Strange problem when deserializing! (code include, long!)

[Thomas]

Hi,

I implemented a composite pattern which should be serializable to xml.
After spending some time in the newsgroups, i finally managed
serializing, even with utf-8 instead of utf-16, which causes ie
problems. But when deserializing the xml into the object structure,
the following exception is beeing thrown:

There is an error in XML document (3, 701).

Does anybody know how to bypass/solve this problem?

Code below (forget about toXml - I tried to generate the Xml-structure
on my own, but deserializing didn't work either)

Thanks in advance.

Thomas

the Composite Pattern ist implemented as follows:

public abstract class Suchkriterium
{
protected string sqlString;

public Suchkriterium() {}

public abstract string SqlString {get; set;}

public abstract string toXml();

}

public class Suchstring : bee2bee.edb.dal .suche.Suchkrit erium
{

public Suchstring() { this.sqlString = ""; }

public Suchstring(stri ng sqlString)
{
this.sqlString = sqlString;
}

public override string SqlString
{
get
{
return sqlString;
}
set
{
sqlString = value;
}
}

public override string toXml() {
return "<Suchstrin g xmlns:xsd=\"htt p:www.w3.org/2001/XMLScheme\" \n
xmlns:xsi=\"htt p:www.w3.org/2001/XMLScheme-instance\">\n<s qlString>" +
this.sqlString + "</sqlString>";
}
}

public abstract class Verknuepfung :
bee2bee.edb.dal .suche.Suchkrit erium
{
protected Suchkriterium rechterKnoten;
protected Suchkriterium linkerKnoten;
public Verknuepfung ()
{
rechterKnoten = null;
linkerKnoten = null;
}

public Suchkriterium RechterKnoten
{
get
{
return rechterKnoten;
}
set
{
rechterKnoten = value;
}
}
public Suchkriterium LinkerKnoten
{
get
{
return linkerKnoten;
}
set
{
linkerKnoten = value;
}
}

// toXml von linken und rechtem knoten
public override string toXml()
{
string s = "<" + this.GetType(). Name;
s += " xmlns:xsd=\"htt p:www.w3.org/2001/XMLScheme\" \n
xmlns:xsi=\"htt p:www.w3.org/2001/XMLScheme-instance\">\n<L inkerKnoten>";
s += this.linkerKnot en.toXml() +
"</LinkerKnoten>\n <RechterKnoten> ";
s += this.rechterKno ten.toXml() + "</RechterKnoten></";
s += this.GetType(). Name + ">";
return s;
}
}

public class NotIn : bee2bee.edb.dal .suche.Verknuep fung
{

public NotIn()
{
linkerKnoten = null;
rechterKnoten = null;
}

public override string SqlString
{
get
{
if (linkerKnoten != null && rechterKnoten != null)
{
// hier werden die zwei untergeordneten Verknuepfungen mit NOT IN
verbunden
// funktioniert nur unter der Annahme, dass die Primärschlüssel
der Tabellen 'id' heissen
return "(SELECT id FROM (" + linkerKnoten.Sq lString + ") tbl_" +
System.DateTime .Now.Ticks + " WHERE id NOT IN (" +
rechterKnoten.S qlString + "))";
}
else
{
throw new bee2bee.edb.exc eptions.dbSuchk riteriumExcepti on("bee2bee.edb .dal.suche.NotI n:
Mindestens einer der beiden Knoten ist null.");
}
}
set
{
throw new bee2bee.edb.exc eptions.dbSuchk riteriumExcepti on("Der
SqlString eines NotIn-Operators wird berechnet. Er kann nicht gesetzt
werden.");
}
}
}

public class Union : bee2bee.edb.dal .suche.Verknuep fung
{
public Union()
{
linkerKnoten = null;
rechterKnoten = null;
}

public override string SqlString
{

get
{
if (linkerKnoten == null && rechterKnoten == null)
{
throw new bee2bee.edb.exc eptions.dbSuchk riteriumExcepti on("bee2bee.edb .dal.suche.Unio n:
Beide Kinder des Union-Operators sind null.");
}
else if (linkerKnoten != null && rechterKnoten != null)
{

return "(SELECT id FROM ((" + linkerKnoten.Sq lString + ") UNION
(" + rechterKnoten.S qlString + ")) tbl_" + System.DateTime .Now.Ticks +
")";
}
else if (linkerKnoten == null)
{
return rechterKnoten.S qlString;
}
else
{
return linkerKnoten.Sq lString;
}
}
set
{
throw new bee2bee.edb.exc eptions.dbSuchk riteriumExcepti on("Der
SqlString eines Union-Operators wird berechnet. Er kann nicht gesetzt
werden.");
}
}
}
Property for (de-)serializing:

