public static void ConvertPDF2Image(string pdfInputPath, string imageOutputPath, string imageName, int startPageNum, int endPageNum, ImageFormat imageFormat, Definition definition)
{
PDFWrapper pdfWrapper = new PDFWrapper();
pdfWrapper.LoadPDF(pdfInputPath);
if (!System.IO.Directory.Exists(imageOutputPath))
{
Directory.CreateDirectory(imageOutputPath);
}
// validate pageNum
if (startPageNum <= 0)
{
startPageNum = 1;
}
if (endPageNum > pdfWrapper.PageCount)
{
endPageNum = pdfWrapper.PageCount;
}
if (startPageNum > endPageNum)
{
int tempPageNum = startPageNum;
startPageNum = endPageNum;
endPageNum = startPageNum;
}
// start to convert each page
for (int i = startPageNum; i <= endPageNum; i++)
{
pdfWrapper.ExportJpg(imageOutputPath + imageName, i, i, 300, 90);//这里可以设置输出图片的页数、大小和图片质量从默认的150--》300
while (pdfWrapper.IsJpgBusy == true)
{
System.Threading.Thread.Sleep(500);
}
}
pdfWrapper.Dispose();
}
/// <summary>
/// Set image for PictureBox
/// </summary>
private void SetPictureBoxImage()
{
try
{
// 一時フォルダ存在チェック
if (!System.IO.Directory.Exists(Path.GetTempPath() + @"PDFViewer\"))
{
System.IO.Directory.CreateDirectory(Path.GetTempPath() + @"PDFViewer\");
}
string jpgFileName = Path.GetTempPath() + @"PDFViewer\" + "temp" + DateTime.Now.Millisecond;
//Create current page
pdfDoc.ExportJpg(jpgFileName, currentPage, currentPage, imageDPI, imageQuality);
if (pdfDoc.IsJpgBusy)
{
System.Threading.Thread.Sleep(50);
}
do
{
System.Threading.Thread.Sleep(100);
}while (!File.Exists(jpgFileName));
System.Threading.Thread.Sleep(100);
Stream stream = new FileStream(jpgFileName, FileMode.Open, FileAccess.Read, FileShare.Read);
img = new Bitmap(stream);
img = ResizeImage((Bitmap)img, img.Width, img.Height);
int w = Convert.ToInt32(img.Width * zoomRate[currentZoom]);
int h = Convert.ToInt32(img.Height * zoomRate[currentZoom]);
Image imgNew = ResizeImage((Bitmap)img, w, h);
imgNew = SetCurrentRatationImage(imgNew);
pbViewer.Image = imgNew;
stream.Close();
stream.Dispose();
System.Threading.Thread.Sleep(100);
File.Delete(jpgFileName);
FitPnlViewerSize(imgNew);
SetPnlViewerLocation();
}
catch (Exception ex)
{
throw;
//MessageBox.Show(ex.ToString());
}
}
/// <summary>
/// pdf分页转图片
/// </summary>
/// <param name="attachmentId">附件id</param>
/// <param name="sourcePath">文件原始路劲</param>
/// <param name="fileInputPath">文件路劲（临时文件路劲）</param>
/// <param name="fileSavePath">文件要保存的路劲</param>
/// <param name="imageFormat">图片格式</param>
/// <param name="DPI">图片分辨率（数值越大质量越高）</param>
/// <param name="definition">清晰度（数值越大质量越高）</param>
/// <returns></returns>
public bool PdfToImg(int attachmentId, string sourcePath, string fileInputPath, string fileSavePath, ImageFormat imageFormat, int DPI, int definition)
{
try
{
List <int> list = new List <int>();
PDFWrapper wrapper = new PDFWrapper();
wrapper.LoadPDF(fileInputPath);
if (!Directory.Exists(fileSavePath))
{
Directory.CreateDirectory(fileSavePath);
}
var pageCount = wrapper.PageCount;
StringBuilder sb = new StringBuilder();
if (pageCount > 0)
{
sb.Append(string.Format("delete from PreviewFile where AttachmentId={0};", attachmentId));
for (int num = 1; num <= pageCount; num++)
{
string filename = fileSavePath + "\\" + num.ToString() + "." + imageFormat.ToString();
if (File.Exists(filename))
{
File.Delete(filename);
}
wrapper.ExportJpg(filename, num, num, (double)DPI, definition);
sb.Append(string.Format("insert into PreviewFile(AttachmentId,SavePath,CreateTime)values({0},'{1}','{2}');", attachmentId, fileSavePath.Replace(sourcePath, "").Replace("\\", "/"), DateTime.Now));
Thread.Sleep(1000);
}
wrapper.Dispose();
var result = SqlHelper.ExecteNonQueryText(sb.ToString(), null);
return(result > 0);
}
else
{
return(true);
}
}
catch (Exception exception)
{
throw exception;
}
}
/// <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)
{
PDFWrapper pdfWrapper = new PDFWrapper();
pdfWrapper.LoadPDF(pdfInputPath);
if (!System.IO.Directory.Exists(imageOutputPath))
{
Directory.CreateDirectory(imageOutputPath);
}
// validate pageNum
if (startPageNum <= 0)
{
startPageNum = 1;
}
if (endPageNum > pdfWrapper.PageCount)
{
endPageNum = pdfWrapper.PageCount;
}
if (startPageNum > endPageNum)
{
int tempPageNum = startPageNum;
startPageNum = endPageNum;
endPageNum = startPageNum;
}
// start to convert each page
for (int i = startPageNum; i <= endPageNum; i++)
{
pdfWrapper.ExportJpg(imageOutputPath + imageName + i.ToString() + ".jpg", i, i, 150, 90);//这里可以设置输出图片的页数、大小和图片质量
if (pdfWrapper.IsJpgBusy) { System.Threading.Thread.Sleep(50); }
}
pdfWrapper.Dispose();
}
/// <summary>
/// 调用PDFLibNet生成图片(如果pdf文件有特殊字体，无法转化)
/// </summary>
private static void GetImgFromPDFLibNet()
{
string pdfInputPath = AppDomain.CurrentDomain.BaseDirectory + "test.pdf";
string imageOutputPath = AppDomain.CurrentDomain.BaseDirectory + @"\Pdf2Img\";
ImageFormat imageFormat = ImageFormat.Png;
int DPI = 200; int definition = 30;
try
{
List <int> list = new List <int>();
PDFWrapper wrapper = new PDFWrapper();
wrapper.LoadPDF(pdfInputPath);
if (!Directory.Exists(imageOutputPath))
{
Directory.CreateDirectory(imageOutputPath);
}
if (list.Count == 0)
{
for (int i = 1; i <= wrapper.PageCount; i++)
{
list.Add(i);
}
}
foreach (int num in list)
{
string filename = imageOutputPath + num.ToString() + "." + imageFormat.ToString();
wrapper.ExportJpg(filename, num, num, (double)DPI, definition);
Thread.Sleep(1000);
Console.WriteLine("生成图片" + filename);
}
wrapper.Dispose();
}
catch (Exception exception)
{
Console.WriteLine("异常" + exception.ToString());
}
}
