public static bool MergePdfs(string folderInput, string mergePdfName, ref List <ColumbusIndex> documentsToMerge)
{
using (FileStream stream = new FileStream(mergePdfName, FileMode.Create))
{
var totalDocs = 0;
PdfReader reader = null;
Document document = new Document();
PdfSmartCopy pdf = new PdfSmartCopy(document, stream);
List <ColumbusIndex> tempList = new List <ColumbusIndex>();
try
{
document.Open();
foreach (var doc in documentsToMerge)
{
tempList.Add(doc);
if (totalDocs > 0)
{
if (documentsToMerge[totalDocs - 1].PdfTempData != null)
{
documentsToMerge[totalDocs - 1].PdfTempData = null; //Release from memory
}
}
totalDocs++;
try
{
if (doc.PdfTempData == null)
{
doc.PdfTempData = File.ReadAllBytes(Path.Combine(folderInput, doc.FileName));
}
reader = new PdfReader(doc.PdfTempData);
doc.Pages = reader.NumberOfPages;
if (doc.Pages == 0)
{
throw new Exception("Do not allow documents with zero pages");
}
for (int i = 1; i <= doc.Pages; i++)
{
//import the page from source pdf
var copiedPage = pdf.GetImportedPage(reader, i);
// add the page to the new document
if (pdf != null)
{
pdf.AddPage(copiedPage);
}
}
if (pdf != null && reader != null)
{
pdf.FreeReader(reader);
pdf.Flush();
}
if (reader != null)
{
reader.Close();
}
long fileSize = new FileInfo(mergePdfName).Length;
long columbusPDFMaxSize = Convert.ToInt64(ConfigurationManager.AppSettings["ColumbusPDFMaxSize"]);
if (fileSize > columbusPDFMaxSize) //If file size is bigger than 200mb, start a new file
{
GenerateControlFile(mergePdfName, tempList);
documentsToMerge = documentsToMerge.Except(tempList).ToList();
return(true);
}
}
catch (Exception ex1)
{
doc.FileMissing = true;
throw new ProcessingException("COMBINE PDF: [" + Path.Combine(folderInput, doc.FileName) + "] " + ex1.Message + " : " + ex1.StackTrace);
}
}
//Generate control file for last merged PDF
GenerateControlFile(mergePdfName, tempList);
documentsToMerge = documentsToMerge.Except(tempList).ToList();
return(true);
}
catch (Exception ex)
{
Log.Error(string.Format("Failed to merge files in {0} to {1}. ex: {2}", folderInput, mergePdfName, ex));
if (reader != null)
{
reader.Close();
}
return(false);
}
finally
{
if (document != null)
{
document.Close();
}
}
}
}
