I’m having a problem with digitally signing an Excel file.
I want to exporting data from a grid to Excel. If I include a column containing rich text and a link, the signature becomes invalid upon opening the file. When the column is not included, the signature stays valid.
The steps I’m taking to generate a file are:
- create a new workbook
- fill it with data from my grid
- build a DigitalSignatureCollection
- Add the collection with workbook.AddDigitalSignature(digitalSignatureCollection);
- save the workbook with workbook with workbook.Save(fileName);
One thing I noticed:
When I generate the file via aspose.cells, under Additional Information Signaturedetails I see Office- and Excel-Version to be 12.0. When I add a signature directly in Excel, Office- and Excel-Version are 16.0.