[Mono-dev] Bug in handling of Datetime in Xml Serialization - testcase in msg

[Mads Bondo Dydensborg]

mandag 07 Januar 2008 skrev Atsushi Eno:
> Hello,
> 
> I'll take a look, but it had better be filed as a bug on bugzilla so
> that the issue can be tracked down and is safer in case I just forget:
> http://www.mono-project.com/Bugs

Surprisingly, my novell login appears to work. So, I have filed: 
https://bugzilla.novell.com/show_bug.cgi?id=352210

Getting a "confirmed" status on the bug would be nice. A solution even 
better! :-)

Regards

Mads

> 
> Atsushi Eno
> 
> Mads Bondo Dydensborg wrote:
> > Hi there
> > 
> > I have a difference between output in current Mono SVN and Windows 2.xxx. 
The 
> > following program construcs an object containing a date from an xml 
string, 
> > serializes and deserializes a couple of times. On Windows, the output 
remains 
> > stable, on Mono/Linux, my timezone appears to be substracted once for each 
> > serialization/deserialization call.
> > 
> > Here is the program:
> > 
> > ---------------
> > 
> > using System;
> > using System.IO;
> > using System.Text;
> > using System.Xml;
> > using System.Xml.Serialization;
> > 
> > [System.Xml.Serialization.XmlRootAttribute(Namespace="", 
IsNullable=false)]
> > public class test {
> >   public System.DateTime date;
> > }
> > 
> > public class Test {
> > 
> >   public static string DeSe( string doc ) {
> >     // Deserialize
> >     XmlSerializer serializer = new XmlSerializer( typeof ( test ) );
> >     StringReader sr = new StringReader( doc );
> >     XmlReader reader = XmlReader.Create( sr );
> >     test t     = (test) serializer.Deserialize( reader );
> >     reader.Close();
> >     sr.Close();
> >     
> >     // Serialize
> >     MemoryStream memStream         = new MemoryStream();
> >     XmlTextWriter writer           = new XmlTextWriter( memStream, 
> > Encoding.UTF8 );
> >     serializer.Serialize( writer, t );
> >     writer.Close();
> >     memStream.Close();
> > 
> >     string xml;
> >     xml = Encoding.UTF8.GetString(memStream.GetBuffer());
> >     xml = xml.Substring(xml.IndexOf(Convert.ToChar(60)));
> >     xml = xml.Substring(0, (xml.LastIndexOf(Convert.ToChar(62)) + 1));
> >     return xml;
> >   }
> > 
> >   public static void Main() {
> >     // Start with 10:30, no timezone
> >     string doc = @"<test><date>2007-06-15T10:30:10.5</date></test>";
> >     Console.WriteLine( "doc   = '{0}'", doc );
> >       
> >     string docm = DeSe( doc );
> >     Console.WriteLine( "docm  = '{0}'", docm );
> >       
> >     string doc2m = DeSe( docm );
> >     Console.WriteLine( "doc2m = '{0}'", doc2m );
> > 
> >     string doc3m = DeSe( doc2m );
> >     Console.WriteLine( "doc3m = '{0}'", doc3m );
> >   }
> > }        
> > 
> > ----------
> > 
> > Here is the ouput from Windows:
> > doc   = '<test><date>2007-06-15T10:30:10.5</date></test>'
> > docm  = '<?xml version="1.0" encoding="utf-8"?><test 
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
> > 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"><date>2007-06-15T10:30:10.5</date></test>'
> > doc2m = '<?xml version="1.0" encoding="utf-8"?><test 
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
> > 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"><date>2007-06-15T10:30:10.5</date></test>'
> > doc3m = '<?xml version="1.0" encoding="utf-8"?><test 
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
> > 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"><date>2007-06-15T10:30:10.5</date></test>'
> > 
> > And here is from current Mono SVN (1.2.6 same):
> > 
> > doc   = '<test><date>2007-06-15T10:30:10.5</date></test>'
> > docm  = '<?xml version="1.0" encoding="utf-8"?><test 
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
> > 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"><date>2007-06-15T10:30:10.5+02:00</date></test>'
> > doc2m = '<?xml version="1.0" encoding="utf-8"?><test 
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
> > 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"><date>2007-06-15T08:30:10.5+02:00</date></test>'
> > doc3m = '<?xml version="1.0" encoding="utf-8"?><test 
> > xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
> > 
xmlns:xsd="http://www.w3.org/2001/XMLSchema"><date>2007-06-15T06:30:10.5+02:00</date></test>'
> > 
> > Note how the time "shifts" on Mono. I believe this is a bug.
> > 
> > Regards
> > 
> > Mads
> > 
> 
> 
> 



-- 
Med venlig hilsen/Regards

Systemudvikler/Systemsdeveloper cand.scient.dat, Ph.d., Mads Bondo Dydensborg
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