DigitalSignatureCollection
Contents
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DigitalSignatureCollection class
Provides a collection of digital signatures attached to a document.
public class DigitalSignatureCollection : IEnumerable
Constructors
Name | Description |
---|---|
DigitalSignatureCollection() | The constructor of DigitalSignatureCollection. |
Methods
Name | Description |
---|---|
Add(DigitalSignature) | Add one signature to DigitalSignatureCollection. |
GetEnumerator() | Get the enumerator for DigitalSignatureCollection, this enumerator allows iteration over the collection |
Examples
The following example shows how to create digital signature
[C#]
internal void ValidateSignature()
{
Workbook wb = new Workbook(@"newfile.xlsx");
//wb.IsDigitallySigned is true when the workbook is signed already.
System.Console.WriteLine(wb.IsDigitallySigned);
//get digitalSignature collection from workbook
DigitalSignatureCollection dsc = wb.GetDigitalSignature();
foreach (DigitalSignature ds in dsc)
{
System.Console.WriteLine(ds.Comments);
System.Console.WriteLine(ds.SignTime);
System.Console.WriteLine(ds.IsValid);
}
}
internal void SignSignature()
{
//dsc is signature collection contains one or more signature needed to sign
DigitalSignatureCollection dsc = new DigitalSignatureCollection();
//cert must contain private key, it can be contructed from cert file or windows certificate collection.
//123456 is password of cert
X509Certificate2 cert = new X509Certificate2("mykey2.pfx", "123456");
DigitalSignature ds = new DigitalSignature(cert, "test for sign", DateTime.Now);
dsc.Add(ds);
Workbook wb = new Workbook();
//wb.SetDigitalSignature sign all signatures in dsc
wb.SetDigitalSignature(dsc);
wb.Save(@"newfile.xlsx");
}
[Visual Basic]
Sub ValidateSignature()
Dim workbook As Workbook = New Workbook("newfile.xlsx")
'Workbook.IsDigitallySigned is true when the workbook is signed already.
System.Console.WriteLine(workbook.IsDigitallySigned)
'get digitalSignature collection from workbook
Dim dsc As DigitalSignatureCollection = workbook.GetDigitalSignature()
Dim ds As DigitalSignature
For Each ds In dsc
System.Console.WriteLine(ds.Comments)
System.Console.WriteLine(ds.SignTime)
System.Console.WriteLine(ds.IsValid)
Next
End Sub
Sub SignSignature()
'dsc is signature collection contains one or more signature needed to sign
Dim dsc As DigitalSignatureCollection = New DigitalSignatureCollection()
'cert must contain private key, it can be contructed from cert file or windows certificate collection.
Dim cert As X509Certificate2 = New X509Certificate2("mykey2.pfx", "123456")
'create a signature with certificate, sign purpose and sign time
Dim ds As DigitalSignature = New DigitalSignature(cert, "test for sign", DateTime.Now)
dsc.Add(ds)
Dim workbook As Workbook = New Workbook()
'workbook.SetDigitalSignature sign all signatures in dsc
workbook.SetDigitalSignature(dsc)
workbook.Save("newfile.xlsx")
End Sub
See Also
- namespace Aspose.Cells.DigitalSignatures
- assembly Aspose.Cells