/// <summary>
/// Pdf拆分方法
/// </summary>
/// <param name="inputFileName">源文件夹下所有PDF文件</param>
/// <param name="outputPath">拆分之后的pdf保存【路径】(名字为生成)</param>
public bool PdfSplite(string inputFileName, string outputPath)
{
int iindex = inputFileName.LastIndexOf("\\");
string strPdfName = inputFileName.Substring(iindex+1);
try
{
int rotation = 0;
PdfReader pdfReader = new PdfReader(inputFileName);
string fileName = inputFileName.Substring(0, inputFileName.Length - 4);
int totalPages = pdfReader.NumberOfPages;
if ((totalPages<0))
{
MessageBox.Show("此pdf为空！");
PDFSort.ErrorLog.WriteError(inputFileName+"此pdf为空页！");
return false;
}
#region 新抽取的pdf命名带有_页数
//2016-09-27 新抽取的pdf命名去掉了_页数
//else if (totalPages <10&&totalPages>0)
//{
// //小于10页
// File.Copy(inputFileName, string.Format("{0}\\{1}_{2}.pdf", outputPath, Path.GetFileNameWithoutExtension(inputFileName), "0"+totalPages.ToString()), true);
//}
//else if (totalPages <= 12 && totalPages >=10)
//{
// //小于12页
// File.Copy(inputFileName, string.Format("{0}\\{1}_{2}.pdf", outputPath, Path.GetFileNameWithoutExtension(inputFileName), totalPages), true);
//}
#endregion
else
{
//var newPdf = string.Format("{0}\\{1}_12.pdf", outputPath, Path.GetFileNameWithoutExtension(inputFileName));
var newPdf = string.Format("{0}\\{1}.pdf", outputPath, Path.GetFileNameWithoutExtension(inputFileName));
FileStream fs = new FileStream(newPdf, FileMode.Create);
Document newDocument = new Document();
PdfWriter pdfWriter = PdfWriter.GetInstance(newDocument, fs);
pdfWriter.CloseStream = true;
newDocument.Open();
PdfContentByte pdfContentByte = pdfWriter.DirectContent;
for (int i = 0; i < totalPages; i++)
{
if (i < 6 || i >= totalPages - 6)
{
newDocument.SetPageSize(pdfReader.GetPageSizeWithRotation(i + 1));
newDocument.NewPage();
PdfImportedPage importedPage = pdfWriter.GetImportedPage(pdfReader, i + 1);
rotation = pdfReader.GetPageRotation(i + 1);
pdfContentByte.AddTemplate(importedPage, 0, 0);
if (rotation == 90 || rotation == 270)
{
pdfContentByte.AddTemplate(importedPage, 0, -1f, 1f, 0, 0, pdfReader.GetPageSizeWithRotation(i + 1).Height);
}
else
{
pdfContentByte.AddTemplate(importedPage, 1f, 0, 0, 1f, 0, 0);
}
}
}
fs.Flush();
newDocument.Close();
return true;
}
}
catch (Exception ex)
{
ErrorLog.WriteError(ex.ToString());
return false;
}
}