| public abstract AddMonths ( DateTime time, int months ) : DateTime | ||
| time | DateTime | |
| months | int | |
| return | DateTime | |
//Creates a title block. No customization is offered, if that's needed then specify the header template.
Control CreateStaticTitle(DateTime visibleDate, System.Globalization.Calendar threadCalendar)
{
//Create a new table for the header controls
Table titleTable = new Table();
titleTable.GridLines = GridLines.None;
titleTable.Width = Unit.Percentage(100);
titleTable.CellSpacing = 0;
TableRow titleTableRow = new TableRow();
titleTable.Rows.Add(titleTableRow);
TableCell PrevCell = new TableCell();
titleTableRow.Cells.Add(PrevCell);
PrevCell.ApplyStyle(nextPrevStyle);
Button PrevBtn = new Button();
PrevBtn.CssClass = "buttonlink";
PrevBtn.Text = "< " + threadCalendar.AddMonths(visibleDate, -1).ToString("MMMM");
PrevBtn.CommandName = COMMAND_PREVMONTH;
PrevCell.Controls.Add(PrevBtn);
TableCell MonthCell = new TableCell();
titleTableRow.Cells.Add(MonthCell);
MonthCell.ApplyStyle(titleStyle);
MonthCell.Text = visibleDate.ToString("MMMM yyyy");
TableCell NextCell = new TableCell();
titleTableRow.Cells.Add(NextCell);
NextCell.ApplyStyle(nextPrevStyle);
Button NextBtn = new Button();
NextBtn.CssClass = "buttonlink";
NextBtn.Text = threadCalendar.AddMonths(visibleDate, +1).ToString("MMMM") + " >";
NextBtn.CommandName = COMMAND_NEXTMONTH;
NextCell.Controls.Add(NextBtn);
return(titleTable);
}
private void MonthListEventHandler(Object source, ListCommandEventArgs e)
{
_threadCalendar = DateTimeFormatInfo.CurrentInfo.Calendar;
if (e.ListItem.Index == _monthsToDisplay)
{
// Next was selected
Control.VisibleDate = _threadCalendar.AddMonths(
Control.VisibleDate, _monthsToDisplay);
SecondaryUIMode = ChooseMonth;
}
else if (e.ListItem.Index == _monthsToDisplay + 1)
{
// Prev was selected
Control.VisibleDate = _threadCalendar.AddMonths(
Control.VisibleDate, -_monthsToDisplay);
SecondaryUIMode = ChooseMonth;
}
else
{
// A month was selected
Control.VisibleDate = _threadCalendar.AddMonths(
Control.VisibleDate,
e.ListItem.Index);
if (_chooseOption == MonthOption)
{
// Add the whole month to the date list
DateTime beginDate = EffectiveVisibleDate(Control.VisibleDate);
Control.VisibleDate = beginDate;
DateTime endDate = _threadCalendar.AddMonths(beginDate, 1);
endDate = _threadCalendar.AddDays(endDate, -1);
SelectRange(beginDate, endDate);
HandlePostBackEvent(Done.ToString(CultureInfo.InvariantCulture));
}
else
{
SecondaryUIMode = ChooseWeek;
}
}
}
public static DateTime?AddMonths(DateTime time, int months)
{
try
{
return(cal.AddMonths(time, months));
}
catch (System.ArgumentException)
{
return(null);
}
}
public static DateTime?AddMonths(DateTime time, int months)
{
try
{
return(Cal.AddMonths(time, months));
}
catch (ArgumentException)
{
return(new DateTime?());
}
}
private void SetMonthModeNextButton(DateTime firstDayOfMonth)
{
if (Owner != null && NextButton != null)
{
// DisplayDate is equal to DateTime.MaxValue
