HourBeg Function

[jacklondon]

Hi Mikhail,

could you please explain why the hour beginning condition is entered as

nowDT.Minute == 1

and not

nowDT.Minute == 0?

Regards

[Mikhail]

Hi,

Where in the source code these lines are located?

[jacklondon]

They are taken from “CalcEngine.cs”, Formulas Table HourBeg():

bool HourBeg()
{
    DateTime nowDT = DateTime.Now;
    DateTime execDT;
    if (nowDT.Minute == 1 && (!HourBegDict.TryGetValue(CnlNum, out execDT) || 
        execDT < new DateTime(nowDT.Year, nowDT.Month, nowDT.Day, nowDT.Hour, 0, 0)))
    {
        HourBegDict[CnlNum] = nowDT;
        return true;
    }
    else
    {
        return false;
    }
}

[Mikhail]

This approach is useful to store values in the archive in the beginning of a new hour and then reset them, for example.
You can write HourBeg2() with your own logic.

[jacklondon]

Hi Mikhail,

Yes, i understood that already. The question is why you implemented it the condition nowDT.Minute == 1 (and not == 0) as the hour begins with for example 12:00.

Regards

[Mikhail]

Hi,
If you change it to == 0, the function may be executed before hourly data are stored in the archive. In most cases this doesn’t fit.
How do you plan to use this function?

[Author]

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