CODEWITHSUNDEEP
c#
Mike
Mike

Reputation: 2601

Find specific date in the current week

How would I be able to get the date of the Thursday in the current week? For example, Thursday of this current week is 7/8/2010

Upvotes: 8

Views: 7187

Answers (6)

Leniel Maccaferri
Leniel Maccaferri

Reputation: 102448

// This is fixed...
int thursday = 4;

int difference = thursday - (int)DateTime.Now.DayOfWeek;

DateTime thursdayThisWeek = DateTime.Now.Date.AddDays(difference);

Upvotes: 0

Dolph
Dolph

Reputation: 50710

Pseudo code to find nearest Thursday:

for 0 to 3 as x
    if today + x days is Thursday
        return (today + x days)
    if today - x days is Thursday
        return (today - x days)

Pseudo code to find Thursday this week:

lookForward = true
lookBackward = true
FirstDayOfTheWeek = Sunday

for 0 to 6 as x
    if today + x days is FirstDayOfTheWeek
        lookForward = false
    if today - x days is FirstDayOfTheWeek
        lookBackward = false
    if lookForward and today + x days is Thursday
        return (today + x days)
    if lookBackward and today - x days is Thursday
        return (today - x days)

Sorry, I don't speak C# :)

Upvotes: 0

ChaosPandion
ChaosPandion

Reputation: 78292

private static DateTime GetDayOfWeek(DayOfWeek dayOfWeek)
{
    var date = DateTime.Now;
    if (date.DayOfWeek != dayOfWeek)
    {
        var direction = date.DayOfWeek > dayOfWeek ? -1D : 1D;
        do
        {
            date = date.AddDays(direction);
        } while (date.DayOfWeek != dayOfWeek);
    }
    return date;
}

Upvotes: 1

LBushkin
LBushkin

Reputation: 131806

You can do this (alebit awkwardly) with the existing .NET DateTime. The trick is to use the DayOfWeek enum as an integer - since it denotes the days Sun - Sat in ascending numeric order (0-6).

DateTime someDay = DateTime.Today;
var daysTillThursday = (int)someDay.DayOfWeek - (int)DayOfWeek.Thursday;
var thursday = someDay.AddDays( daysTillThursday );

Or even more simply:

var today = DateTime.Today;
var thursday = today.AddDays(-(int)today.DayOfWeek).AddDays(4);

Upvotes: 17

Curt
Curt

Reputation: 454

DateTime.Today.AddDays(-(int)DateTime.Today.DayOfWeek).AddDays(4)

Upvotes: 4

DanP
DanP

Reputation: 6478

Check out this library: http://datetimeextensions.codeplex.com/

From the examples on the home page:

DateTime nextFriday = DateTime.Now.Next(DayOfWeek.Friday);

Upvotes: 1

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