CODEWITHSUNDEEP
c#datetime
frenchie
frenchie

Reputation: 52047

difference between two date times

I want to calculate the difference between two DateTimes. This is what I have:

if ((DateTime.Now.Date - TheUTCDateTime.Date).TotalMinutes > 180) 
{ 
      ValidObject = false;
}

Basically, I want to make sure that TheUTCDateTime is not more than 3 hours old. Is what I am doing the best way to do this?

Upvotes: 0

Views: 76

Answers (3)

Reda
Reda

Reputation: 2289

If you want to check whether TheUTCDateTime is older than 3 hours, you shouldn't be using the .Date property:

DateTime.UtcNow - TheUTCDateTime > TimeSpan.FromHours(3)

Upvotes: 1

Lee
Lee

Reputation: 144206

You probably don't want to extract the date and maybe want to use UtcNow instead of Now. You can also use TimeSpan.FromHours for the period:

if ((DateTime.UtcNow - TheUTCDateTime) > TimeSpan.FromHours(3))

or simply

ValidObject = (DateTime.UtcNow - TheUTCDateTime) <= TimeSpan.FromHours(3);

Upvotes: 3

Tim Schmelter
Tim Schmelter

Reputation: 460288

Your approach is ok, but you could improve it a little bit:

TimeSpan span = DateTime.Now - TheUTCDateTime.Date;
ValidObject = span.TotalHours <= 3;

Since you want to check the hours i have used TotalHours, i have used DateTime.Now instead of Date which truncates the time and i set it also to true whereas your code only sets it to false.

Upvotes: 1

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