Regular DateTime question

Question

I'm writing a service but I want to have config settings to make sure that the service does not run within a certain time window on one day of the week. eg Mondays between 17:00 and 19:00.

Is it possible to create a datetime that represents any monday so I can have one App config key for DontProcessStartTime and one for DontProcessEndTime with a values like "Monday 17:00" and "Monday 19:00"?

Otherwise I assume I'll have to have separate keys for the day and time for start and end of the time window.

Any thoughts?

thanks

score 4 · Accepted Answer · edited May 23 '17 at 12:18

4

You could use a utility that will parse your weekday text into a System.DayOfWeek enumeration, example here. You can then use the Enum in a comparison against the DateTime.Now.DayOfWeek

edited May 23 '17 at 12:18

Community

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answered Oct 29 '10 at 15:41

Lazarus

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There is Enum.TryParse generic method in .NET 4.0 – Andrew Bezzub Oct 29 '10 at 15:44
@Andrew Bezzub - Good to know, great comment! – Lazarus Oct 29 '10 at 15:46
In case you are not using .NET 4.0 the DateTime struct also has a TryParse method. – Simon Fischer Oct 29 '10 at 15:52
@Fischer - Would DateTime.TryParse extract anything useful out of "Monday 17:00"? – Lazarus Oct 29 '10 at 15:59
I am not sure of that, I expect it is necessary to do some preprocessing. It was just as an alternative to the .NET 4.0 Enum.Parse method. – Simon Fischer Oct 29 '10 at 16:10

score 2 · Answer 2 · answered Oct 29 '10 at 15:44

You can save the day of the week and start hour and endhour in your config file, and then use a function similar to the following:

public bool ShouldRun(DateTime dateToCheck)
{
     //These should be read from your config file:
     var day = DayOfWeek.Monday;
     var start = 17;
     var end = 19;

     return !dateToCheck.DayOfWeek == day &&
            !(dateToCheck.Hour >= start && dateToCheck.Hour < end);
}

score 1 · Answer 3 · answered Oct 29 '10 at 15:40

1

You can use DayOfTheWeek property of the DateTime. And to check proper time you can use DateTime.Today (returns date-time set to today with time set to 00:00:00) and add to it necessary amount of hours and minutes.

answered Oct 29 '10 at 15:40

Andrew Bezzub

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score 1 · Answer 4 · 2010-10-29T15:56:00.870

This is very rough code, but illustrates that you can check a DateTime object containing the current time as you wish to do:

protected bool IsOkToRunNow()
{
    bool result = false;

    DateTime currentTime = DateTime.Now;

    if (currentTime.DayOfWeek != DayOfWeek.Monday && (currentTime.Hour <= 17 || currentTime.Hour >= 19))
    {
        result = true;
    }

    return result;
}

score 1 · Answer 5 · answered Oct 29 '10 at 15:44

The DateTime object cannot handle a value that means all mondays. It would have to be a specific Monday. There is a DayOfWeek enumeration. Another object that may help you is a TimeSpan object. You could use the DayOfWeek combined with TimeSpan to tell you when to start, then use another TimeSpan to tell you how long

Regular DateTime question

5 Answers5