Is it possible to put a digital signature on a excel file?

[sayan1995]

Hi,
Is it anyhow possible to add multiple digital signature to an excel file or word file using Spire.XLS or Spire.Doc in a .net project?
I already have Spire.PDF in my .net application and it's working just fine and was wondering if Spire.DOC and Spire.XLS can also be in use to put digital signature on them.
Thanks in advance.

[rachel.lei]

Hello,

Thanks for your inquiry.
Our Spire.Doc supports adding digital signature to Word documents, please refer to the tutorial below.
Add Digital Signature to Word in C#

But our Spire.XLS doesn't support this feature yet. We have added it to our further upgrade list with the ticket SPIREXLS-1863. If it can be achieved in the future, we will let you know.

Sincerely,
Rachel
E-iceblue support team

[rachel.lei]

Hello,

Thanks for your patience.
Glad to inform you that we just released Spire.XLS Pack(Hotfix) Version:10.11.2 that supports adding digital signature. Welcome to download it from the following links.
Website link: https://www.e-iceblue.com/Download/down ... t-now.html
NuGet link: https://www.nuget.org/packages/Spire.XLS/10.11.2

Code example:

Code: Select all

Workbook workbook = new Workbook();
workbook.LoadFromFile(inputFile);
//Add digital signature
X509Certificate2 cert = new X509Certificate2(inputFile_pfx, "e-iceblue");
DateTime certtime = new DateTime(2020, 7, 1, 7, 10, 36);
IDigitalSignatures dsc = workbook.AddDigitalSignature(cert, "e-iceblue", certtime);
//delete digital signature
workbook.RemoveAllDigitalSignatures();
workbook.SaveToFile(outputFile, FileFormat);

Sincerely,
Rachel
E-iceblue support team

[rachel.lei]

Hello,

Greetings from E-iceblue!
Have you tested the new feature? Any feedback would be greatly appreciated!

Sincerely,
Rachel
E-iceblue support team