if (DateTimeHelper.CompareYearMonth(firstDayOfMonth, DateTime.MaxValue) == 0)
{
NextButton.IsEnabled = false;
}
else
{
// Since we are sure DisplayDate is not equal to
// DateTime.MaxValue, it is safe to use AddMonths
DateTime firstDayOfNextMonth = _calendar.AddMonths(firstDayOfMonth, 1);
NextButton.IsEnabled = (DateTimeHelper.CompareDays(Owner.DisplayDateRangeEnd, firstDayOfNextMonth) > -1);
}
}
}
private void SetMonthModeNextButton()
{
if (this.Owner != null && _nextButton != null)
{
DateTime firstDayOfMonth = DateTimeHelper.DiscardDayTime(DisplayDate);
// DisplayDate is equal to DateTime.MaxValue
if (DateTimeHelper.CompareYearMonth(firstDayOfMonth, DateTime.MaxValue) == 0)
{
_nextButton.IsEnabled = false;
}
else
{
// Since we are sure DisplayDate is not equal to DateTime.MaxValue,
// it is safe to use AddMonths
DateTime firstDayOfNextMonth = _calendar.AddMonths(firstDayOfMonth, 1);
_nextButton.IsEnabled = (DateTimeHelper.CompareDays(this.Owner.DisplayDateEndInternal, firstDayOfNextMonth) > -1);
}
}
}
private void MonthListEventHandler(Object source, ListCommandEventArgs e)
{
_threadCalendar = DateTimeFormatInfo.CurrentInfo.Calendar;
if (e.ListItem.Index == _monthsToDisplay)
{
// Next was selected
Control.VisibleDate = _threadCalendar.AddMonths(
Control.VisibleDate, _monthsToDisplay);
SecondaryUIMode = ChooseMonth;
}
else if (e.ListItem.Index == _monthsToDisplay + 1)
{
// Prev was selected
Control.VisibleDate = _threadCalendar.AddMonths(
Control.VisibleDate, -_monthsToDisplay);
SecondaryUIMode = ChooseMonth;
}
else
{
// A month was selected
Control.VisibleDate = _threadCalendar.AddMonths(
Control.VisibleDate,
e.ListItem.Index);
if (_chooseOption == MonthOption)
{
// Add the whole month to the date list
DateTime beginDate = EffectiveVisibleDate(Control.VisibleDate);
Control.VisibleDate = beginDate;
DateTime endDate = _threadCalendar.AddMonths(beginDate, 1);
endDate = _threadCalendar.AddDays(endDate, -1);
SelectRange(beginDate, endDate);
HandlePostBackEvent(Done.ToString(CultureInfo.InvariantCulture));
}
else
{
SecondaryUIMode = ChooseWeek;
}
}
}
/// <include file='doc\ChtmlCalendarAdapter.uex' path='docs/doc[@for="ChtmlCalendarAdapter.Render"]/*' />
public override void Render(HtmlMobileTextWriter writer)
{
ArrayList arr;
DateTime tempDate;
DateTimeFormatInfo currentDateTimeInfo = DateTimeFormatInfo.CurrentInfo;
String abbreviatedMonthDayPattern = AbbreviateMonthPattern(currentDateTimeInfo.MonthDayPattern);
_threadCalendar = currentDateTimeInfo.Calendar;
bool breakAfter = false;
writer.EnterStyle(Style);
Debug.Assert(NotSecondaryUI == NotSecondaryUIInit);
switch (SecondaryUIMode)
{
case FirstPrompt:
String promptText = Control.CalendarEntryText;
if (String.IsNullOrEmpty(promptText))
{
promptText = SR.GetString(SR.CalendarAdapterFirstPrompt);
}
// Link to input option selection screen
RenderPostBackEventAsAnchor(writer,
OptionPrompt.ToString(CultureInfo.InvariantCulture),
promptText);
// We should honor BreakAfter property here as the first
// UI is shown with other controls on the same form.
