// -------------------- IterateSignatureDefinitions --------------------
/// <summary>
/// Interates through the SignatureDefinition contained in a given
/// XPS document displaying and updating the signature properties
/// through a user dialog.</summary>
/// <param name="signatureDialog">
/// The user dialog to use in displaying and
/// updating the signature information.</param>
/// <param name="xpsDocument">
/// The XPS document containing the signature information.</param>
public void IterateSignatureDefinitions(
SignatureDialog signatureDialog, XpsDocument xpsDocument)
{
IXpsFixedDocumentSequenceReader docSeq =
xpsDocument.FixedDocumentSequenceReader;
// For every FixedDocument in the XPS document.
foreach (IXpsFixedDocumentReader doc in docSeq.FixedDocuments)
{
// For every SignatureDefinition in each FixedDocument.
foreach (XpsSignatureDefinition signature in
doc.SignatureDefinitions)
{
SignatureDisplayItem item =
signatureDialog.AddSignatureItem(signature);
// Signatures are bound to signature definitions by GUID.
// If the SignatureDefintion SpotId is the same as the
// SignatureId, the signature is signing that definition.
// For every signature in the XPS document.
foreach (XpsDigitalSignature sig in xpsDocument.Signatures)
{
if (sig.Id != null && sig.Id == signature.SpotId)
{
X509Certificate2 cert =
sig.SignerCertificate as X509Certificate2;
item.Signer =
cert.GetNameInfo(X509NameType.SimpleName, false);
item.IsSigned = true;
}
} // end:foreach (XpsDigitalSignature
} // end:foreach (XpsSignatureDefinition
} // end:foreach (IXpsFixedDocumentReader
} // end:IterateSignatureDefinitions()
}// end:OutlineCommandHandler()
// ---------------------- SignatureCommandHandler ---------------------
/// <summary>
/// Displays a dialog showing the current digital signatures and
/// signature definitions. A button on the dialog allows additional
/// signatures to be added.</summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void SignatureCommandHandler(
object sender, ExecutedRoutedEventArgs e)
{
if (_fileName != null)
{
SignatureDialog signatureDialog =
new SignatureDialog(_xpsDocument);
signatureDialog.ShowDialog();
// Close to flush the new signature definition, then reopen.
_xpsDocument.Close();
_xpsDocument = new XpsDocument(_fileName, FileAccess.ReadWrite);
}
}// end:SignatureCommandHandler()
} // end:IterateSignatureDefinitions()
// ------------------------- IterateSignatures ------------------------
/// <summary>
/// Interates through signatures that are not associated with
/// a SignatureDefinition.</summary>
/// <param name="signatureDialog">
/// The user dialog to use in displaying and
/// updating the signature information.</param>
/// <param name="xpsDocument">
/// The XPS document containing the signature information.</param>
public void IterateSignatures(
SignatureDialog signatureDialog, XpsDocument xpsDocument)
{
bool found = false;
IXpsFixedDocumentSequenceReader docSeq =
xpsDocument.FixedDocumentSequenceReader;
// For every signature in the XPS document.
foreach (XpsDigitalSignature sig in xpsDocument.Signatures)
{
found = false;
// For every FixedDocument in the XPS document.
foreach (IXpsFixedDocumentReader doc in docSeq.FixedDocuments)
{
// For every SignatureDefinition in each FixedDocument.
foreach (XpsSignatureDefinition signature in
doc.SignatureDefinitions)
{
if (sig.Id != null && sig.Id == signature.SpotId)
{
found = true;
break;
}
}//end:foreach (XpsSignatureDefinition
if (found)
{
break;
}
}// end:foreach (IXpsFixedDocument
if (!found)
{
SignatureDisplayItem item =
signatureDialog.AddSignatureItem(null);
X509Certificate2 cert =
sig.SignerCertificate as X509Certificate2;
item.Signer =
cert.GetNameInfo(X509NameType.SimpleName, false);
item.IsSigned = true;
}
} // end:foreach (XpsDigitalSignature
} // end:IterateSignatures()