public T this[DateTime idx]
{
get
{
if (!Data.ContainsKey(idx))
{
Data.Add(idx, default(T));
DataDescending.Add(idx, default(T));
}
return(Data[idx]);
}
set
{
if (!Data.ContainsKey(idx))
{
Data.Add(idx, default(T));
DataDescending.Add(idx, default(T));
}
Data[idx] = value;
DataDescending[idx] = value;
}
}
public void Dispose()
{
Data.Clear();
DataDescending.Clear();
}
public void Add(DateTime key, T value)
{
Data.Add(key, value);
DataDescending.Add(key, value);
}
/// <summary>
/// Return a number of historic data points from a point in time backwards indexed by time
/// </summary>
/// <param name="dateTime">The start time at which the data range should start from</param>
/// <param name="count">The number of data points into the past</param>
/// <returns>The values indexed by their times of the data points found</returns>
public IEnumerable <KeyValuePair <DateTime, T> > GetPreviousData(DateTime dateTime, int count)
{
var rv = DataDescending.Where(i => i.Key <= dateTime).Take(count);
return(rv);
}