/// <summary>
/// Throws the correct Site Destination exception for a given WinInet Error Code.
/// This attempts to map common WinInet errors to corresponding Destination errors.
/// </summary>
/// <param name="error">The WinInet error code</param>
private void ThrowDestinationException(int error)
{
// Exception detail data
string exceptionType = null;
string extendedMessage = WinInet.GetExtendedInfo();
if (extendedMessage == null || extendedMessage == String.Empty)
{
extendedMessage = "The source of the error is unknown.";
}
SiteDestinationException exception = null;
// This wraps the lower level WinInet errors into higher level
// Site destination exceptions. It also gathers extended info from
// the connection to assist with troubleshooting.
switch (error)
{
case ERROR_INTERNET.CANNOT_CONNECT:
exceptionType = SiteDestinationException.ConnectionException;
break;
case ERROR_INTERNET.NAME_NOT_RESOLVED:
exceptionType = SiteDestinationException.ConnectionException;
break;
case ERROR_INTERNET.ITEM_NOT_FOUND:
exceptionType = SiteDestinationException.TransferException;
break;
case ERROR_INTERNET.TIMEOUT:
exceptionType = SiteDestinationException.TransferException;
break;
case ERROR_INTERNET.LOGIN_FAILURE:
exception = new LoginException(null, error);
break;
case ERROR_INTERNET.INCORRECT_PASSWORD:
exception = new LoginException(null, error);
break;
case ERROR_INTERNET.INCORRECT_USER_NAME:
exception = new LoginException(null, error);
break;
case ERROR_INTERNET.EXTENDED_ERROR:
exceptionType = SiteDestinationException.UnexpectedException;
break;
default:
exceptionType = SiteDestinationException.UnexpectedException;
break;
}
// Set up a sitedestination exception with the correct information
if (exception == null)
{
exception = new SiteDestinationException(
null,
exceptionType,
GetType().Name,
error);
}
exception.DestinationErrorCode = error;
exception.DestinationType = GetType().Name;
exception.DestinationExtendedMessage = extendedMessage;
// throw it
throw exception;
}