Time and CurrentDatetime in webservice

ara3n · 2010-04-13

It looks like the service tier in 2009 Sp1 is populating the TIme and CurrentDate based on GMT time and not based on local in C/Side.

In my example. Onrelease of Sales order the following code is run.

"Release Date" := Today;
"Release Time" := Time;

The problem is that from if you go and look at the order, it's released 5 hours in future. The client is on Eastern time zone.

I did a quick test webservice function and getcurrentdatetime

returnvalue := substrno('Current time is %1, date %1, Datetime%1',today,time,currentdatetime);

and it again returns future tune and datetime.

It looks like a bug.

I did see this thread
viewtopic.php?f=32&t=33833&hilit=date+time+webservice

but it's pre 2009 sp1.

kine · 2010-04-13

The answer is still same, NAV cannot know in which timezone the calling client is, thus the calling application is responsible to correct the time by timezone...

ara3n · 2010-04-13

this is c/side code. that is executed.

on release of sales order the code is executed. the client connected to webservice does not have access to the code.

If you for example have oninsert trigger of a table. Date time inserted, webservice will insert the GMT time

kine · 2010-04-13

Ok, does it mean that when you store 14:00 1.1.2010 into the field when running the code through webservice, you client using NAV will see "14:00 1.1.2010" instead "6:00 1.1.2010" (if the time zone is -8:00)?

ara3n · 2010-04-13

If TIME is executed on a service tier and lets say the time zone is -8. And it's 2 pm local time. TIME Returns 10 PM. If I login with nav client on the same time zone and look that the time field, it shows 10 pm.

TIME does not return local time, since this is a webservice, it returns GMT time.

same applies to datetime. it always returns GMT time.

I have to write the code differently. to something like this.

if isServicetier or "iswebservice" then
"Tme Inserted" := TIme - 8hr
else
"time Inserted" := time;

kine · 2010-04-13

Ok, I understand it. It is expected for datetime variable, but using timezone for TIME variable is nonsense, because it is missing the "date" part which could be correctly shifted... I have hit similar problem with XMLPort or somewhere else...

mboon75 · 2010-09-16

Hi,

I'm running into the same problem. Is this going to be fixed by Microsoft?
To my humble opinion this is a bug.

TIME and DATETIME should look to the Date and Time settings of the server where the App Tier is running.

Regards

mboon75 · 2010-09-21

This is how Microsoft Support advises to fix this. ](*,) (BTW, they are not going to do it themselves in tabel 5900, 5901 and all other places where the TIME function is used).

//This code write to time variable NAVTime current server time
IF ISSERVICETIER THEN
IF GUIALLOWED THEN BEGIN
//>>RTC execution
NavTime:=TIME;

END
ELSE BEGIN
//WEB execution
//get web app hours and minutes to text
txtTime:=FORMAT(TIME,4,2);
//take hours and minutes to separate texts
txtHours:=COPYSTR(txtTime,1,2);
txtMinutes:=COPYSTR(txtTime,3,2);
//convert or just copy time to one more time variable
EVALUATE(tmTimeUtc,txtTime);
//Convert time to UTC and get hours
txtHoursUTC:=COPYSTR(FORMAT(tmTimeUtc,0,9),1,2);

// convert hoursUT and hours to integer
EVALUATE(intHoursUTC,txtHoursUTC);
EVALUATE(intHours,txtHours);
// calculate difference between UTC and local time and add difference to web service time
intHours:=intHours+intHours-intHoursUTC;
//create local time based on UTC + time zone
EVALUATE(NavTime,FORMAT(intHours)+txtMinutes);

END
ELSE BEGIN
//>>CC execution
NAVTime:=Time;

I always had the assumption that we had the Middle Tier (Business Layer) to ensure all client execute the same code.

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