public PollQuestion GetActiveQuestion()
{
PollQuestion ret = null;
//For real-time applications, you can get data from databases like SQL Server
string sampleXmlString = SampleData.GetActivePollQuestion();
XmlDocument pollQuestionXmlDoc = new XmlDocument();
pollQuestionXmlDoc.LoadXml(sampleXmlString);
XmlElement root = pollQuestionXmlDoc.DocumentElement;
XmlNode activeNode = pollQuestionXmlDoc.SelectSingleNode("//PollQuestion/Active");
if (root.Name == "PollQuestion")
{
ret = new PollQuestion();
ret.ID = pollQuestionXmlDoc.SelectSingleNode("//PollQuestion/ID").InnerText;
ret.Question = pollQuestionXmlDoc.SelectSingleNode("//PollQuestion/Question").InnerText;
string activeStatus = pollQuestionXmlDoc.SelectSingleNode("//PollQuestion/Active").InnerText;
ret.Active = Boolean.Parse(activeStatus);
XmlNodeList answerChoices = pollQuestionXmlDoc.SelectNodes("//PollQuestion/AnswerGroup/Answer");
if (answerChoices != null && answerChoices.Count > 0)
{
ret.AnswerGroup = new List<string>();
foreach (XmlNode answer in answerChoices)
{
ret.AnswerGroup.Add(answer.InnerText);
}
}
}
return ret;
}
public static bool ConfigurePollQuestionMonitor(PollQuestion pollQuestion)
{
bool ret = false;
//Based on the design of the application, you can have unique id or name
string pubnubChannel = pollQuestion.ID;
mrePresenceConnect.AddOrUpdate(pubnubChannel, new ManualResetEvent(false), (key, oldState) => new ManualResetEvent(false));
presenceChannelConnected[pubnubChannel] = false;
pubnub.Presence<string>(pubnubChannel, PollQuestionMonitorRegularCallback, PollQuestionMonitorConfiguredCallback, PollQuestionMonitorErrorCallback);
mrePresenceConnect[pubnubChannel].WaitOne(TimeSpan.FromSeconds(10));
if (presenceChannelConnected[pubnubChannel])
{
ret = true;
}
return ret;
}
