How to get the start and end times of a day

Question

In my C# app, I pass a string variable that is of format yyyymmdd-yyyymmdd that represents a from and to date. I want to get the start and end times for these dates respecti

Answer 1

If you are only worried about .Net precision...

startDate = DateTime.ParseExact(dates[0], "yyyyMMdd");
endDate = DateTime.ParseExact(dates[1], "yyyyMMdd").AddTicks(-1).AddDays(1);

You really don't need to concatenate extra values onto the string for the time portion.

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As an addendum, if you are using this for a query against, for example, a database...

startDate = DateTime.ParseExact(dates[0], "yyyyMMdd");
endDate = DateTime.ParseExact(dates[1], "yyyyMMdd").AddDays(1);

With a query of...

WHERE "startDate" >= @startDate AND "endDate" < @endDate

Then the precision issues noted in the comments won't really matter. The endDate in this case would not be part of the range, but the outside boundary.