// For other secondary UI, it is not necessary.
if (Control.BreakAfter)
{
breakAfter = true;
}
break;
// Render the first secondary page that provides differnt
// options to select a date.
case OptionPrompt:
writer.Write(SR.GetString(SR.CalendarAdapterOptionPrompt));
writer.WriteBreak();
arr = new ArrayList();
// Option to select the default date
arr.Add(Control.VisibleDate.ToString(
currentDateTimeInfo.ShortDatePattern, CultureInfo.CurrentCulture));
// Option to another page that can enter a date by typing
arr.Add(SR.GetString(SR.CalendarAdapterOptionType));
// Options to a set of pages for selecting a date, a week
// or a month by picking month/year, week and day
// accordingly. Available options are determined by
// SelectionMode.
arr.Add(SR.GetString(SR.CalendarAdapterOptionChooseDate));
if (Control.SelectionMode == CalendarSelectionMode.DayWeek ||
Control.SelectionMode == CalendarSelectionMode.DayWeekMonth)
{
arr.Add(SR.GetString(SR.CalendarAdapterOptionChooseWeek));
if (Control.SelectionMode == CalendarSelectionMode.DayWeekMonth)
{
arr.Add(SR.GetString(SR.CalendarAdapterOptionChooseMonth));
}
}
DataBindAndRender(writer, _optionList, arr);
break;
// Render a title and textbox to capture a date entered by user
case TypeDate:
if (_textBoxErrorMessage != null)
{
writer.Write(_textBoxErrorMessage);
writer.WriteBreak();
}
if (_selectList.Visible)
{
writer.Write(SR.GetString(SR.CalendarAdapterOptionEra));
writer.WriteBreak();
_selectList.RenderControl(writer);
}
String numericDateFormat = GetNumericDateFormat();
writer.Write(SR.GetString(SR.CalendarAdapterOptionType));
writer.Write(":");
writer.WriteBreak();
writer.Write("(");
writer.Write(numericDateFormat.ToUpper(CultureInfo.InvariantCulture));
writer.Write(")");
if (!_selectList.Visible)
{
writer.Write(GetEra(Control.VisibleDate));
}
writer.WriteBreak();
_textBox.Numeric = true;
_textBox.Size = numericDateFormat.Length;
_textBox.MaxLength = numericDateFormat.Length;
_textBox.Text = Control.VisibleDate.ToString(numericDateFormat, CultureInfo.InvariantCulture);
_textBox.Visible = true;
_textBox.RenderControl(writer);
// Command button for sending the textbox value back to the server
_command.Text = GetDefaultLabel(OKLabel);
_command.Visible = true;
_command.RenderControl(writer);
break;
// Render a paged list for choosing a month
case ChooseMonth:
writer.Write(SR.GetString(SR.CalendarAdapterOptionChooseMonth));
writer.Write(":");
writer.WriteBreak();
tempDate = Control.VisibleDate;
String abbreviatedYearMonthPattern = AbbreviateMonthPattern(currentDateTimeInfo.YearMonthPattern);
// This is to be consistent with ASP.NET Calendar control
// on handling YearMonthPattern:
// Some cultures have a comma in their YearMonthPattern,
// which does not look right in a calendar. Here we
// strip the comma off.
int indexComma = abbreviatedYearMonthPattern.IndexOf(',');
if (indexComma >= 0)
{
abbreviatedYearMonthPattern =
abbreviatedYearMonthPattern.Remove(indexComma, 1);
}
arr = new ArrayList();
for (int i = 0; i < _monthsToDisplay; i++)
{
arr.Add(tempDate.ToString(abbreviatedYearMonthPattern, CultureInfo.CurrentCulture));
tempDate = _threadCalendar.AddMonths(tempDate, 1);
}
arr.Add(GetDefaultLabel(NextLabel));
arr.Add(GetDefaultLabel(PreviousLabel));
DataBindAndRender(writer, _monthList, arr);
break;
// Based on the month selected in case ChooseMonth above, render a list of
// availabe weeks of the month.
case ChooseWeek:
String monthFormat = (GetNumericDateFormat()[0] == 'y') ? "yyyy/M" : "M/yyyy";
writer.Write(SR.GetString(SR.CalendarAdapterOptionChooseWeek));
writer.Write(" (");
writer.Write(Control.VisibleDate.ToString(monthFormat, CultureInfo.CurrentCulture));
writer.Write("):");
writer.WriteBreak();
// List weeks of days of the selected month. May include
// days from the previous and the next month to fill out
// all six week choices. This is consistent with the
// ASP.NET Calendar control.
