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  4. how can i find number of days in a given year and month

how can i find number of days in a given year and month

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  • P Pete OHanlon

    Ooh - not quite. If it's a century, it has to be divisible by 400 to be a leap year, so 2000 is a leap year and 2100 isn't.

    "WPF has many lovers. It's a veritable porn star!" - Josh Smith

    As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

    My blog | My articles | MoXAML PowerToys | Onyx

    R Offline
    R Offline
    Rajesh R Subramanian
    wrote on last edited by
    #6

    Let us hope that his code will not have to run for a century. :)

    It is a crappy thing, but it's life -^ Carlo Pallini

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    • P Pete OHanlon

      Ooh - not quite. If it's a century, it has to be divisible by 400 to be a leap year, so 2000 is a leap year and 2100 isn't.

      "WPF has many lovers. It's a veritable porn star!" - Josh Smith

      As Braveheart once said, "You can take our freedom but you'll never take our Hobnobs!" - Martin Hughes.

      My blog | My articles | MoXAML PowerToys | Onyx

      M Offline
      M Offline
      musefan
      wrote on last edited by
      #7

      is 2100 really not a leap year? EDIT: It's OK I WIKI it and got an answer ;)

      Life goes very fast. Tomorrow, today is already yesterday.

      A 1 Reply Last reply
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      • M musefan

        use modulus (provides the remainder after a division) not divide...

        if(year % 4 == 0)
        //is leap year
        else
        //not leap year

        Life goes very fast. Tomorrow, today is already yesterday.

        A Offline
        A Offline
        Ahmed Khallaf
        wrote on last edited by
        #8

        Many Thanks and i'm very happy from Your cooperation

        M 1 Reply Last reply
        0
        • M musefan

          is 2100 really not a leap year? EDIT: It's OK I WIKI it and got an answer ;)

          Life goes very fast. Tomorrow, today is already yesterday.

          A Offline
          A Offline
          Ahmed Khallaf
          wrote on last edited by
          #9

          i dont think

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          • A Ahmed Khallaf

            how can i find number of days in a given year and month

            L Offline
            L Offline
            Lost User
            wrote on last edited by
            #10

            int daysInMonth = DateTime.DaysInMonth(2009, 2);
            Console.WriteLine(daysInMonth);

            A 1 Reply Last reply
            0
            • L Lost User

              int daysInMonth = DateTime.DaysInMonth(2009, 2);
              Console.WriteLine(daysInMonth);

              A Offline
              A Offline
              Ahmed Khallaf
              wrote on last edited by
              #11

              i don't know if the user will enter 2009 or 2008 or any month i want to take the data from the user

              modified on Tuesday, June 2, 2009 4:19 AM

              G 1 Reply Last reply
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              • A Ahmed Khallaf

                Many Thanks and i'm very happy from Your cooperation

                M Offline
                M Offline
                musefan
                wrote on last edited by
                #12

                Ok this is what you should use instead...

                if(year % 4 == 0 && year % 100 == 0 ? year % 400 == 0 : true)//hope you get that logic
                //is leap year
                else
                //not leap year

                Life goes very fast. Tomorrow, today is already yesterday.

                A G 2 Replies Last reply
                0
                • M musefan

                  Ok this is what you should use instead...

                  if(year % 4 == 0 && year % 100 == 0 ? year % 400 == 0 : true)//hope you get that logic
                  //is leap year
                  else
                  //not leap year

                  Life goes very fast. Tomorrow, today is already yesterday.

                  A Offline
                  A Offline
                  Ahmed Khallaf
                  wrote on last edited by
                  #13

                  you realy have come to the right solution thank you

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                  • A Ahmed Khallaf

                    i don't know if the user will enter 2009 or 2008 or any month i want to take the data from the user

                    modified on Tuesday, June 2, 2009 4:19 AM

                    G Offline
                    G Offline
                    Guffa
                    wrote on last edited by
                    #14

                    Then you just use variables in the call to the DaysInMonth method instead of the literal values used in the example.

                    Despite everything, the person most likely to be fooling you next is yourself.

                    1 Reply Last reply
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                    • M musefan

                      Ok this is what you should use instead...

                      if(year % 4 == 0 && year % 100 == 0 ? year % 400 == 0 : true)//hope you get that logic
                      //is leap year
                      else
                      //not leap year

                      Life goes very fast. Tomorrow, today is already yesterday.

                      G Offline
                      G Offline
                      Guffa
                      wrote on last edited by
                      #15

                      Or if you don't want to reinvent the wheel:

                      if (DateTime.IsLeapYear(year)) {
                      // is leap year
                      } else {
                      // not leap year
                      }

                      ;)

                      Despite everything, the person most likely to be fooling you next is yourself.

                      M 1 Reply Last reply
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                      • G Guffa

                        Or if you don't want to reinvent the wheel:

                        if (DateTime.IsLeapYear(year)) {
                        // is leap year
                        } else {
                        // not leap year
                        }

                        ;)

                        Despite everything, the person most likely to be fooling you next is yourself.

                        M Offline
                        M Offline
                        musefan
                        wrote on last edited by
                        #16

                        I think we all need new wheels :)

                        Life goes very fast. Tomorrow, today is already yesterday.

                        1 Reply Last reply
                        0
                        • A Ahmed Khallaf

                          how can i find number of days in a given year and month

                          A Offline
                          A Offline
                          Ahmed Khallaf
                          wrote on last edited by
                          #17

                          i finished simple code for this topic and i want you to review it sory for not optimized code but see the idea download the project: http://www.geocities.com/ahmed_117/Month.zip[^]

                          G 1 Reply Last reply
                          0
                          • A Ahmed Khallaf

                            i finished simple code for this topic and i want you to review it sory for not optimized code but see the idea download the project: http://www.geocities.com/ahmed_117/Month.zip[^]

                            G Offline
                            G Offline
                            Guffa
                            wrote on last edited by
                            #18

                            Have a look at this:

                            private void button1_Click(object sender, EventArgs e) {
                            button1.Enabled = false;
                            int year = dateTimePicker1.Value.Year;
                            int month = dateTimePicker1.Value.Month;
                            DateTime start = new DateTime(year, month, 1);
                            dateTimePicker1.Value = start;
                            int days = DateTime.DaysInMonth(year, month);
                            for (int i = 0; i < days; i++) {
                            dataGridView1.Rows.Add();
                            dataGridView1.Rows[i].Cells[0].Value = start.AddDays(i).DayOfWeek;
                            dataGridView1.Rows[i].Cells[1].Value = start.AddDays(i).ToShortDateString();
                            }
                            }

                            Despite everything, the person most likely to be fooling you next is yourself.

                            A 1 Reply Last reply
                            0
                            • G Guffa

                              Have a look at this:

                              private void button1_Click(object sender, EventArgs e) {
                              button1.Enabled = false;
                              int year = dateTimePicker1.Value.Year;
                              int month = dateTimePicker1.Value.Month;
                              DateTime start = new DateTime(year, month, 1);
                              dateTimePicker1.Value = start;
                              int days = DateTime.DaysInMonth(year, month);
                              for (int i = 0; i < days; i++) {
                              dataGridView1.Rows.Add();
                              dataGridView1.Rows[i].Cells[0].Value = start.AddDays(i).DayOfWeek;
                              dataGridView1.Rows[i].Cells[1].Value = start.AddDays(i).ToShortDateString();
                              }
                              }

                              Despite everything, the person most likely to be fooling you next is yourself.

                              A Offline
                              A Offline
                              Ahmed Khallaf
                              wrote on last edited by
                              #19

                              a very Clever man this what i want to reach thank you

                              1 Reply Last reply
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