C # time function extension

function//This is the first few weeks of the year


private int DatePart (System.DateTime dt)
{
int weeknow = Convert.ToInt32 (dt. DayOfWeek);/What day of the week
int daydiff = ( -1) * (weeknow+1)//day difference between today and last weekend
int days = System.DateTime.Now.AddDays (Daydiff). dayofyear;//last weekend is the first day of the year
int weeks = DAYS/7;
if (days%7!= 0)
{
weeks++;
}
At this point, Weeks was last week for the first few weeks of the year.
return (WEEKS+1);
}


This week's start and start date

private string Weekrange (System.DateTime dt)
{
int weeknow = Convert.ToInt32 (dt. DayOfWeek);
int daydiff = ( -1) * WEEKNOW;
int dayadd = 6-weeknow;
String datebegin = System.DateTime.Now.AddDays (Daydiff). Date.tostring ("MM month DD day");
String dateend = System.DateTime.Now.AddDays (Dayadd). Date.tostring ("MM month DD day");
return Datebegin + "-" +dateend;
}