// Note that the event handling code of this list control
// should be implemented according to the index content
// generated here.
tempDate = FirstCalendarDay(Control.VisibleDate);
arr = new ArrayList();
String weekDisplay;
for (int i = 0; i < 6; i++)
{
weekDisplay = tempDate.ToString(abbreviatedMonthDayPattern, CultureInfo.CurrentCulture);
weekDisplay += DaySeparator;
tempDate = _threadCalendar.AddDays(tempDate, 6);
weekDisplay += tempDate.ToString(abbreviatedMonthDayPattern, CultureInfo.CurrentCulture);
arr.Add(weekDisplay);
tempDate = _threadCalendar.AddDays(tempDate, 1);
}
DataBindAndRender(writer, _weekList, arr);
break;
// Based on the month and week selected in case ChooseMonth and ChooseWeek above,
// render a list of the dates in the week.
case ChooseDay:
writer.Write(SR.GetString(SR.CalendarAdapterOptionChooseDate));
writer.Write(":");
writer.WriteBreak();
tempDate = Control.VisibleDate;
arr = new ArrayList();
String date;
String dayName;
StringBuilder dayDisplay = new StringBuilder();
bool dayNameFirst = (GetNumericDateFormat()[0] != 'y');
for (int i = 0; i < 7; i++)
{
date = tempDate.ToString(abbreviatedMonthDayPattern, CultureInfo.CurrentCulture);
if (Control.ShowDayHeader)
{
// Use the short format for displaying day name
dayName = GetAbbreviatedDayName(tempDate);
dayDisplay.Length = 0;
if (dayNameFirst)
{
dayDisplay.Append(dayName);
dayDisplay.Append(Space);
dayDisplay.Append(date);
}
else
{
dayDisplay.Append(date);
dayDisplay.Append(Space);
dayDisplay.Append(dayName);
}
arr.Add(dayDisplay.ToString());
}
else
{
arr.Add(date);
}
tempDate = _threadCalendar.AddDays(tempDate, 1);
}
DataBindAndRender(writer, _dayList, arr);
break;
default:
Debug.Assert(false, "Unexpected Secondary UI Mode");
break;
}
writer.ExitStyle(Style, breakAfter);
}
/// <include file='doc\ChtmlCalendarAdapter.uex' path='docs/doc[@for="ChtmlCalendarAdapter.Render"]/*' />
public override void Render(HtmlMobileTextWriter writer)
{
ArrayList arr;
DateTime tempDate;
DateTimeFormatInfo currentDateTimeInfo = DateTimeFormatInfo.CurrentInfo;
String abbreviatedMonthDayPattern = AbbreviateMonthPattern(currentDateTimeInfo.MonthDayPattern);
_threadCalendar = currentDateTimeInfo.Calendar;
bool breakAfter = false;
writer.EnterStyle(Style);
Debug.Assert(NotSecondaryUI == NotSecondaryUIInit);
switch (SecondaryUIMode)
{
case FirstPrompt:
String promptText = Control.CalendarEntryText;
if (String.IsNullOrEmpty(promptText))
{
promptText = SR.GetString(SR.CalendarAdapterFirstPrompt);
}
// Link to input option selection screen
RenderPostBackEventAsAnchor(writer,
OptionPrompt.ToString(CultureInfo.InvariantCulture),
promptText);
// We should honor BreakAfter property here as the first
// UI is shown with other controls on the same form.
// For other secondary UI, it is not necessary.
if (Control.BreakAfter)
{
breakAfter = true;
}
break;
// Render the first secondary page that provides differnt
// options to select a date.
case OptionPrompt:
writer.Write(SR.GetString(SR.CalendarAdapterOptionPrompt));
writer.WriteBreak();
arr = new ArrayList();
// Option to select the default date
arr.Add(Control.VisibleDate.ToString(
currentDateTimeInfo.ShortDatePattern, CultureInfo.CurrentCulture));
// Option to another page that can enter a date by typing
arr.Add(SR.GetString(SR.CalendarAdapterOptionType));
// Options to a set of pages for selecting a date, a week
// or a month by picking month/year, week and day
// accordingly. Available options are determined by
// SelectionMode.
