/// <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();
}
