PDF Portfolio

[Tjunas]

Hi Spire Support,

Can I use SpirePDF to create a PDF Portfolio from multiple PDF files?

I need to combine separate digitally signed PDF's in one PDF Portfolio without invalidating my signatures.

Any assistance would be greatly appreciated.

Regards
Tjunas

[amy.zhao]

Hi Tjunas,

Thanks for your inquiry.
Sorry that at present our Spire.PDF doesn't support to create PDF Portfolio, but we have added it as new feature into our schedule. We will inform you when it is supported.

Share sample code for verifying the validity of digital signature:

Code: Select all

using (var doc = new PdfDocument("..\\..\\one_valid_signature.pdf"))
            {
                var form = (PdfFormWidget)doc.Form;
                for (int i = 0; i < form.FieldsWidget.Count; ++i)
                {
                    var field = form.FieldsWidget[i] as PdfSignatureFieldWidget;
                    if (field != null && field.Signature != null)
                    {
                        PdfSignature signature = field.Signature;
                        //validity of the digital signature
                        bool bSignature = signature.VerifySignature();
                    }
                }
            }

Best Regards,
Amy
E-iceblue support team

[amy.zhao]

Hi Tjunas,

Sorry for long silence.
I am glad to inform you that our Spire products support creating a PDF Portfolio now. Please download and test Spire.Office Platinum Version:5.5.1.
Nuget link: https://www.nuget.org/packages/Spire.Office/5.5.1
Website link: https://www.e-iceblue.com/Download/down ... t-now.html

Code: Select all

String[] files = new String[]{ "File1.pdf", "File2.pdf" };
using (PdfDocument doc = new PdfDocument())
{
for (int i = 0; i < files.Length; i++)
{ doc.Collection.AddFile(files[i]); }

doc.SaveToFile("output.pdf", FileFormat.PDF);
doc.Dispose();
}

//Create sub folder and add file into it
string[] files = Directory.GetFiles(@"input/");
string inputFile_1 = "input.pdf";
using (PdfDocument doc = new PdfDocument(inputFile_1))
{
for (int i = 0; i < files.Length; i++)
{ doc.Collection.Folders.AddFile(files[i]); PdfFolder folder = doc.Collection.Folders.CreateSubfolder("SubFolder" + i); folder.AddFile(files[i]); }

doc.SaveToFile("output.pdf", FileFormat.PDF);
doc.Dispose();
}

Sincerely,
Amy
E-iceblue support team