Week number month & year from date value in textbox

Question

Hi everyone I am working on project and I need to get the week number month and year from a datetime value in the past by simply selecting a date in the past and setting textbox1 to be that date say  02/03/2013. I don't want to use datetime.now. Is it possible? Thanks in advance

Vulpes · Answer

The only point of difficulty is the week number. The following assumes that weeks begin on a Sunday and that 1st January falls in week 1. private void button1_Click(object sender EventArgs e) { DateTime dt; bool isValid = DateTime.TryParse(textBox1.Text out dt); if(!isValid) { MessageBox.Show(Not a valid date - please amend); textBox1.Focus(); return; } int year = dt.Year; int month = dt.Month; int dayInYear = dt.DayOfYear; DateTime startOfYear = new DateTime(year 1 1); int dayOfWeek = (int)startOfYear.DayOfWeek; int prevSunday = 1 - dayOfWeek; int week = (dayInYear - prevSunday)/7 + 1; MessageBox.Show(String.Format(Week {0} Month {1} Year {2} week month year)); }

Ali ahmad · Answer

thank you very much :-)

Marvin kakuru · Answer

Thanks Vulpes it worked like a charm. All the best