I am trying to combine multiple PDFs into a single PDF. The PDFs come from SSRS, from some LocalReports that I processed. I am using PDFSharp, because it is already used through out the project. However, the outputDocument.addPage(page) methods throws an InvalidOperationException("Cannot change document.") exception. I have tried many different way of doing this, but I can't get it to work...
Here my method, where all the inputs have already been checked:
Code:
private static void saveFile(string fileName, params byte[][] bytes)
{
try
{
PdfDocument outputDocument = new PdfDocument();
for (int i = 0; i < bytes.Length; i++)
{
using (MemoryStream stream = new MemoryStream(bytes[i]))
{
PdfDocument inputDocument = PdfReader.Open(stream, PdfDocumentOpenMode.Import);
foreach (PdfPage page in inputDocument.Pages)
{
outputDocument.AddPage(page); //throws the exception !!!
}
}
}
outputDocument.Save(fileName);
}
catch (Exception ex)
{
throw new Exception("Erreur lors de l'enregistrement du fichier", ex);
}
}
From the examples I saw on the web, this seems to be the right way of doing this... I am opened to other suggestions for merging my PDFs, but I would rather not use another 3rd party lib, like ITextSharp, because PDFSharp is already used in the project.
If it matters, I am using VS2010 Pro on a Win7 machine.
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