arr.Add(SR.GetString(SR.CalendarAdapterOptionChooseDate));
if (Control.SelectionMode == CalendarSelectionMode.DayWeek ||
Control.SelectionMode == CalendarSelectionMode.DayWeekMonth)
{
arr.Add(SR.GetString(SR.CalendarAdapterOptionChooseWeek));
if (Control.SelectionMode == CalendarSelectionMode.DayWeekMonth)
{
arr.Add(SR.GetString(SR.CalendarAdapterOptionChooseMonth));
}
}
DataBindAndRender(writer, _optionList, arr);
break;
// Render a title and textbox to capture a date entered by user
case TypeDate:
if (_textBoxErrorMessage != null)
{
writer.Write(_textBoxErrorMessage);
writer.WriteBreak();
}
if (_selectList.Visible)
{
writer.Write(SR.GetString(SR.CalendarAdapterOptionEra));
writer.WriteBreak();
_selectList.RenderControl(writer);
}
String numericDateFormat = GetNumericDateFormat();
writer.Write(SR.GetString(SR.CalendarAdapterOptionType));
writer.Write(":");
writer.WriteBreak();
writer.Write("(");
writer.Write(numericDateFormat.ToUpper(CultureInfo.InvariantCulture));
writer.Write(")");
if (!_selectList.Visible)
{
writer.Write(GetEra(Control.VisibleDate));
}
writer.WriteBreak();
_textBox.Numeric = true;
_textBox.Size = numericDateFormat.Length;
_textBox.MaxLength = numericDateFormat.Length;
_textBox.Text = Control.VisibleDate.ToString(numericDateFormat, CultureInfo.InvariantCulture);
_textBox.Visible = true;
_textBox.RenderControl(writer);
// Command button for sending the textbox value back to the server
_command.Text = GetDefaultLabel(OKLabel);
_command.Visible = true;
_command.RenderControl(writer);
break;
// Render a paged list for choosing a month
case ChooseMonth:
writer.Write(SR.GetString(SR.CalendarAdapterOptionChooseMonth));
writer.Write(":");
writer.WriteBreak();
tempDate = Control.VisibleDate;
String abbreviatedYearMonthPattern = AbbreviateMonthPattern(currentDateTimeInfo.YearMonthPattern);
// This is to be consistent with ASP.NET Calendar control
// on handling YearMonthPattern:
// Some cultures have a comma in their YearMonthPattern,
// which does not look right in a calendar. Here we
// strip the comma off.
int indexComma = abbreviatedYearMonthPattern.IndexOf(',');
if (indexComma >= 0)
{
abbreviatedYearMonthPattern =
abbreviatedYearMonthPattern.Remove(indexComma, 1);
}
arr = new ArrayList();
for (int i = 0; i < _monthsToDisplay; i++)
{
arr.Add(tempDate.ToString(abbreviatedYearMonthPattern, CultureInfo.CurrentCulture));
tempDate = _threadCalendar.AddMonths(tempDate, 1);
}
arr.Add(GetDefaultLabel(NextLabel));
arr.Add(GetDefaultLabel(PreviousLabel));
DataBindAndRender(writer, _monthList, arr);
break;
// Based on the month selected in case ChooseMonth above, render a list of
// availabe weeks of the month.
case ChooseWeek:
String monthFormat = (GetNumericDateFormat()[0] == 'y') ? "yyyy/M" : "M/yyyy";
writer.Write(SR.GetString(SR.CalendarAdapterOptionChooseWeek));
writer.Write(" (");
writer.Write(Control.VisibleDate.ToString(monthFormat, CultureInfo.CurrentCulture));
writer.Write("):");
writer.WriteBreak();
// List weeks of days of the selected month. May include
// days from the previous and the next month to fill out
// all six week choices. This is consistent with the
// ASP.NET Calendar control.
