Excel API Library for .NET - Sample Browser | Document Solutions | Add non visible signature

Ensure the integrity of the workbook by adding an invisible digital signature with ISignatureSet.AddNonVisibleSignature method. //create a new workbook var workbook = new GrapeCity.Documents.Excel.Workbook(); ISignature signature = workbook.Signatures.AddNonVisibleSignature(); // TODO: Use your information var details = new SignatureDetails { Address1 = "<your address>", Address2 = "<address 2>", SignatureComments = "Final", City = "<your city>", StateOrProvince = "<your state or province>", PostalCode = "<your postal code>", CountryName = "<your country or region>", ClaimedRole = "<your role>", CommitmentTypeDescription = "Approved", CommitmentTypeQualifier = "Final" }; // TODO: Use your certificate var cert = new X509Certificate2("<your certificate file>", "<your password>"); // TODO: Use your name or signature image signature.Sign(cert, details); // Commit signature workbook.Save("SignWorkbook.xlsx"); ' Create a new Workbook Dim workbook As New Workbook Dim signature As ISignature = workbook.Signatures.AddNonVisibleSignature() ' TODO: Use your information Dim details As New SignatureDetails With { .Address1 = "<your address>", .Address2 = "<address 2>", .SignatureComments = "Final", .City = "<your city>", .StateOrProvince = "<your state or province>", .PostalCode = "<your postal code>", .CountryName = "<your country or region>", .ClaimedRole = "<your role>", .CommitmentTypeDescription = "Approved", .CommitmentTypeQualifier = "Final" } ' TODO: Use your certificate Dim cert As New X509Certificate2("<your certificate file>", "<your password>") ' TODO: Use your name or signature image signature.Sign(cert, details) ' Commit signature workbook.Save("SignWorkbook.xlsx")