CODEWITHSUNDEEP
c#datetimedatetime-formatdayofweek
Hitesh S
Hitesh S

Reputation: 580

Need Function to Get First day and last day of current week

I have two labels First day and Last day in which I want to update it on button click.

I need Function to Get First day and last day of current date so that I can display it on click of next and previous button.

Here is what I have so far:

CultureInfo cultureInfo = CultureInfo.CurrentCulture; 
DayOfWeek firstDay = cultureInfo.DateTimeFormat.FirstDayOfWeek; 
firstDayInWeek = dayInWeek.Date; 
lastDayInWeek = dayInWeek.Date; 
while (firstDayInWeek.DayOfWeek != firstDay) 
    firstDayInWeek = firstDayInWeek.AddDays(-1);

but does not give me the next week after this month.

This is what exactly i'm looking for :

Any one can help to make this working using a single function.

Upvotes: 0

Views: 11958

Answers (3)

Nikhil
Nikhil

Reputation: 89

DateTime baseDate = DateTime.Now;
var thisWeekStart = baseDate.AddDays(-(int)baseDate.DayOfWeek);
var thisWeekEnd = thisWeekStart.AddDays(7).AddSeconds(-1);

Upvotes: 8

Nasreddine
Nasreddine

Reputation: 37798

Try this :

private static void GetWeek(DateTime now, CultureInfo cultureInfo, out DateTime begining, out DateTime end)
{
    if (now == null)
        throw new ArgumentNullException("now");
    if (cultureInfo == null)
        throw new ArgumentNullException("cultureInfo");

    var firstDayOfWeek = cultureInfo.DateTimeFormat.FirstDayOfWeek;

    int offset = firstDayOfWeek - now.DayOfWeek;
    if (offset != 1)
    {
        DateTime weekStart = now.AddDays(offset);
        DateTime endOfWeek = weekStart.AddDays(6);
        begining = weekStart;
        end = endOfWeek;
    }
    else
    {
        begining = now.AddDays(-6);
        end = now;
    }
}

Usage example:

DateTime begining;
DateTime end;

var testDate = new DateTime(2012, 10, 10);
GetWeek(testDate, new CultureInfo("fr-FR"), out begining, out end);
Console.WriteLine("Week {0} - {1}", 
                  begining.ToShortDateString(), 
                  end.ToShortDateString()); // will output Week 10/8/2012 - 10/14/2012

Upvotes: 7

Rob Smyth
Rob Smyth

Reputation: 1858

So, on a button click, you have a one week period. Lets say that is defined by a starting date. The DateTime structure has a property DayOfWeek that returns an enum like DayOfWeek.Sunday. So here is a code fragment that may help:

var startOfWeek = DateTime(xx, yy ...); // defined by your business code

var firstDayOfWeek = startOfWeek.DayOfWeek;
var lastDayOfWeek = firstDayOfWeek.AddDays(6).DayOfWeek;

I have not compiled this code, straight off my head, so hope it is okay.

Upvotes: 0

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