[Mono-bugs] [Bug 475231] New: DateTime.ParseExact failes on fractions of seconds
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bugzilla_noreply at novell.com
Thu Feb 12 10:52:21 EST 2009
https://bugzilla.novell.com/show_bug.cgi?id=475231
Summary: DateTime.ParseExact failes on fractions of seconds
Classification: Mono
Product: Mono: Class Libraries
Version: SVN
Platform: x86-64
OS/Version: All
Status: NEW
Severity: Normal
Priority: P5 - None
Component: System
AssignedTo: mono-bugs at lists.ximian.com
ReportedBy: kps116 at gmail.com
QAContact: mono-bugs at lists.ximian.com
Found By: ---
Created an attachment (id=272355)
--> (https://bugzilla.novell.com/attachment.cgi?id=272355)
test.cs - test program
Description of Problem:
Converting and parsing a DateTime cuts milliseconds.
This seems due to the internal representation in a double.
Steps to reproduce the problem:
1. convert DateTime to string:
string conv = date.ToString("yyyy-MM-dd HH:mm:ss.FFFFFFF",
CultureInfo.InvariantCulture);
2. read string back to DateTime
dateread = DateTime.ParseExact(conv, "yyyy-MM-dd
HH:mm:ss.FFFFFFF", DateTimeFormatInfo.InvariantInfo, DateTimeStyles.None);
3. compare DateTime or DateTime.Ticks
Actual Results:
in: 2009-02-15 00:00:00.FFFFFFF is 633702528000000000
read: 2009-02-15 00:00:00.FFFFFFF is 633702528000000000
in: 2009-02-15 00:00:00.FFFFFFF is 633702528000000001
read: 2009-02-15 00:00:00.FFFFFFF is 633702528000000000
^
Expected Results:
(output from ms.net)
in: 2009-02-15 00:00:00 is 633702528000000000
read: 2009-02-15 00:00:00 is 633702528000000000
in: 2009-02-15 00:00:00.0000001 is 633702528000000001
read: 2009-02-15 00:00:00.0000001 is 633702528000000001
How often does this happen?
every time for certain DateTime's
Additional Information:
see attached test.cs
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