[Solved] Can't set min date = 2011/08/10

[Grzegorz Żydek]

Hi,

I've got some problem with calendar.

If I try put into view that code:
@(Html.Telerik().Calendar().Name("Month3").MinDate(new DateTime(2011,8,10)))

I have got error:

Year, Month, and Day parameters describe an un-representable DateTime.

Any sugesstions?

Cheers, Grzesiek

[Grzegorz Żydek]

Hi,

I finally solved problem with calendar.

There is a bug in Calendar.cs in BuildMonthView function.

private IHtmlNode BuildMonthView(ICalendarHtmlBuilder renderer)

        {

            IHtmlNode monthTag = renderer.MonthTag();

 

            DateTime? focusedDate = this.DetermineFocusedDate();

            DateTime prevMonth = new DateTime(focusedDate.Value.Year, focusedDate.Value.Month, 1).AddDays(-1);

            int firstDayOfMonthView = DateTime.DaysInMonth(prevMonth.Year, prevMonth.Month) - ((int)(prevMonth).DayOfWeek) + (int)CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek;

 

            DateTime startDate = new DateTime(prevMonth.Year, prevMonth.Month, firstDayOfMonthView);

            for (int weekRow = 0; weekRow < 6; weekRow++)

            {

                IHtmlNode rowTag = renderer.RowTag();

 

                for (int day = 0; day < 7; day++)

                {

                    renderer.CellTag(startDate, Value, urlFormat, startDate.Month != focusedDate.Value.Month).AppendTo(rowTag);

                    startDate = startDate.AddDays(1);

                }

                monthTag.Children.Add(rowTag);

            }

            return monthTag;

        }

Problem occurs when you want to evaluate  'firstDayOfMonthView'

int firstDayOfMonthView = DateTime.DaysInMonth(prevMonth.Year, prevMonth.Month) - ((int)(prevMonth).DayOfWeek) + (int)CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek;

Everythink is fine when the first day of week is set to Sunday, but if you change to Monday (like in my example) you can get wrong day number.

For instance:
MinDate = 2011-08-01
First day of week set in CultureInfo is Monday

prevMonth = 2011-07-31, Days in prevMonth = 31,  Day of week for prevMonth = (Sunday)0,  First Day Of Week = (Monday)1

int firstDayOfMonthView = 31 - 0 + 1 = 32;

And that is wrong!

I solved this problem that way:

var dayOfWeekOfPrevMonth = ((int)(prevMonth).DayOfWeek);
if (dayOfWeekOfPrevMonth == 0) dayOfWeekOfPrevMonth = 7;
int firstDayOfMonthView = DateTime.DaysInMonth(prevMonth.Year, prevMonth.Month) - dayOfWeekOfPrevMonth + (int)CultureInfo.CurrentCulture.DateTimeFormat.FirstDayOfWeek;

Cheers, Grzesiek

[Georgi Krustev]

Hello Grzegorz,

This is a known issue, which I am glad to inform is already fixed. The fix will be included in the next official release of Telerik extensions for ASP.NET MVC. 

Regards,
Georgi Krustev
the Telerik team