public static byte[] AddPdfAFlag(byte[] fileContents)
{
using (var memoryStream = new MemoryStream())
{
using (var pdfReader = new PdfReader(fileContents))
{
using (var pdfStamper = new PdfStamper(pdfReader, memoryStream, '\0', true))
{
using (var pdfaMemoryStream = new MemoryStream())
{
var xmpWriter = new XmpWriter(pdfaMemoryStream, pdfStamper.MoreInfo);
xmpWriter.SetProperty(XmpConst.NS_PDFA_ID, PdfAProperties.PART, "3");
xmpWriter.SetProperty(XmpConst.NS_PDFA_ID, PdfAProperties.CONFORMANCE, "A");
xmpWriter.Close();
pdfStamper.XmpMetadata = pdfaMemoryStream.ToArray();
}
}
}
return(memoryStream.ToArray());
}
}
public static void AddPdfAFlag(string filePath)
{
var newFilePath = filePath.CombineFilePathWithGuid();
using (var fileStream = new FileStream(newFilePath, FileMode.Create))
{
using (var pdfReader = new PdfReader(filePath))
{
using (var pdfStamper = new PdfStamper(pdfReader, fileStream, '\0', true))
{
using (var pdfaMemoryStream = new MemoryStream())
{
var xmpWriter = new XmpWriter(pdfaMemoryStream, pdfStamper.MoreInfo);
xmpWriter.SetProperty(XmpConst.NS_PDFA_ID, PdfAProperties.PART, "3");
xmpWriter.SetProperty(XmpConst.NS_PDFA_ID, PdfAProperties.CONFORMANCE, "A");
xmpWriter.Close();
pdfStamper.XmpMetadata = pdfaMemoryStream.ToArray();
}
}
}
}
File.Copy(newFilePath, filePath, true);
}