Question

I made a <List>DateTime class which named GetDataRange so that users can get days between two specific days.

Then I want to show days in the columns of data grid view. I use a foreach loop, This loop will cause a problem. The problem is it won’t show all days in the columns because I want to show all days in other calendar. see the codes :

for (int i = 0; i < dtEnd.Subtract(dtStart).Days; i++)
        {
            TimeSpan counter = new TimeSpan(i, 0, 0, 0);

            string s1 = "10/9/2012";
            string s2 = "11/10/2012";
            d1 = Convert.ToDateTime(s1);
            d2 = Convert.ToDateTime(s2);

            foreach (DateTime item in GetDateRange(d1, d2))
            {
                s = item.ToShortDateString();
            }


            PersianCalendar p = new PersianCalendar();
            DateTime date = Convert.ToDateTime(s);
            int day = p.GetDayOfMonth(date);
            int month = p.GetMonth(date);
            int year = p.GetYear(date);
            string dt = string.Format("{0}/{1}/{2}", year, month, day);
            dataGridView1.Columns.Add(string.Format("col{0}", i), string.Format("{0} {1}", (dtStart + counter).DayOfWeek.ToString(), dt));


        }

It will show only one day because of that foreach loop. DayOfWeek is working perfectly but the problem is showing the days in foreach loop it will only show one day.

UPDATE

string dt only show one day it won’t show other days.

Answer 1

You can’t do that. because every time in the loop you are overriding the value. can you show the dates in a new row.

Try this :

for (int i = 0; i < dtEnd.Subtract(dtStart).Days; i++)
        {
            TimeSpan counter = new TimeSpan(i, 0, 0, 0);                                       
           dataGridView1.Columns.Add(string.Format("col{0}", i), string.Format("{0}", (dtStart + counter).DayOfWeek.ToString()));
        }

Then add new row for that :

 d1 = dtStart;
        d2 = dtEnd;
        foreach (DateTime item in GetDateRange(d1, d2))
        {
            int day = p.GetDayOfMonth(item);
            int month = p.GetMonth(item);
            int year = p.GetYear(item);
            string dt1 = string.Format("{0}/{1}/{2}", year, month, day);
            listBox1.Items.Add(dt1);

        }
        dataGridView1.Rows.Add();
        for (int i = 0; i < dataGridView1.Columns.Count; i++)
        {
            try
            {
                dataGridView1.Rows[0].Cells[i].Value = listBox1.Items[i];
            }
            catch (Exception)
            {

            }

        }