/// <summary>
/// 将PDF文档转换为图片的方法
/// </summary>
/// <param name="pdfInputPath">PDF文件路径</param>
/// <param name="imageOutputPath">图片输出路径</param>
/// <param name="imageName">生成图片的名字</param>
/// <param name="startPageNum">从PDF文档的第几页开始转换</param>
/// <param name="endPageNum">从PDF文档的第几页开始停止转换</param>
/// <param name="imageFormat">设置所需图片格式</param>
/// <param name="definition">设置图片的清晰度，数字越大越清晰</param>
public static void ConvertPDF2Image(string pdfInputPath, string imageOutputPath,
string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, Definition definition)
{
FileStream fs = new FileStream(pdfInputPath, FileMode.Open);
TallComponents.PDF.Rasterizer.Document doc = new TallComponents.PDF.Rasterizer.Document(fs);
if (!Directory.Exists(imageOutputPath))
{
Directory.CreateDirectory(imageOutputPath);
}
// validate pageNum
if (startPageNum <= 0)
{
startPageNum = 1;
}
if (endPageNum > doc.Pages.Count)
{
endPageNum = doc.Pages.Count;
}
if (startPageNum > endPageNum)
{
int tempPageNum = startPageNum;
startPageNum = endPageNum;
endPageNum = startPageNum;
}
// start to convert each page
for (int i = startPageNum; i <= endPageNum; i++)
{
using (FileStream fs1 = File.Create(imageOutputPath + @"~temp" + i + ".tmp"))
{
TallComponents.PDF.Rasterizer.ConvertToTiffOptions option = new TallComponents.PDF.Rasterizer.ConvertToTiffOptions();
doc.Pages[i].ConvertToTiff(fs1, option);
System.Drawing.Image img = System.Drawing.Image.FromStream(fs1);
img.Save(imageOutputPath + imageName + i.ToString() + "." + imageFormat.ToString(), imageFormat);
}
File.Delete(imageOutputPath + @"~temp" + i + ".tmp");
}
fs.Dispose();
}
/// <summary>
/// 将PDF文档转换为图片的方法
/// </summary>
/// <param name="pdfInputPath">PDF文件路径</param>
/// <param name="imageOutputPath">图片输出路径</param>
/// <param name="imageName">生成图片的名字</param>
/// <param name="startPageNum">从PDF文档的第几页开始转换</param>
/// <param name="endPageNum">从PDF文档的第几页开始停止转换</param>
/// <param name="imageFormat">设置所需图片格式</param>
/// <param name="definition">设置图片的清晰度，数字越大越清晰</param>
public static void ConvertPDF2Image(string pdfInputPath, string imageOutputPath,
string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, Definition definition)
{
FileStream fs = new FileStream(pdfInputPath, FileMode.Open);
TallComponents.PDF.Rasterizer.Document doc = new TallComponents.PDF.Rasterizer.Document(fs);
if (!Directory.Exists(imageOutputPath))
{
Directory.CreateDirectory(imageOutputPath);
}
// validate pageNum
if (startPageNum <= 0)
{
startPageNum = 1;
}
if (endPageNum > doc.Pages.Count)
{
endPageNum = doc.Pages.Count;
}
if (startPageNum > endPageNum)
{
int tempPageNum = startPageNum;
startPageNum = endPageNum;
endPageNum = startPageNum;
}
// start to convert each page
for (int i = startPageNum; i <= endPageNum; i++)
{
using (FileStream fs1 = File.Create(imageOutputPath + @"~temp" + i + ".tmp"))
{
TallComponents.PDF.Rasterizer.ConvertToTiffOptions option = new TallComponents.PDF.Rasterizer.ConvertToTiffOptions();
doc.Pages[i].ConvertToTiff(fs1, option);
System.Drawing.Image img = System.Drawing.Image.FromStream(fs1);
img.Save(imageOutputPath + imageName + i.ToString() + "." + imageFormat.ToString(), imageFormat);
}
File.Delete(imageOutputPath + @"~temp" + i + ".tmp");
}
fs.Dispose();
}
void drawPage(int index)
{
using (FileStream file = new FileStream(path, FileMode.Open, FileAccess.Read))
{
pdf.Rasterizer.Document document = new pdf.Rasterizer.Document(file);
pdf.Rasterizer.Page page = document.Pages[index];
pdf.Rasterizer.Configuration.RenderSettings renderSettings = new pdf.Rasterizer.Configuration.RenderSettings();
pdf.Rasterizer.Diagnostics.Summary summary = new pdf.Rasterizer.Diagnostics.Summary();
pdf.Rasterizer.ConvertToWpfOptions convertOptions = new pdf.Rasterizer.ConvertToWpfOptions();
FixedDocument fixedDocument = document.ConvertToWpf(renderSettings, convertOptions, index, index, summary);
documentViewer.Document = fixedDocument;
FixedPage fixedPage = fixedDocument.Pages[0].Child;
// add a canvas and change its coordinate system to that of PDF
overlay = new Canvas();
overlay.Width = fixedPage.Width;
overlay.Height = fixedPage.Height;
TransformGroup group = new TransformGroup();
group.Children.Insert(0, new TranslateTransform(0, fixedPage.Height));
group.Children.Insert(0, new ScaleTransform(fixedPage.Width / page.Width, -fixedPage.Height / page.Height));
switch (page.Orientation)
{
case pdf.Rasterizer.Orientation.Rotate90:
group.Children.Insert(0, new RotateTransform(90));
group.Children.Insert(0, new TranslateTransform(0, -page.MediaBox.Height));
break;
case pdf.Rasterizer.Orientation.Rotate180:
group.Children.Insert(0, new RotateTransform(180));
group.Children.Insert(0, new TranslateTransform(-page.MediaBox.Width, -page.MediaBox.Height));
break;
case pdf.Rasterizer.Orientation.Rotate270:
group.Children.Insert(0, new RotateTransform(270));
group.Children.Insert(0, new TranslateTransform(-page.MediaBox.Width, 0));
break;
default:
break;
}
overlay.RenderTransform = group;
fixedPage.Children.Add(overlay);
// now draw on the canvas in PDF coordinate space
System.Windows.Shapes.Line line1 = new System.Windows.Shapes.Line();
line1.Stroke = new SolidColorBrush(Colors.Red);
line1.StrokeThickness = 3;
line1.X1 = line1.Y1 = 0;
line1.X2 = page.MediaBox.Width / 2;
line1.Y2 = page.MediaBox.Height / 2;
overlay.Children.Add(line1);
System.Windows.Shapes.Line line2 = new System.Windows.Shapes.Line();
line2.Stroke = new SolidColorBrush(Colors.Green);
line2.StrokeThickness = 3;
line2.X1 = 0;
line2.Y1 = page.MediaBox.Height;
line2.X2 = page.MediaBox.Width;
line2.Y2 = 0;
overlay.Children.Add(line2);
System.Windows.Shapes.Ellipse ellipse = new System.Windows.Shapes.Ellipse();
ellipse.Width = ellipse.Height = page.MediaBox.Height;
ellipse.Stroke = new SolidColorBrush(Colors.Blue);
ellipse.StrokeThickness = 3;
overlay.Children.Add(ellipse);
}
}