// Note that the event handling code of this list control
// should be implemented according to the index content
// generated here.
tempDate = FirstCalendarDay(Control.VisibleDate);
arr = new ArrayList();
String weekDisplay;
for (int i = 0; i < 6; i++)
{
weekDisplay = tempDate.ToString(abbreviatedMonthDayPattern, CultureInfo.CurrentCulture);
weekDisplay += DaySeparator;
tempDate = _threadCalendar.AddDays(tempDate, 6);
weekDisplay += tempDate.ToString(abbreviatedMonthDayPattern, CultureInfo.CurrentCulture);
arr.Add(weekDisplay);
tempDate = _threadCalendar.AddDays(tempDate, 1);
}
DataBindAndRender(writer, _weekList, arr);
break;
// Based on the month and week selected in case ChooseMonth and ChooseWeek above,
// render a list of the dates in the week.
case ChooseDay:
writer.Write(SR.GetString(SR.CalendarAdapterOptionChooseDate));
writer.Write(":");
writer.WriteBreak();
tempDate = Control.VisibleDate;
arr = new ArrayList();
String date;
String dayName;
StringBuilder dayDisplay = new StringBuilder();
bool dayNameFirst = (GetNumericDateFormat()[0] != 'y');
for (int i = 0; i < 7; i++)
{
date = tempDate.ToString(abbreviatedMonthDayPattern, CultureInfo.CurrentCulture);
if (Control.ShowDayHeader)
{
// Use the short format for displaying day name
dayName = GetAbbreviatedDayName(tempDate);
dayDisplay.Length = 0;
if (dayNameFirst)
{
dayDisplay.Append(dayName);
dayDisplay.Append(Space);
dayDisplay.Append(date);
}
else
{
dayDisplay.Append(date);
dayDisplay.Append(Space);
dayDisplay.Append(dayName);
}
arr.Add(dayDisplay.ToString());
}
else
{
arr.Add(date);
}
tempDate = _threadCalendar.AddDays(tempDate, 1);
}
DataBindAndRender(writer, _dayList, arr);
break;
default:
Debug.Assert(false, "Unexpected Secondary UI Mode");
break;
}
writer.ExitStyle(Style, breakAfter);
}
private static IEnumerable<DateTime> GetOccurrences(DateInterval interval, DatePeriod period, Calendar calendar, DateTime start, DateTime end, bool skipWeekends = true)
{
var difference = DateSpan.GetDifference(interval, start, end)/period.Quantifier;
if (start.Kind == DateTimeKind.Utc)
{
start = start.ToLocalTime();
}
for (var i = 0; i < difference; i++)
{
switch (period.Frequency)
{
case DatePeriodFrequency.Seconds:
var seconds = calendar.AddSeconds(start, period.Quantifier * i);
yield return DeferOccurrenceFallingOnWeekend(calendar, seconds, skipWeekends);
break;
case DatePeriodFrequency.Minutes:
var minutes = calendar.AddMinutes(start, period.Quantifier * i);
yield return DeferOccurrenceFallingOnWeekend(calendar, minutes, skipWeekends);
break;
case DatePeriodFrequency.Hours:
var hours = calendar.AddHours(start, period.Quantifier * i);
yield return DeferOccurrenceFallingOnWeekend(calendar, hours, skipWeekends);
break;
case DatePeriodFrequency.Days:
var days = calendar.AddDays(start, period.Quantifier*i);
yield return DeferOccurrenceFallingOnWeekend(calendar, days, skipWeekends);
break;
case DatePeriodFrequency.Weeks:
var weeks = calendar.AddWeeks(start, period.Quantifier*i);
yield return DeferOccurrenceFallingOnWeekend(calendar, weeks, skipWeekends);
break;
case DatePeriodFrequency.Months:
var months = calendar.AddMonths(start, period.Quantifier*i);
yield return DeferOccurrenceFallingOnWeekend(calendar, months, skipWeekends);
break;
case DatePeriodFrequency.Years:
var years = calendar.AddYears(start, period.Quantifier*i);
yield return DeferOccurrenceFallingOnWeekend(calendar, years, skipWeekends);
break;
