validating an XML schema in C# using DOM

[Stefan Roth]

Hi,

I have an existing DOM-object (instance of XmlDocumnt) filled with some
XML data. Now I want to validate that document against an XML schema. I
have a reference to an XML Schema for that purpose.
As far as I know I have to pass the code to a XmlValidatingRe ader. I do
this with an extra-XML-element which is wrong concerning the XML Schema.
Anyway the parser doesn't complain and reads the wrong XML data
without any remarks. Here are some code fragments:
private void validateXmlSche ma(XmlDocument doc) {

XmlSchemaCollec tion schemaCollectio n = new XmlSchemaCollec tion();

schemaCollectio n.ValidationEve ntHandler +=
newValidationEv entHandler(vali dationCallBack) ;

ValidationEvent Handler validationHandl er = new ValidationEvent Handler
(validationCall Back);

XmlSchema xmlSchema = THORXmlSchemaFa ctory.Instance
(THORXmlSchemaF actory.SchemaTy pe.HotelInterna l, validationHandl er);
// this generates the XmlSchema singleton

StringReader stReader = new StringReader (doc.OuterXml);
XmlTextReader reader = new XmlTextReader (stReader);
XmlValidatingRe ader vReader = new XmlValidatingRe ader(reader);
vReader.Schemas .Add (xmlSchema);
vReader.Validat ionType = ValidationType. Schema;

try {
while (vReader.Read() ){Console.Write (" {0} = \"{1}\";", vReader.Name,
vReader.Value); }
}
catch {
Console.WriteLi ne("Validation error!");
}
}

private void validationCallB ack(object sender, ValidationEvent Args e) {
Console.WriteLi ne("Validation Error: {0}", e.Message);
}

Neither do I get exceptions nor does the routine run into the
validationCallB ack.

Can anybody help me? Thanks!

Stefan