private HistoryDataPoint ImportHistoryDataPoint(string[] fields, System.Globalization.CultureInfo culture)
{
HistoryDataPoint dataPoint = new HistoryDataPoint();
dataPoint.TimeStamp = DateTime.Parse(fields[0], culture);
dataPoint.Kwh = Convert.ToDouble(fields[2], culture);
dataPoint.Sensor = Convert.ToInt32(fields[3]);
return(dataPoint);
}
// parse data node of history message and write data to database
private void ParseHistoryData(XPathNavigator navigator, int daysSinceBirth, int daysSinceWipe)
{
List <HistoryDataPoint> historyData = new List <HistoryDataPoint>();
int sensor = 0;
char elementStart = '0';
XPathNodeIterator days = navigator.SelectChildren(XPathNodeType.Element);
foreach (XPathNavigator day in days)
{
// get sensor number from the first child
if (day.Name == "sensor")
{
sensor = day.ValueAsInt;
if (sensor > maxSensors - 1) // check this because maxSensors is configurable
{
return;
}
}
else if (day.Name.Length > 1)
{
elementStart = day.Name[0];
int timeUnitsAgo = Convert.ToInt32(day.Name.Substring(1));
// timestamp is last odd hour
DateTime timeStamp = CalculateTimeStamp(LastTime, elementStart, timeUnitsAgo,
Math.Min(daysSinceBirth, daysSinceWipe));
double kwh = day.ValueAsDouble;
// Only save history data with non-zero value
if (kwh != 0)
{
HistoryDataPoint point = new HistoryDataPoint(timeStamp, sensor, kwh);
historyData.Add(point);
}
}
}
// write to database
switch (elementStart)
{
case TwoHourElementStart:
database.SaveTwoHourHistory(historyData);
break;
case DayElementStart:
database.SaveDayHistory(historyData);
break;
case MonthElementStart:
database.SaveMonthHistory(historyData);
break;
default:
throw new Exception("XML contains unknown history type");
}
} // end parseHistoryData
private List <HistoryDataPoint> DoHistoryQuery(string query)
{
List <HistoryDataPoint> result = new List <HistoryDataPoint>();
DataTable dt = GetDataTable(query);
foreach (DataRow row in dt.Rows)
{
HistoryDataPoint point = new HistoryDataPoint();
point.TimeStamp = Convert.ToDateTime(row["TimeStamp"]);
point.Sensor = Convert.ToInt32(row["Sensor"]);
point.Kwh = Convert.ToDouble(row["kWh"]);
result.Add(point);
}
return(result);
}
