Concatenation fails when merging PDFs generated by Aspose.PDF .NET (11.5 for .net3.5). I'm able to concatenate non-Aspose created PDFs without issue.
PDFIsValid = True
PDFIsValid = True
System.NullReferenceException: Object reference not set to an instance of an object.
at Aspose.Pdf.Facades.PdfFileEditor.☻(Exception ☻)
at Aspose.Pdf.Facades.PdfFileEditor.Concatenate(String[] inputFiles, String outputFile)
at AsposeConcatenate.Program.Main(String[] args) in c:\Development\TrustOnline\TrustOnline\Utility\AsposeConcatenate\
AsposeConcatenate\Program.cs:line 59
No corrupted documents.
/////////////////////
using System;
using System.IO;
using Aspose.Pdf.Facades;
namespace AsposeConcatenate
{
class Program
{
static void Main(string[] args)
{
if (File.Exists("output.pdf")) File.Delete("output.pdf");
if (File.Exists("template.pdf")) File.Delete("template.pdf");
if (File.Exists("template2.pdf")) File.Delete("template2.pdf");
{
var license = new Aspose.Pdf.License();
license.SetLicense("Aspose.Total.lic");
}
{
var license = new Aspose.Words.License();
license.SetLicense("Aspose.Total.lic");
}
using (var memoryStream = new MemoryStream())
using (var writer = new StreamWriter(memoryStream))
{
writer.Write("some text");
writer.Flush();
var newDoc = new Aspose.Words.Document(memoryStream);
try
{
newDoc.Save("template.pdf", Aspose.Words.SaveFormat.Pdf);
newDoc.Save("template2.pdf", Aspose.Words.SaveFormat.Pdf);
}
catch (Exception e)
{
Console.WriteLine(e.ToString());
return;
}
}
string[] filesArray = new string[2];
filesArray[0] = "template.pdf";
filesArray[1] = "template2.pdf";
// Confirm files are valid
foreach (string file in filesArray)
{
Console.WriteLine("PDFIsValid = {0}", PdfIsValid(file));
}
PdfFileEditor pdfEditor = new PdfFileEditor();
pdfEditor.CorruptedFileAction = PdfFileEditor.ConcatenateCorruptedFileAction.StopWithError;
pdfEditor.CloseConcatenatedStreams = true;
pdfEditor.AllowConcatenateExceptions = true;
try
{
bool result = pdfEditor.Concatenate(filesArray, "output.pdf");
Console.WriteLine("Concatenate Result = {0}", result);
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
if (pdfEditor.CorruptedItems.Length > 0)
{
Console.WriteLine("Corrupted documents:");
foreach (PdfFileEditor.CorruptedItem item in pdfEditor.CorruptedItems)
{
Console.WriteLine(item.Index + " reason " + item.Exception.Message);
}
}
else
{
Console.WriteLine("No corrupted documents.");
}
Console.ReadLine();
}
public static bool PdfIsValid(string fileName)
{
try
{
var doc = new Aspose.Pdf.Document(fileName);
}
catch (Exception e)
{
Console.WriteLine(e);
return false;
}
return true;
}
}
}