=============== =============== =============== =============== ====

public suche.Suchkrite rium Suchkriterium
{
get
{
// deserialisiere xmlinhalt -> suchkriterium
// benutze dabei die Wrapper-Klasse XmlSuchkriteriu m, da
Suchkriterium nicht direkt serialisiert werden kann
Type [] extraTypes = new Type[4];
extraTypes[0] = typeof(suche.No tIn);
extraTypes[1] = typeof(suche.Su chstring);
extraTypes[2] = typeof(suche.Un ion);
extraTypes[3] = typeof(suche.Ve rknuepfung);

XmlSerializer s = new XmlSerializer(s uchkriterium.Ge tType(),
extraTypes);
StringReader sr = new StringReader(xm linhalt);
XmlTextReader xr = new XmlTextReader(s r);
Console.Out.Wri teLine(xmlinhal t);
try
{
Console.Out.Wri teLine(s.CanDes erialize(xr));
suchkriterium = (suche.Suchkrit erium)s.Deseria lize(xr);
}
catch (Exception e)
{
Console.Out.Wri teLine(e.ToStri ng());
}

return suchkriterium;
}
set
{
suchkriterium = value; // setze die Objektreferenz

Type [] extraTypes = new Type[4];
extraTypes[0] = typeof(suche.No tIn);
extraTypes[1] = typeof(suche.Su chstring);
extraTypes[2] = typeof(suche.Un ion);
extraTypes[3] = typeof(suche.Ve rknuepfung);
XmlSerializer s = new XmlSerializer(s uchkriterium.Ge tType(),
extraTypes); // instanziiere XmlSerializier für Benutzung mit
XmlSuchkriteriu m

MemoryStream mem = new MemoryStream();
StreamWriter pobjStreamWrite r = new StreamWriter(me m, new
System.Text.UTF 8Encoding());

try
{
s.Serialize(pob jStreamWriter, suchkriterium); // just do
it.
}
catch (System.Xml.Xml Exception ex)
{
Console.Out.Wri teLine(ex.Messa ge);
}

mem.Position = 0;
xmlinhalt = new StreamReader(me m).ReadToEnd();

}
}

=============== =============== =============== =============== ====

[Joe Feser]

Is the IE problem say something along the lines of you may not change
encoding?

You may be enclosing utf-8 text inside utf-16 or using another encoding.

I would like to see the original xml document that you were having problems
with IE.

Could you attach a copy and send it to the group?

Joe Feser

"Thomas" <th************ ***@bee2bee.biz > wrote in message
news:19******** *************** ***@posting.goo gle.com...

Hi,

I implemented a composite pattern which should be serializable to xml.
After spending some time in the newsgroups, i finally managed
serializing, even with utf-8 instead of utf-16, which causes ie
problems. But when deserializing the xml into the object structure,
the following exception is beeing thrown:

There is an error in XML document (3, 701).

Does anybody know how to bypass/solve this problem?

Code below (forget about toXml - I tried to generate the Xml-structure
on my own, but deserializing didn't work either)

Thanks in advance.

Thomas

the Composite Pattern ist implemented as follows:

public abstract class Suchkriterium
{
protected string sqlString;

public Suchkriterium() {}

public abstract string SqlString {get; set;}

public abstract string toXml();

}

public class Suchstring : bee2bee.edb.dal .suche.Suchkrit erium
{

public Suchstring() { this.sqlString = ""; }

public Suchstring(stri ng sqlString)
{
this.sqlString = sqlString;
}

public override string SqlString
{
get
{
return sqlString;
}
set
{
sqlString = value;
}
}

public override string toXml() {
return "<Suchstrin g xmlns:xsd=\"htt p:www.w3.org/2001/XMLScheme\" \n
xmlns:xsi=\"htt p:www.w3.org/2001/XMLScheme-instance\">\n<s qlString>" +
this.sqlString + "</sqlString>";
}
}

public abstract class Verknuepfung :
bee2bee.edb.dal .suche.Suchkrit erium
{
protected Suchkriterium rechterKnoten;
protected Suchkriterium linkerKnoten;
public Verknuepfung ()
{
rechterKnoten = null;
linkerKnoten = null;
}

public Suchkriterium RechterKnoten
{
get
{
return rechterKnoten;
}
set
{
rechterKnoten = value;
}
}
public Suchkriterium LinkerKnoten
{
get
{
return linkerKnoten;
}
set
{
linkerKnoten = value;
}
}

