how to write number of days in c#

Question

how can I write program in c# that show the number of the day

for example :

I ask a user to type a day and he write Monday and I want to show him 2

google: C# day of week| First entry: https://msdn.microsoft.com/en-us/library/bb762911(v=vs.110).aspx — jean, Feb 23 '15 at 11:04

dyatchenko · Accepted Answer · 2015-02-23T11:20:23.553

1

Try to use DateTime.Now.DayOfWeek. Definition:

namespace System
{
    using System.Runtime.InteropServices;

    [Serializable, ComVisible(true), __DynamicallyInvokable]
    public enum DayOfWeek
    {
        [__DynamicallyInvokable]
        Friday = 5,
        [__DynamicallyInvokable]
        Monday = 1,
        [__DynamicallyInvokable]
        Saturday = 6,
        [__DynamicallyInvokable]
        Sunday = 0,
        [__DynamicallyInvokable]
        Thursday = 4,
        [__DynamicallyInvokable]
        Tuesday = 2,
        [__DynamicallyInvokable]
        Wednesday = 3
    }
}

Example:

// For your case Monday == 2
int todayDayOfWeekNumber = (int)DateTime.Now.DayOfWeek + 1;

edited Feb 23 '15 at 11:20

answered Feb 23 '15 at 11:03

dyatchenko

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`DayOfWeek` return the name of the day. Not a number. – Raging Bull Feb 23 '15 at 11:11
Voting is anonymous... – rene Feb 23 '15 at 11:11
@RagingBull except if it is casted in `int`. `If cast to an integer, its value ranges from zero (which indicates DayOfWeek.Sunday) to six (which indicates DayOfWeek.Saturday).` – Xaruth Feb 23 '15 at 11:14
@RagingBull It also returns a number, you have to just cast it. – dyatchenko Feb 23 '15 at 11:14
@dyatchenko: Yup, removed my downvote. – Raging Bull Feb 23 '15 at 11:17

Raging Bull · Answer 2 · 2015-02-23T11:19:14.907

0

Try this:

(System.DateTime.Now.Day) % 7;     //will return integer 2 for Monday

Example:

DateTime inputDate = System.DateTime.Now;
System.Windows.Forms.MessageBox.Show(((inputDate.Day)%7).ToString());

OR:

Using DayOfWeek (just like dyatchenko mentioned):

((int)DateTime.Now.DayOfWeek + 1)

DayOfWeek starts from Sunday (with 0). So if you want to get 2 for Monday, just add 1.

edited Feb 23 '15 at 11:19

answered Feb 23 '15 at 11:06

Raging Bull

18,593
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`value ranges from zero (which indicates DayOfWeek.Sunday) to six (which indicates DayOfWeek.Saturday)` https://msdn.microsoft.com/fr-fr/library/system.datetime.dayofweek%28v=vs.110%29.aspx – Xaruth Feb 23 '15 at 11:20

how to write number of days in c#

2 Answers2