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c#utc

calculate the difference between two UTC times in hours C#

How do I calculate the difference between two UTC times in hours?

This is what I have tried:

// var lastSuccessfulRunTime = 2023-01-01T00:00:00Z UTC Time
int timeDifference = (DateTime.UtcNow - lastSuccessfulRunTime).Hours

if (DateTime.UtcNow - lastSuccessfulRunTime) = 9.00:00:00.7944388, timeDifference will be 0 which is not what I need.

Solution

  • The Hours property returns the integer hours value of the timespace.

    i.e. for an hour and a half, it would give you 1.

    The TotalHours property, converts the entire timespan into the double representation.

    i.e. for an hour and a half, it would give you 1.5

    You want:

    double timeDifference = (DateTime.UtcNow - lastSuccessfulRunTime).TotalHours

    (note, your int variable type is also wrong)

    This applies to all of the time-component properties on a DateTime