Spire.XLS 10.11.2已发布。 该版本新增了添加和删除数字签名到excel功能、修订功能以及将Excel转为PDF时支持数学公式等。新功能详情如下。

新功能:

• 支持添加、删除数字签名

Workbook workbook = new Workbook();
workbook.LoadFromFile(inputFile);
//添加签名
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);
//删除签名
workbook.RemoveAllDigitalSignatures();
workbook.SaveToFile(outputFile, FileFormat);

• 支持Excel文档修订功能

Workbook workbook = new Workbook();
workbook.LoadFromFile(inputFile);
workbook.AcceptAllTrackedChanges();//修订全部接受
workbook.SaveToFile(outputFile, FileFormat.Version2013);

Workbook workbook = new Workbook();
workbook.LoadFromFile(inputFile);
workbook.RejectAllTrackedChanges(); //修订全部拒绝
workbook.SaveToFile(outputFile, FileFormat.Version2013);

• 转换Excel到PDF时，支持数学公式

https://www.e-iceblue.cn/Downloads/Spire-XLS-NET.html