/// <summary>
/// Authenticates the specified document.
/// </summary>
/// <param name="decoder">The decoder.</param>
public static bool Authenticate(DecoderBase decoder)
{
// if authentication is required
if (decoder.IsAuthenticationRequired)
{
// get the document filename
string filename = null;
if (decoder.SourceStream != null && decoder.SourceStream is FileStream)
{
filename = ((FileStream)decoder.SourceStream).Name;
}
while (true)
{
// create the document password dialog
using (DocumentPasswordForm enterPasswordDialog = new DocumentPasswordForm())
{
enterPasswordDialog.Filename = filename;
// show the document password dialog
DialogResult showDialogResult = enterPasswordDialog.ShowDialog();
// if "OK" button is clicked
if (showDialogResult == DialogResult.OK)
{
DocumentAuthenticationRequest authenticationRequest = new DocumentAuthenticationRequest(
enterPasswordDialog.authenticateTypeComboBox.Text,
enterPasswordDialog.Password);
// uuthenticate the decoder
DocumentAuthorizationResult result = decoder.Authenticate(authenticationRequest);
// if user is NOT authorized
if (!result.IsAuthorized)
{
MessageBox.Show(
string.Format("The {0} password is incorrect.", enterPasswordDialog.authenticateTypeComboBox.Text),
"Error", MessageBoxButtons.OK, MessageBoxIcon.Warning);
}
// if user is authorized
else
{
if (enterPasswordDialog.authenticateTypeComboBox.Text != result.UserName)
{
MessageBox.Show(
string.Format("Authorized as: {0}", result.UserName),
"Authorization Result", MessageBoxButtons.OK, MessageBoxIcon.Information);
}
break;
}
}
// if "Cancel" button is clicked
else
{
return(false);
}
}
}
}
return(true);
}
/// <summary>
/// Opens a form that allows to select image of image collection
/// and returns image collection and selected index.
/// </summary>
/// <param name="filename">The filename of image file.</param>
/// <param name="selectedIndex">Selected index.</param>
/// <returns>Image collection.</returns>
public static ImageCollection SelectImageFromFile(string filename, out int selectedIndex)
{
selectedIndex = -1;
// create image collection
ImageCollection images = new ImageCollection();
DocumentPasswordForm.EnableAuthentication(images);
try
{
try
{
// add an image file to the image collection
images.Add(filename);
}
catch (Exception e)
{
DemosTools.ShowErrorMessage(e);
return(null);
}
selectedIndex = 0;
// if image file contains more than 1 image
if (images.Count > 1)
{
// create a dialog that allows to select image from multipage image file
using (SelectImageForm selectImageForm =
new SelectImageForm(images))
{
// show the dialog
DialogResult result = selectImageForm.ShowDialog();
// if image is selected
if (result == DialogResult.OK)
{
// get the selected index
selectedIndex = selectImageForm.SelectedImageIndex;
}
else
{
selectedIndex = -1;
}
}
}
}
finally
{
DocumentPasswordForm.DisableAuthentication(images);
// if image is not selected
if (selectedIndex == -1)
{
// clear and dispose images from the image collection
images.ClearAndDisposeItems();
// dispose image collection
images.Dispose();
}
}
return(images);
}
