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Date on Day Of the Week

, 2 Oct 2011 CPOL
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Day of the week
I had come across a requirement wherein I had to send some reports to the user on the first day of the month and on the last day of the month based on the day selected by the Admin (e.g., the Day of the week provided by Admin is Sunday).
Well, here is the logic which does the trick:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Globalization;
namespace ConsoleApplication3
    class Demo
        static void Main(string[] args)
            //This was a Interview Question
            //where in i want to find the first 
            DateTime FindLastDate = new DateTime(DateTime.Now.Year ,DateTime.Now.Month , 1).AddMonths(1).AddDays(-1);
            int i=(int)DayOfWeek.Saturday  ;
            int z = (int)FindLastDate.DayOfWeek ;
            DateTime LastDay = FindLastDate.AddDays(z >= i ? (-z + i) : -(z + 7 - i));
            Console.WriteLine("The Date Of The Last " + DayOfWeek.Saturday.ToString() + " Of the Month Is" + LastDay.ToShortDateString());
            DateTime FindFirstDay = new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1);
            z = (int)FindFirstDay.DayOfWeek;
            DateTime FirstDay = FindFirstDay.AddDays(z > i ? (7 - z) + i : (7 - z)-(7-i));
            Console.WriteLine("The Date Of The First " + DayOfWeek.Saturday.ToString() + " Of the Month Is" + FirstDay.ToShortDateString());
Please post your comments and let me know how you like this trick.


This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)


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Comments and Discussions

GeneralReason for my vote of 5 good logic instead of going for forl... PinmemberSantoshyy10-Oct-11 19:36 

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