/// <summary>
/// See IDigitalSignatureProvider
/// </summary>
void IDigitalSignatureProvider.UnsignDocument(Guid id)
{
AssertIsSignable();
foreach (DigitalSignature signature in DigitalSignatureList)
{
if (signature.GuidID == id)
{
// Remove the associated XpsDigitalSignature from the
// document
if (signature.XpsDigitalSignature != null)
{
XpsDocument.RemoveSignature(signature.XpsDigitalSignature);
signature.XpsDigitalSignature = null;
}
// Check if the document contains a signature definition
// corresponding to this signature
bool matchesDefinition = (FindSignatureDefinition(id) != null);
// If the signature matches a signature definition in the
// document, mark the signature as NotSigned (i.e. an
// unsigned request) but leave it in the list
if (matchesDefinition)
{
signature.SignatureState = SignatureStatus.NotSigned;
}
else
{
// Remove the signature from the list
DigitalSignatureList.Remove(signature);
}
// It is safe to remove an element from the list that we're
// currently enumerating because we stop enumerating as soon
// as we find the element we're looking for.
break;
}
}
}