[Lazarus] Conversion from TField.AsDateTime to string

[Leonardo M. Ramé]

On 2011-09-10 11:43:02 +0200, Michael Van Canneyt wrote:
> 
> 
> On Fri, 9 Sep 2011, Leonardo M. Ramé wrote:
> >
> >To convert the JSON string to TDateTime, I use StrToFloat, then I show the result using:
> >
> >FormatDateTime('YYYY-MM-DD', myDate);
> >
> >On Linux I get: 2011-08-17 09:25:24
> >On Win32 I get: 34248-02-16 00:00:00
> >
> >Why the difference?.
> 
> Probably because strtofloat takes into account localization settings.
> 
> You should use val() from the system unit. It ignores localization.
> 
> Michael.

Here's more info. I didn't noted the field type on the PostgreSql
database is "timestamp without time zone", I thought it was type Date.

To get the value as TDateTime, I use myField.AsDateTime, then convert
this value to JSON this is server side. On client side, I receive the
string, then convert it to Variant, and using RTTI I assign the value to
a published property of an object.

To assign the variant value to the published property of tipe TDateTime, I use this:

PDouble(P)^ := VarAsType(lValue, varDouble);

On Delphi this works as expected. Could this assignment be causing the
wrong conversion?.

-- 
Leonardo M. Ramé
http://leonardorame.blogspot.com