public void Login()
{
QrzDataResult result;
WebClient webClient = ThreadWebClient;
result = new QrzDataResult(string.Format("{0}?username={1}&password={2}&agent={3}", c_ServerUrl, m_Username, m_Password, c_Agent), webClient);
XmlElement sessionElement = result.GetElement("/qrz:QRZDatabase/qrz:Session/qrz:Key");
if (sessionElement != null)
{
m_Session = sessionElement.InnerText;
Debug.WriteLine("Session key: " + m_Session);
}
else
{
XmlElement errorElement = result.GetElement("/qrz:QRZDatabase/qrz:Session/qrz:Error");
if (errorElement != null)
throw new InvalidDataException("Login to QRZ.com failed: " + errorElement.InnerText);
else
throw new InvalidDataException("Login to QRZ.com failed");
}
}
private QrzEntry LookupCallsign(string callsign, bool firstTry)
{
if (m_Session == null)
Login();
QrzDataResult result = new QrzDataResult(string.Format("{0}?s={1}&callsign={2}", c_ServerUrl, m_Session, callsign), ThreadWebClient);
XmlElement callsignElement = result.GetElement("/qrz:QRZDatabase/qrz:Callsign");
if (callsignElement != null)
{
QrzEntry entry = new QrzEntry();
entry.Callsign = callsignElement["call"].InnerText;
if (callsignElement["grid"] != null)
entry.Locator = new Locator(callsignElement["grid"].InnerText);
if (callsignElement["fname"] != null && callsignElement["name"] != null)
entry.Name = callsignElement["fname"].InnerText + " " + callsignElement["name"].InnerText;
return entry;
}
else
{
XmlElement errorElement = result.GetElement("/qrz:QRZDatabase/qrz:Session/qrz:Error");
if (errorElement != null)
{
// If our session key has expired, nuke it and try again - once!
if (errorElement.InnerText == "Invalid session key" && firstTry)
{
m_Session = null;
return LookupCallsign(callsign, false);
}
throw new InvalidDataException("QRZ.com lookup failed: " + errorElement.InnerText);
}
else
{
throw new InvalidDataException("QRZ.com lookup failed");
}
}
}