// toXml von linken und rechtem knoten
public override string toXml()
{
string s = "<" + this.GetType(). Name;
s += " xmlns:xsd=\"htt p:www.w3.org/2001/XMLScheme\" \n
xmlns:xsi=\"htt p:www.w3.org/2001/XMLScheme-instance\">\n<L inkerKnoten>";
s += this.linkerKnot en.toXml() +
"</LinkerKnoten>\n <RechterKnoten> ";
s += this.rechterKno ten.toXml() + "</RechterKnoten></";
s += this.GetType(). Name + ">";
return s;
}
}

public class NotIn : bee2bee.edb.dal .suche.Verknuep fung
{

public NotIn()
{
linkerKnoten = null;
rechterKnoten = null;
}

public override string SqlString
{
get
{
if (linkerKnoten != null && rechterKnoten != null)
{
// hier werden die zwei untergeordneten Verknuepfungen mit NOT IN
verbunden
// funktioniert nur unter der Annahme, dass die Primärschlüssel
der Tabellen 'id' heissen
return "(SELECT id FROM (" + linkerKnoten.Sq lString + ") tbl_" +
System.DateTime .Now.Ticks + " WHERE id NOT IN (" +
rechterKnoten.S qlString + "))";
}
else
{
throw new bee2bee.edb.exc eptions.dbSuchk riteriumExcepti on("bee2bee.edb .dal.suche.NotI n
: Mindestens einer der beiden Knoten ist null.");
}
}
set
{
throw new bee2bee.edb.exc eptions.dbSuchk riteriumExcepti on("Der
SqlString eines NotIn-Operators wird berechnet. Er kann nicht gesetzt
werden.");
}
}
}

public class Union : bee2bee.edb.dal .suche.Verknuep fung
{
public Union()
{
linkerKnoten = null;
rechterKnoten = null;
}

public override string SqlString
{

get
{
if (linkerKnoten == null && rechterKnoten == null)
{
throw new bee2bee.edb.exc eptions.dbSuchk riteriumExcepti on("bee2bee.edb .dal.suche.Unio n
: Beide Kinder des Union-Operators sind null.");
}
else if (linkerKnoten != null && rechterKnoten != null)
{

return "(SELECT id FROM ((" + linkerKnoten.Sq lString + ") UNION
(" + rechterKnoten.S qlString + ")) tbl_" + System.DateTime .Now.Ticks +
")";
}
else if (linkerKnoten == null)
{
return rechterKnoten.S qlString;
}
else
{
return linkerKnoten.Sq lString;
}
}
set
{
throw new bee2bee.edb.exc eptions.dbSuchk riteriumExcepti on("Der
SqlString eines Union-Operators wird berechnet. Er kann nicht gesetzt
werden.");
}
}
}
Property for (de-)serializing:

=============== =============== =============== =============== ====

public suche.Suchkrite rium Suchkriterium
{
get
{
// deserialisiere xmlinhalt -> suchkriterium
// benutze dabei die Wrapper-Klasse XmlSuchkriteriu m, da
Suchkriterium nicht direkt serialisiert werden kann
Type [] extraTypes = new Type[4];
extraTypes[0] = typeof(suche.No tIn);
extraTypes[1] = typeof(suche.Su chstring);
extraTypes[2] = typeof(suche.Un ion);
extraTypes[3] = typeof(suche.Ve rknuepfung);

XmlSerializer s = new XmlSerializer(s uchkriterium.Ge tType(),
extraTypes);
StringReader sr = new StringReader(xm linhalt);
XmlTextReader xr = new XmlTextReader(s r);
Console.Out.Wri teLine(xmlinhal t);
try
{
Console.Out.Wri teLine(s.CanDes erialize(xr));
suchkriterium = (suche.Suchkrit erium)s.Deseria lize(xr);
}
catch (Exception e)
{
Console.Out.Wri teLine(e.ToStri ng());
}

return suchkriterium;
}
set
{
suchkriterium = value; // setze die Objektreferenz

Type [] extraTypes = new Type[4];
extraTypes[0] = typeof(suche.No tIn);
extraTypes[1] = typeof(suche.Su chstring);
extraTypes[2] = typeof(suche.Un ion);
extraTypes[3] = typeof(suche.Ve rknuepfung);
XmlSerializer s = new XmlSerializer(s uchkriterium.Ge tType(),
extraTypes); // instanziiere XmlSerializier für Benutzung mit
XmlSuchkriteriu m

MemoryStream mem = new MemoryStream();
StreamWriter pobjStreamWrite r = new StreamWriter(me m, new
System.Text.UTF 8Encoding());

try
{
s.Serialize(pob jStreamWriter, suchkriterium); // just do
it.
}
catch (System.Xml.Xml Exception ex)
{
Console.Out.Wri teLine(ex.Messa ge);
}

mem.Position = 0;
xmlinhalt = new StreamReader(me m).ReadToEnd();

}
}

=============== =============== =============== =============== ====