public QueryFilter()
{
QueryRange = new QueryRange();
TopCount = 0;
SkipCount = 0;
ExcludeStartItem = false;
}
/// <summary>
/// This is a very important function in Range design.
///
/// [2012-03-11, 2014-08-22] => [2012-03-11, 2012-12-31], [2013-01-01, 2013-12-31], [2014-01-01, 2014-08-22]
/// [2014-02-03, 2014-08-22] => [2014-02-03, 2014-02-28], [2014-03-01, 2014-03-31], ..., [2014-08-01, 2014-08-22]
/// [2014-08-03 2:00:00, 2014-08-03 4:00:00] => [2014-08-03 2:00:00, 2014-08-03 3:00:00], [2014-08-03 3:00:00, 2014-08-03 4:00:00]
/// </summary>
/// <returns></returns>
public List <QueryRange> GetDividedRanges()
{
DateTime rangedStartDate = GetRangedStartDate();
DateTime rangedEndDate = GetRangedEndDate();
TimeSpan span = rangedEndDate - rangedStartDate;
if (span < new TimeSpan(0, 5, 0))
{
return(null);
}
double intervalSeconds = span.TotalSeconds / DividRangeFactor;
List <QueryRange> resultRange = new List <QueryRange>();
QueryRange range;
DateTime previousTimeStamp = rangedStartDate;
DateTime lastTimeStamp;
for (int i = 0; i < DividRangeFactor - 1; i++)
{
lastTimeStamp = previousTimeStamp.AddSeconds(intervalSeconds);
range = new QueryRange(previousTimeStamp, lastTimeStamp);
resultRange.Add(range);
previousTimeStamp = lastTimeStamp;
}
range = new QueryRange(previousTimeStamp, rangedEndDate);
resultRange.Add(range);
return(resultRange);
}
