private void SetRange(DateTime min, DateTime max) {
if (IsHandleCreated) {
int flags = 0;
NativeMethods.SYSTEMTIMEARRAY sa = new NativeMethods.SYSTEMTIMEARRAY();
flags |= NativeMethods.GDTR_MIN | NativeMethods.GDTR_MAX;
NativeMethods.SYSTEMTIME sys = DateTimePicker.DateTimeToSysTime(min);
sa.wYear1 = sys.wYear;
sa.wMonth1 = sys.wMonth;
sa.wDayOfWeek1 = sys.wDayOfWeek;
sa.wDay1 = sys.wDay;
sa.wHour1 = sys.wHour;
sa.wMinute1 = sys.wMinute;
sa.wSecond1 = sys.wSecond;
sa.wMilliseconds1 = sys.wMilliseconds;
sys = DateTimePicker.DateTimeToSysTime(max);
sa.wYear2 = sys.wYear;
sa.wMonth2 = sys.wMonth;
sa.wDayOfWeek2 = sys.wDayOfWeek;
sa.wDay2 = sys.wDay;
sa.wHour2 = sys.wHour;
sa.wMinute2 = sys.wMinute;
sa.wSecond2 = sys.wSecond;
sa.wMilliseconds2 = sys.wMilliseconds;
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.DTM_SETRANGE, flags, sa);
}
}
private void SetRange(DateTime minDate, DateTime maxDate) {
// Keep selection range within passed in minDate and maxDate
if (selectionStart < minDate) {
selectionStart = minDate;
}
if (selectionStart > maxDate) {
selectionStart = maxDate;
}
if (selectionEnd < minDate) {
selectionEnd = minDate;
}
if (selectionEnd > maxDate) {
selectionEnd = maxDate;
}
SetSelRange(selectionStart, selectionEnd);
// Updated the calendar range
//
if (IsHandleCreated) {
int flag = 0;
NativeMethods.SYSTEMTIMEARRAY sa = new NativeMethods.SYSTEMTIMEARRAY();
flag |= NativeMethods.GDTR_MIN | NativeMethods.GDTR_MAX;
NativeMethods.SYSTEMTIME sys = DateTimePicker.DateTimeToSysTime(minDate);
sa.wYear1 = sys.wYear;
sa.wMonth1 = sys.wMonth;
sa.wDayOfWeek1 = sys.wDayOfWeek;
sa.wDay1 = sys.wDay;
sys = DateTimePicker.DateTimeToSysTime(maxDate);
sa.wYear2 = sys.wYear;
sa.wMonth2 = sys.wMonth;
sa.wDayOfWeek2 = sys.wDayOfWeek;
sa.wDay2 = sys.wDay;
if ((int)UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.MCM_SETRANGE, flag, sa) == 0)
throw new InvalidOperationException(SR.GetString(SR.MonthCalendarRange, minDate.ToShortDateString(), maxDate.ToShortDateString()));
}
}
/// <include file='doc\MonthCalendar.uex' path='docs/doc[@for="MonthCalendar.SetSelRange"]/*' />
/// <devdoc>
/// Upper must be greater than Lower
/// </devdoc>
/// <internalonly/>
private void SetSelRange(DateTime lower, DateTime upper) {
Debug.Assert(lower.Ticks <= upper.Ticks, "lower must be less than upper");
bool changed = false;
if (selectionStart != lower || selectionEnd != upper) {
changed = true;
selectionStart = lower;
selectionEnd = upper;
}
// always set the value on the control, to ensure that
// it is up to date.
//
if (IsHandleCreated) {
NativeMethods.SYSTEMTIMEARRAY sa = new NativeMethods.SYSTEMTIMEARRAY();
NativeMethods.SYSTEMTIME sys = DateTimePicker.DateTimeToSysTime(lower);
sa.wYear1 = sys.wYear;
sa.wMonth1 = sys.wMonth;
sa.wDayOfWeek1 = sys.wDayOfWeek;
sa.wDay1 = sys.wDay;
sys = DateTimePicker.DateTimeToSysTime(upper);
sa.wYear2 = sys.wYear;
sa.wMonth2 = sys.wMonth;
sa.wDayOfWeek2 = sys.wDayOfWeek;
sa.wDay2 = sys.wDay;
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.MCM_SETSELRANGE , 0, sa);
}
if (changed) {
OnDateChanged(new DateRangeEventArgs(lower, upper));
}
}
/// <include file='doc\MonthCalendar.uex' path='docs/doc[@for="MonthCalendar.GetMonthRange"]/*' />
/// <devdoc>
/// </devdoc>
/// <internalonly/>
private SelectionRange GetMonthRange(int flag) {
NativeMethods.SYSTEMTIMEARRAY sa = new NativeMethods.SYSTEMTIMEARRAY();
SelectionRange range = new SelectionRange();
UnsafeNativeMethods.SendMessage(new HandleRef(this, Handle), NativeMethods.MCM_GETMONTHRANGE, flag, sa);
NativeMethods.SYSTEMTIME st = new NativeMethods.SYSTEMTIME();
st.wYear = sa.wYear1;
st.wMonth = sa.wMonth1;
st.wDayOfWeek = sa.wDayOfWeek1;
st.wDay = sa.wDay1;
range.Start = DateTimePicker.SysTimeToDateTime(st);
st.wYear = sa.wYear2;
st.wMonth = sa.wMonth2;
st.wDayOfWeek = sa.wDayOfWeek2;
st.wDay = sa.wDay2;
range.End = DateTimePicker.SysTimeToDateTime(st);
return range;
}
