private Image GetImageFromPage(PdfImageViewer viewer, int pageIndex)
{
string[] names = viewer.GetImageNames(pageIndex);
ArrayList images = new ArrayList();
for (int i = 0; i < names.Length; i++)
{
try
{
images.Add(viewer.GetImage(pageIndex, names[i]));
}
catch (Exception e)
{
MessageBox.Show(string.Format("Image '{0}': {1}", names[i], e.Message), "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
if (images.Count == 0)
{
return(null);
}
if (images.Count == 1)
{
return((Image)images[0]);
}
// merge images
int padding = 5;
int heigth = 0;
int width = 0;
int n = images.Count;
for (int i = 0; i < n; i++)
{
Image current = (Image)images[i];
if (width < current.Width)
{
width = current.Width;
}
heigth += current.Height;
}
width += 3;
heigth += (n + 1) * padding;
Bitmap result = new Bitmap(width, heigth, System.Drawing.Imaging.PixelFormat.Format24bppRgb);
Graphics g = Graphics.FromImage(result);
g.FillRectangle(Brushes.White, new Rectangle(0, 0, width, heigth));
int dy = 1;
for (int i = 0; i < n; i++)
{
Image current = (Image)images[i];
g.DrawImageUnscaled(current, new Point(1, dy));
dy += current.Height + padding;
current.Dispose();
}
g.Dispose();
return(result);
}
public Image SelectImage(string pdfFileName)
{
PdfImageViewer viewer;
try
{
viewer = new PdfImageViewer(pdfFileName);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(null);
}
try
{
pages.Items.Clear();
for (int i = 0; i < viewer.PageCount; i++)
{
int k = viewer.GetImageNames(i).Length;
if (k > 0)
{
pages.Items.Add(i + 1);
}
}
if (pages.Items.Count == 0)
{
MessageBox.Show("Images in PDF file are not found.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
return(null);
}
pages.SelectedIndex = 0;
if (pages.Items.Count == 1)
{
return(GetImageFromPage(viewer, 0));
}
label1.Text = string.Format(_labelText, pages.Items.Count);
_selected = false;
ShowDialog();
if (_selected)
{
Image result = GetImageFromPage(viewer, (int)pages.SelectedItem - 1);
return(result);
}
return(null);
}
finally
{
viewer.Dispose();
}
}
/// <summary>
/// Select PDF page and returns page images as single image.
/// </summary>
public static BitmapSource SelectPdfPageImage(string filename, ref int pageIndex)
{
// create PdfImageViewer
PdfImageViewer viewer;
try
{
viewer = new PdfImageViewer(filename);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message, "Error", MessageBoxButton.OK, MessageBoxImage.Error);
return(null);
}
try
{
// collect pages with images
List <int> pageWithImages = new List <int>();
for (int i = 0; i < viewer.PageCount; i++)
{
string[] imageNames = viewer.GetImageNames(i);
if (imageNames.Length > 0)
{
pageWithImages.Add(i);
}
}
if (pageWithImages.Count == 0)
{
MessageBox.Show("Images in PDF file are not found.", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
return(null);
}
if (pageWithImages.Count > 1)
{
// select page
SelectPdfPageWindow selectPdfPageWindow = new SelectPdfPageWindow(pageWithImages.ToArray());
selectPdfPageWindow.ShowDialog();
pageIndex = pageWithImages[selectPdfPageWindow.pagesComboBox.SelectedIndex];
}
else
{
pageIndex = pageWithImages[0];
}
return(GetPdfPageImage(viewer, pageIndex));
}
finally
{
viewer.Dispose();
}
}
/// <summary>
/// Returns a page images as single image.
/// </summary>
private static BitmapSource GetPdfPageImage(PdfImageViewer viewer, int pageIndex)
{
string[] imageNames = viewer.GetImageNames(pageIndex);
// collect page images
List <BitmapSource> images = new List <BitmapSource>();
for (int i = 0; i < imageNames.Length; i++)
{
try
{
images.Add(viewer.GetImage(pageIndex, imageNames[i]));
}
catch (Exception e)
{
MessageBox.Show(string.Format("Image '{0}': {1}", imageNames[i], e.Message), "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
if (images.Count == 0)
{
return(null);
}
if (images.Count == 1)
{
return(images[0]);
}
// draw images on page
int padding = 5;
int height = 0;
int width = 0;
int n = images.Count;
for (int i = 0; i < n; i++)
{
BitmapSource current = images[i];
if (width < current.PixelWidth)
{
width = current.PixelWidth;
}
height += current.PixelHeight;
}
width += 3;
height += (n + 1) * padding;
DrawingVisual drawingVisual = new DrawingVisual();
DrawingContext drawingContext = drawingVisual.RenderOpen();
drawingContext.DrawRectangle(Brushes.White, null, new Rect(0, 0, width, height));
height = 0;
for (int i = 0; i < images.Count; i++)
{
BitmapSource bitmap = images[i];
if (bitmap.PixelWidth > width)
{
width = bitmap.PixelWidth;
}
drawingContext.DrawImage(bitmap, new Rect(0, height, bitmap.PixelWidth, bitmap.PixelHeight));
height += bitmap.PixelHeight + padding;
}
drawingContext.Close();
// returns combined images
RenderTargetBitmap bmp = new RenderTargetBitmap(width, height, 96, 96, PixelFormats.Pbgra32);
bmp.Render(drawingVisual);
return(bmp);
}
/// <summary>
/// Returns a page images as single image.
/// </summary>
public static BitmapSource GetPdfPageImage(string filename, int pageIndex)
{
using (PdfImageViewer viewer = new PdfImageViewer(filename))
return(GetPdfPageImage(viewer, pageIndex));
}