CODEWITHSUNDEEP
c#datetime
yesman
yesman

Reputation: 7829

DateTime go to first occurrence of hour/minute/second

Given this datetime of January 1 2015 at 23:00 hours: 

var someDate = new DateTime(2015, 1, 1, 23, 0, 0);

And given the int 6, which is the desired hour, how do I return the first following datetime where the hour is 6? In this case, someDate and 6 would return a new DateTime of January 2 2015 at 06:00 hours.

Upvotes: 0

Views: 100

Answers (5)

Richard Irons
Richard Irons

Reputation: 1473

Something like this should do it:

public DateTime FollowingHour(DateTime start, int hour)
{
    DateTime atHour = start.Date.AddHours(6);

    if(atHour < start)
    {
        atHour += TimeSpan.FromDays(1);
    }

    return atHour;
}

Upvotes: 0

TTomer
TTomer

Reputation: 356

Assuming you meant 24h clock, you can try this:

    public DateTime GetDate(DateTime someDate,int hour)
    {
       return someDate.Hour>=hour? someDate.Date.AddDays(1).AddHours(6):someDate.Date.AddHours(6);
    }

Upvotes: 0

jgondev
jgondev

Reputation: 246

Try this:

while(someDate.Hour != 6){
    someDate = someDate.AddHours(1);
}

Upvotes: 0

RePierre
RePierre

Reputation: 9566

You just have to add one day to the date and six hours to the result:

var someDate = new DateTime(2015, 1, 1, 23, 0, 0);
var result = someDate.Date.AddDays(1).AddHours(6);

Note the use of Date property - it will give you the start od the day and from there it's easy to navigate forward.

Upvotes: 0

Ren&#233; Vogt
Ren&#233; Vogt

Reputation: 43886

I would simply add the hours to the original date and add another day if the result is before the original time:

var someDate = new DateTime(2015, 1, 1, 23, 0, 0);
var result = someDate.Date.AddHours(6); // note the "Date" part
if (result < someDate) result = result.AddDays(1);

Upvotes: 3

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