/// <summary>
/// Exports the PDF pages as Tiff Images.
/// </summary>
/// <param name="fileName">The PDF file name</param>
private void ExportPDFtoTiff(string fileName)
{
PdfDocumentView pdfViewer = new PdfDocumentView();
//Load the input PDF file
pdfViewer.Load(fileName);
//Export the images From the input PDF file at the page range of 0 to 1 .
BitmapSource[] image = pdfViewer.ExportAsImage(0, pdfViewer.PageCount - 1);
if (image != null)
{
for (int i = 0; i < image.Length; i++)
{
//Initialize the new Tiff bitmap encoder
TiffBitmapEncoder encoder = new TiffBitmapEncoder();
//Set the compression to zip to reduce the file size.
encoder.Compression = TiffCompressOption.Zip;
//Create the bitmap frame using the bitmap source and add it to the encoder.
encoder.Frames.Add(BitmapFrame.Create(image[i]));
//Create the file stream for the output in the desired image format.
using (FileStream stream = new FileStream("Image_" + i.ToString() + ".Tiff", FileMode.Create))
{
//Save the stream, so that the image will be generated in the output location.
encoder.Save(stream);
}
}
}
}
public string ConvertPdfToImage(string inputFilePath)
{
var imgPath = string.Empty;
using (var viewer = new PdfDocumentView())
{
var file = new FileInfo(inputFilePath);
viewer.Load(file.FullName);
var images = viewer.ExportAsImage(PageNumber - 1, PageNumber - 1);
imgPath = Path.Combine(Common.TempStorage, $"{file.Name.Substring(0, file.Name.Length - 4)}.png");
var resizedPath = Path.Combine(Common.UserCriteriaStorage, $"{file.Name.Substring(0, file.Name.Length - 4)}-R.png");
var image = images[0];
if (File.Exists(imgPath))
{
File.Delete(imgPath);
}
image.Save(imgPath);
double scaleFactor = 0;
var resize = false;
using (var bmp = Image.FromFile(imgPath))
{
if (bmp.Size.Width > 1428)
{
scaleFactor = 1428.0 / Convert.ToDouble(bmp.Size.Width);
resize = true;
}
}
if (resize)
{
Common.Resize(imgPath, resizedPath, scaleFactor);
}
}
return(imgPath);
}
void ExportPages(Window window)
{
int from = StartPageNumber - 1;
int to = EndPageNumber - 1;
if (from > to)
{
MessageBox.Show("The 'From' value cannot be greater than the 'To' value.", "Error");
return;
}
BitmapSource image = null;
BitmapSource[] images = null;
if (from == to)
{
image = pdfViewer.ExportAsImage(from);
}
else
{
images = pdfViewer.ExportAsImage(from, to);
}
#if NET50
string output = @"ExportasImage\";
System.IO.Directory.CreateDirectory(@"ExportasImage\");
#else
string output = @"ExportasImage\";
System.IO.Directory.CreateDirectory(@"ExportasImage\");
#endif
BitmapEncoder encoder = null;
if (image != null)
{
encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(image));
using (FileStream stream = new FileStream(output + Guid.NewGuid().ToString() + ".png", FileMode.Create))
{
encoder.Save(stream);
}
}
else
{
foreach (BitmapSource img in images)
{
encoder = new PngBitmapEncoder();
encoder.Frames.Add(BitmapFrame.Create(img));
using (FileStream stream = new FileStream(output + Guid.NewGuid().ToString() + ".png", FileMode.Create))
{
encoder.Save(stream);
}
}
}
if (image != null || images != null)
{
//Message box confirmation to view the created PDF document.
if (System.Windows.MessageBox.Show("Do you want to view the exported image files?", "Image Exported",
MessageBoxButton.YesNo, MessageBoxImage.Information) == MessageBoxResult.Yes)
{
//Launching the PDF file using the default Application.[Acrobat Reader]
#if NET50
System.Diagnostics.Process process = new System.Diagnostics.Process();
process.StartInfo = new System.Diagnostics.ProcessStartInfo(@"ExportasImage\")
{
UseShellExecute = true
};
process.Start();
#else
System.Diagnostics.Process.Start(@"ExportasImage\");
#endif
if (window != null)
{
window.Close();
}
}
else
// Exit
if (window != null)
{
window.Close();
}
pdfViewer.Unload(true);
}
}