default:
throw new ArgumentException("Frequency");
}
}
}
public void UpdateMonthMode()
{
Debug.Assert(this._owner.DisplayDate != null);
_currentMonth = (DateTime)this._owner.DisplayDate;
_firstDayOfWeek = this._owner.FirstDayOfWeek;
if (_currentMonth != null)
{
int year = _calendar.GetYear(_currentMonth);
int month = _calendar.GetMonth(_currentMonth);
DateTime firstDayOfMonth = new DateTime(year, month, 1);
if (this._headerButton != null)
{
this._headerButton.Content = string.Format(CultureInfo.CurrentCulture, Resource.Calendar_MonthViewHeaderText,
CultureInfo.CurrentCulture.DateTimeFormat.MonthNames[month - 1],
year.ToString(CultureInfo.CurrentCulture));
this._headerButton.IsEnabled = true;
}
int lastMonthToDisplay = PreviousMonthDays(firstDayOfMonth);
DateTime dateToAdd = _calendar.AddDays(firstDayOfMonth, -lastMonthToDisplay);
DateTime firstDayOfNextMonth = _calendar.AddMonths(firstDayOfMonth, 1);
// check to see if Prev/Next Buttons will be displayed
if (_previousButton != null)
{
if (DateTime.Compare(_owner.DisplayDateStart.GetValueOrDefault(DateTime.MinValue), firstDayOfMonth) > -1)
{
_previousButton.IsEnabled = false;
}
else
{
_previousButton.IsEnabled = true;
}
}
if (_nextButton != null)
{
if (DateTime.Compare(_owner.DisplayDateEnd.GetValueOrDefault(DateTime.MaxValue), firstDayOfNextMonth) < 0)
{
_nextButton.IsEnabled = false;
}
else
{
_nextButton.IsEnabled = true;
}
}
int count = 0;
if (_monthGrid != null)
{
Debug.Assert(_monthGrid.Children.Count == COLS * ROWS);
//Set the day titles
foreach (object child in _monthGrid.Children)
{
if (count < (COLS))
{
//this assumes that the day titles are always text blocks
TextBlock daytitle = child as TextBlock;
Debug.Assert(daytitle != null);
daytitle.Text = CultureInfo.CurrentCulture.DateTimeFormat.AbbreviatedDayNames[(count + (int)_firstDayOfWeek) % NUMBER_OF_DAYS_IN_WEEK];
}
else
{
DayButton mybutton = child as DayButton;
Debug.Assert(mybutton != null);
SetButtonState(mybutton, dateToAdd);
mybutton.IsTabStop = false;
if (_currentButton == null)
{
if (_owner.SelectedDate == null && mybutton.IsToday)
{
mybutton.IsTabStop = true;
_currentButton = mybutton;
mybutton.IsCurrent = true;
}
else
{
if (mybutton.IsSelected)
{
mybutton.IsTabStop = true;
_currentButton = mybutton;
mybutton.IsCurrent = true;
}
}
}
mybutton.Content = String.Format(CultureInfo.CurrentCulture, "{0,2}", dateToAdd.Day);
mybutton.DataContext = dateToAdd;
dateToAdd = _calendar.AddDays(dateToAdd, 1);
}
count++;
}
}
}
}
public static DateTime EndOfSemester( this DateTime date, Calendar calendar )
{
Arg.NotNull( calendar, nameof( calendar ) );
Contract.Ensures( calendar.GetYear( Contract.Result<DateTime>() ) == Contract.OldValue( calendar.GetYear( date ) ) );
Contract.Ensures( Contract.Result<DateTime>().Semester( calendar ) == Contract.OldValue( date.Semester( calendar ) ) );
return calendar.AddMonths( date.StartOfSemester( calendar ), 6 ).AddTicks( -1L );
}
public static DateTime StartOfSemester( this DateTime date, Calendar calendar )
{
Arg.NotNull( calendar, nameof( calendar ) );
Contract.Ensures( calendar.GetYear( Contract.Result<DateTime>() ) == Contract.OldValue( calendar.GetYear( date ) ) );
Contract.Ensures( Contract.Result<DateTime>().Semester( calendar ) == Contract.OldValue( date.Semester( calendar ) ) );
var semester = date.Semester( calendar );
return calendar.AddMonths( date.StartOfYear( calendar ), ( semester - 1 ) * 6 );
}
