XmlValidatingReader: continue parsing after XmlException

[George W.]

When attempting to validate an XML file, If the file is valid, it
validates correctly, and it will catch most ValidationEvent s without
problem. However, I keep getting the following Exception:
System.Xml.XmlE xception: The 'RDaaaa' start tag on line '4' doesn't
match the end tag of 'RD' in file 'file:///C:/Work/WIMAR
XML/WI_M_1.xml'. Line 4, position 475.
at System.Xml.XmlT extReader.Parse Tag()
at System.Xml.XmlT extReader.Parse BeginTagExpandC harEntities()
at System.Xml.XmlT extReader.Read( )
at System.Xml.XmlV alidatingReader .ReadWithCollec tTextToken()
at System.Xml.XmlV alidatingReader .Read()
at XMLValidator.XM LEvaluator.Eval uate(String configPath) in
c:\documents and settings\gwalke r\my documents\visua l studio
projects\xmlval idator\xmlevalu ator.cs:line 43

Well, this technically is doing what it's supposed to be doing, but I'd
rather have XmlExceptions fired as Events rather than throwing
exceptions. With a try-finally block, I want to easily be able to get
back into reading the XML file after an exception like this. (I am sort
of a newbie in all this, so apologies if this is a really really simple
question.)

I know that my XML and schema are valid. I introduced the error for
testing purposes.
I'm using the following example code from MSDN:
public void Evaluate(string configPath)
{
/**
* if file is okay, return 1
* if file is not okay, return error string
*/
XmlTextReader evaluated = new XmlTextReader(c onfigPath);
XmlValidatingRe ader val = new XmlValidatingRe ader(evaluated) ;


try
{
Console.WriteLi ne("Validating XML file ");

// Set the validation event handler
val.ValidationE ventHandler += new
ValidationEvent Handler(this.Va lidationEventHa ndle);

// Read XML data
while (val.Read()){}

Console.WriteLi ne ("Validation finished. Validation {0}",
(m_success==tru e ? "successful " : "failed"));
}
finally
{
//Close the reader.
if (val != null)
val.Close();
}
}// end of Evaluate method

private void ValidationEvent Handle (object sender, ValidationEvent Args
args)
{
m_success = false;
Console.WriteLi ne("Validation error: " + args.Message );
}

[Zafar Abbas [MSFT]]

Re: XmlValidatingRe ader: continue parsing after XmlException

>Well, this technically is doing what it's supposed to be doing, but I'd[color=blue]
>rather have XmlExceptions fired as Events rather than throwing
>exceptions. With a try-finally block, I want to easily be able to get
>back into reading the XML file after an exception like this. (I am sort
>of a newbie in all this, so apologies if this is a really really simple
>question.)[/color]

The Validation event handler only catches violations of the schema in the
XML document. But the Xml Document need to be well formed to begin with.
Parsing can NOT continue after encountering a well formedness errors.