Its because the timezone is not stored in the date, so what would it send. It should just send the date or at least have an option to do so.
Regards Dale Fraser <http://learncf.com/> http://learncf.com <http://flexcf.com/> http://flexcf.com From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Josh McDonald Sent: Tuesday, 16 December 2008 4:38 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Flex dates and time zones. Seriously? AMF doesn't send timezone? Wow... We use SOAP, so all my problems simply come from the fact that Date doesn't include a timezone at all so everything is converted to local time when unmarshalling... On Tue, Dec 16, 2008 at 3:34 PM, Doug McCune <d...@dougmccune.com> wrote: It's not that Flash Player decides it wants to convert the Date to a different timezone. It's about what data Flash Player has about that Date. When a Date is sent over the wire, particularly when using AMF either with Blaze or CF or whatever, the date is sent as the Unix timestamp, which is the number of milliseconds since 1970. That keeps the data transfer very small and simple, all you need to send is a single Number, which only takes up 8 bytes. So then Flash Player gets this single number, which represents the number of milliseconds since 1970, and it has to figure out how to turn that into a formatted Date. But that means that if you have a date of Jan 1 2008 @ 12pm in California (Unix timestamp of 1199188800), that same timestamp gets shown as 9am in New York. Because Flash Player has no idea that that same Unix timestamp is meant to be formatted in California time, you end up showing different times (and potentially even different dates if the timezone difference extends across midnight). So like people have mentioned, in order to get the date to display the right way you have to send more data. This can either mean sending the timezone offset that is supposed to be used for display, which will then require some offset conversion on the clientside, or sending the Date as a String, which takes up more bytes than the simple Number and requires a simple String to Date conversion on the client. But using the normal Date object with AMF will only send the number of milliseconds since 1970, and that information alone is not enough if you want to show the same formatted time across all timezones. Doug On Mon, Dec 15, 2008 at 9:13 PM, Dale Fraser <d...@fraser.id.au> wrote: The problem is that somehow. If the server serving that date is in a different location to you, flash player says, well I wont show that date I just got from the database, I'll adjust it to your time. This is totally useless, so for example if Im logging actions in an audit, the date in those logs could look different from one user to another. Regards Dale Fraser http://learncf.com <http://learncf.com/> http://flexcf.com <http://flexcf.com/> From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Randy Martin Sent: Tuesday, 16 December 2008 3:52 PM To: flexcoders@yahoogroups.com Subject: RE: [flexcoders] Flex dates and time zones. I guess I really don't understand what the problem is here?? I have a smalldatetime (or a datetime) in a MSSQL database. I setup a value object in AS to have the date field as a Date object. I go get the date from ColdFusion using RemoteObject. The cfc sets up a CF "value object" with the date as a CF Date object. And, voila, the MSSQL datetime becomes an AS Date object. I don't have to convert anything to a string, or any other kind of object. So, what's the problem here??? ~randy From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Dale Fraser Sent: Monday, December 15, 2008 9:51 PM To: flexcoders@yahoogroups.com Subject: RE: [flexcoders] Flex dates and time zones. Why does Flex do this? If I get a date out of the db and want to deal with it as a date, surely this should be possible. How can the flash player determine it needs to change it to a different date. There must be some other option rather than converting to a string. Regards Dale Fraser http://learncf.com <http://learncf.com/> http://flexcf.com <http://flexcf.com/> From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Paul Kukiel Sent: Tuesday, 16 December 2008 1:46 PM To: flexcoders@yahoogroups.com Subject: Re: [flexcoders] Flex dates and time zones. Thanks Tracy, I knew I was going to get this answer. I already got this working with strings as a test sample looks like I have to convert the rest of the app. Surely others are feeling my pain with this issue. And Nate I look forward to seeing what you have come up with when its ready. Paul. On 15/12/2008, at 7:46 PM, Tracy Spratt wrote: Pass the date as a string. Tracy _____ From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of Paul Kukiel Sent: Monday, December 15, 2008 3:17 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Flex dates and time zones. I have a date in a server in Australia: 22/12/2008 12:00:00 AM I am using this label function for the grid to try and fix the time zone issue but my date always comes back to me as 21/12/2008 in the datagrid. I really just wan the exact date from the database regardless of where I am in the world. Any ideas? // Label Grid Date public static function labelGridDate(item:Object, column:DataGridColumn):String { var formatter:DateFormatter = new DateFormatter(); var myDate:Date = item[column.dataField]; formatter.formatString = "DD MMM YYYY"; var offsetMilliseconds:Number = item[column.dataField].getTimezoneOffset() * 60 * 1000; item[column.dataField].setTime(item[column.dataField].getTime() + offsetMilliseconds); return formatter.format(item[column.dataField]); } Paul. -- "Therefore, send not to know For whom the bell tolls. It tolls for thee." Like the cut of my jib? Check out my Flex blog! :: Josh 'G-Funk' McDonald :: 0437 221 380 :: j...@gfunk007.com :: http://flex.joshmcdonald.info/ :: http://twitter.com/sophistifunk
