display a calendar year with custom hyperlinks in asp.net mvc - asp.net-mvc

Question

I'm looking to create an MVC web page that displays the 12 months of the year in a calendar format. Inside each day in the month I will bold only the dates that have any activity (data from database). The dates with activity would also be hyperlinked to a route like /Activity/2008/12/25
i'm about to attempt to try the asp.net ajax control toolkit calendar control but was wondering if anyone else had any advice.

Answer 1

Rendering a calendar is not extremely complicated. By using DateTimeFormatInfo in System.Globalization and the DateTime all the necessary information can be retrieved:
DateTimeFormatInfo.CurrentInfo.FirstDayOfWeek
DateTimeFormatInfo.CurrentInfo.GetMonthName(month)
DateTimeFormatInfo.CurrentInfo.GetAbbreviatedDayName((DayOfWeek)dayNumber)
A month in the calendar can be rendered in a table:
_ _ _ 1 2 3 4
5 6 7 8 9 ...
To dermine the number of empty cells at the begining something like this can be used:
DateTime date = new DateTime(year, month, 1);
int emptyCells = ((int)date.DayOfWeek + 7
- (int)DateTimeFormatInfo.CurrentInfo.FirstDayOfWeek) % 7;
As there are maximum 31 days in a month and maximum 6 empty cells at begining, a month can be rendered on maximum Ceil(37 / 7) = 6 rows. So there are maximum 42 cells to render in a month, some of them will be empty.
A new row is inserted in the table each 7 (number of days in a week) cells.
int days = DateTime.DaysInMonth(year, month);
for (int i = 0; i != 42; i++)
{
if (i % 7 == 0) {
writer.WriteLine("<tr>");
if( i > 0 ) writer.WriteLine("</tr>");
}
if (i < emptyCells || i >= emptyCells + days) {
writer.WriteLine("<td class=\"cal-empty\"> </td>");
} else {
writer.WriteLine("<td class=\"cal-day\"\">" + date.Day + "</td>");
date = date.AddDays(1);
}
}
Also, simply add an additional link in the non-empty cells to the desired route when the dates are with activity.