/// <summary>Returns a DialogResult indicating the user action.</summary>
/// <param name="owner">The System.Windows.Forms.IWin32Window the dialog will display in front of.</param>
/// <remarks>
/// Sets the name, password and SaveChecked accessors to the state of the dialog as it was dismissed by the user.
/// </remarks>
private DialogResult ShowDialog(IWin32Window owner)
{
// set the api call parameters
StringBuilder name = new StringBuilder(CredUi.MAX_USERNAME_LENGTH);
name.Append(Name);
StringBuilder password = new StringBuilder(CredUi.MAX_PASSWORD_LENGTH);
password.Append(Password);
int saveChecked = Convert.ToInt32(SaveChecked);
CredUi.INFO info = GetInfo(owner);
CredUi.CredFlags credFlags = GetFlags();
// make the api call
CredUi.ReturnCodes code = CredUi.CredUIPromptForCredentials(
ref info,
Target,
IntPtr.Zero, 0,
name, CredUi.MAX_USERNAME_LENGTH,
password, CredUi.MAX_PASSWORD_LENGTH,
ref saveChecked,
credFlags
);
// clean up resources
if (Banner != null)
{
DeleteObject(info.hbmBanner);
}
// set the accessors from the api call parameters
Name = name.ToString();
Password = password.ToString();
SaveChecked = Convert.ToBoolean(saveChecked);
return(GetDialogResult(code));
}
/// <summary>Returns a DialogResult from the specified code.</summary>
/// <param name="code">The credential return code.</param>
private DialogResult GetDialogResult(CredUi.ReturnCodes code)
{
DialogResult result;
switch (code)
{
case CredUi.ReturnCodes.NO_ERROR:
result = DialogResult.OK;
break;
case CredUi.ReturnCodes.ERROR_CANCELLED:
result = DialogResult.Cancel;
break;
case CredUi.ReturnCodes.ERROR_NO_SUCH_LOGON_SESSION:
throw new ApplicationException("No such logon session.");
case CredUi.ReturnCodes.ERROR_NOT_FOUND:
throw new ApplicationException("Not found.");
case CredUi.ReturnCodes.ERROR_INVALID_ACCOUNT_NAME:
throw new ApplicationException("Invalid account name.");
case CredUi.ReturnCodes.ERROR_INSUFFICIENT_BUFFER:
throw new ApplicationException("Insufficient buffer.");
case CredUi.ReturnCodes.ERROR_INVALID_PARAMETER:
throw new ApplicationException("Invalid parameter.");
case CredUi.ReturnCodes.ERROR_INVALID_FLAGS:
throw new ApplicationException("Invalid flags.");
default:
throw new ApplicationException("Unknown credential result encountered.");
}
return(result);
}
