Hi:
Does anyone have a WeekOfMonth function they are willing to share?

That works with EWB of course.

Out of curiosity, what would you consider the week of a month?
What I mean is, would you start from the 1st no matter what day fo the week it was, or would you start from the first Sunday/Monday?

Something like this?

function getWeekOfMonth:Integer;
var
 iStart,iEnd,iYear,iMonth,iLoop: Integer;
 startDate: DateTime;
 iWeekCount:integer;
begin
 // Parametise the function for other year/month settings.
 iYear:=YearOf(Date);
 iMonth:=MonthOf(Date);
 // Get the first of month date.
 startDate:=EncodeDate(iYear,iMonth,1);
 // Get the day of the week for the 1st of the month.
 iStart:=WeekDayOf(startDate);
 // Get the current day of the month.
 iEnd:=DayOf(Date);                              
 // We start in week 1 always.
 iWeekCount:=1;
 for iLoop:=iStart to iEnd do
 begin
    // Inc week count if you pass through a sunday.
    // Days of week are 1 (monday) to 7 (sunday).
    if iLoop mod 8 = 0 then Inc(iWeekCount);
 end;
 Result:=iWeekCount;
end;

Not used in battle - I just wrote that to get over writer's block ...
I'm sure there's a more elegant, mathematical way to work it out.

Thanks. I will check it in a few minutes.

Using this month, Sep-2015 as an example, there are 5 weeks, with the week starting on a Sunday as it is for a Calendar grid.

Sorry that code was wrong. This works better i think :

function getWeekOfMonth:Integer;
var
 iYear,iMonth,iDay : Integer;
 iDayOfWeek,iRequiredDay : Integer;
 iWeekCount : integer;
 startDate : DateTime;
begin
 // Parametise the function for other year/moth settings.
 iYear:=YearOf(Date);
 iMonth:=MonthOf(Date);
 iDay:=1;
 // Get the first of month date.
 startDate:=EncodeDate(iYear,iMonth,iDay);
 // Get the day of the week for the 1st of the month.
 iDayOfWeek:=WeekDayOf(startDate);
 // Get the current day of the month.
 iRequiredDay:=DayOf(Date);
 // We start in week 1 always.
 iWeekCount:=1;
 while iDay < iRequiredDay do
 begin
   Inc(iDay);
   Inc(iDayOfWeek);
   if iDayOfWeek mod 7 = 0 then Inc(iWeekCount);
 end;
 Result:=iWeekCount;
end;

That did not work. Here is code I got to work. Working with last day of week instead.


function getWeekOfMonth(DateValue: Datetime) :Integer;
var
 iStart,iEnd,iYear,iMonth: Integer;
 startDate: DateTime;
 iWeekCount:integer;
 iLastDayOfWeek: integer;
 iFirstLastWeekday: integer;
 iFullWeeks, iEndDay: integer;

begin
 // Parametise the function for other year/month settings.
 iYear := YearOf(DateValue);
 iMonth := MonthOf(DateValue);

 // Set last day of week 1=Monday...7=Sunday
 iLastDayOfWeek := 6;

 // Get the first of month date.
 startDate := EncodeDate(iYear,iMonth,1);

 // Get the day of the week for the 1st of the month.
 iStart := WeekDayOf(startDate);

 // Get the current day of the month.
 iEnd := DayOf(DateValue);
 
 // Get the day of the end date
 iEndDay := WeekDayOf(DateValue);

 // We start in week 1 always.
 iWeekCount := 1;

 // get first iFirstLastWeekday
 iFirstLastWeekday := iLastDayOfWeek - iStart + 1;
 
 // get Full Weeks until iEnd
   if iEnd < iFirstLastWeekday then
     iFullWeeks := 0
   else
     iFullWeeks := (iEnd - iFirstLastWeekday) div 7;

 // week count
 iWeekCount := iWeekCount + iFullWeeks;
                                 
 // if week does not end on iLastDayOfWeek
 if iFullWeeks > 0 then
 begin
   if iEndDay <> iLastDayOfWeek then
     Inc(iWeekCount);
 end
 else
 begin
   if iEnd > iFirstLastWeekday then
     Inc(iWeekCount);
 end;

 result := iWeekCount;
end;

Glad you've got a working function.

It's hardly important, but if you have a spare minute I'm curious about what didn't work on mine (the second code, not the first one)? I just ran it for a whole month and each day was in what I thought was the correct week.

Cheers,

<< It's hardly important, but if you have a spare minute I'm curious about what didn't work on mine (the second code, not the first one)? I just ran it for a whole month and each day was in what I thought was the correct week.
>>>

No matter the date, it returned '3'.