileLogger.FileLogger.Instance.WriteExeption(ex);
return(list);
}
}
//public bool Colour { get; set; }
//public int Compression { get; set; }
//public bool KeepOriginal { get; set; }
/// <summary>
/// Von dem PDF-Dokument wird die erste Seite in tiff konvertiert und gespeichert.
/// die funktion liefert den Path zu der neue Datei zurück.
/// </summary>
public string GetFirstPageAsImageFromDocument(DocumentParam param)
{
try
{
string fileName = string.Empty;
FileInfo fileInfo = new FileInfo(param.FilePath);
if (fileInfo.Exists == false)
{
return(fileName);
}
string pathFolder = Path.GetTempPath();
using (PdfDocument pdfDocument = new PdfDocument(param.FilePath, true))
{
// set resolution
pdfDocument.RenderingSettings.Resolution = new Resolution(param.Resolution, param.Resolution);
// set rendering mode - optimal balance between rendering speed and quality
pdfDocument.RenderingSettings.RenderingMode = PdfRenderingMode.HighQuality;
string tempName = FilesFunctions.GetRandomName(pathFolder, fileInfo, true, Tiff);
for (int pageCount = 0; pageCount < pdfDocument.Pages.Count; pageCount++)
{
// create new TIFF file
using (TiffFile tiffFile = new TiffFile(tempName, TiffFileFormat.LittleEndian))
{
tiffFile.Pages.EncoderSettings.Compression = TiffCompression.Lzw;
tiffFile.Pages.Add(pdfDocument.Pages[pageCount].Render());
tiffFile.SaveChanges();
fileName = tempName;
}
}
}
return(fileName);
}
catch (Exception ex)
{
FileLogger.FileLogger.Instance.WriteExeption(ex);
return(string.Empty);
}
}
