validating XML with XmlValidatingReader

[prefersgolfing]

I have a doc that that I am entering an incorrect value in a node that
expects an restricted enumeration yet I can't get the ValidationEventHandler
to fire. Shouldn't it fire if it finds an enumeration that's not listed in
the schema? I've also misspelled node tags and it still won't fire. Am I
missing something? Thanks.

Public Shared Function IsValid(ByVal cXML As String) As Boolean

_valid = True

Dim schemaColl As XmlSchemaCollection

schemaColl = New XmlSchemaCollection

schemaColl.Add(Nothing, New XmlTextReader("..\myXSD.xsd"))

Dim ioStream As Stream

ioStream = New MemoryStream(ASCIIEncoding.Default.GetBytes(cXML))

Dim xmlReader As XmlTextReader

xmlReader = New XmlTextReader(ioStream)

Dim xmlValidator As XmlValidatingReader

xmlValidator = New XmlValidatingReader(xmlReader)

xmlValidator.ValidationType = ValidationType.Schema

xmlValidator.Schemas.Add(schemaColl)

AddHandler xmlValidator.ValidationEventHandler, AddressOf ValidationError

While xmlValidator.Read()

End While

Return _valid

xmlReader.Close()

xmlValidator.Close()

End Function

Private Shared Sub ValidationError(ByVal sender As Object, ByVal args As
ValidationEventArgs)

_valid = False

End Sub

[Brad Wood]

prefersgolfing wrote:

I have a doc that that I am entering an incorrect value in a node that
expects an restricted enumeration yet I can't get the ValidationEventHandler
to fire. Shouldn't it fire if it finds an enumeration that's not listed in
the schema? I've also misspelled node tags and it still won't fire. Am I
missing something? Thanks.

I've not used the validating reader. Perhaps this sample method (that
does fire events) will help:

private void checkSchema( string document )
{
XmlReader schemaReader = null;
XmlReader docReader = null;
MemoryStream ms = null;

XmlReaderSettings settings = new XmlReaderSettings();
settings.ValidationEventHandler += new
System.Xml.Schema.ValidationEventHandler( schemaValidationEventHandler );
settings.ValidationType = ValidationType.Schema;

try
{
ms = /* my method to convert string to a mem stream */;
string schemaPath = /* my method to get path */;
schemaReader = XmlReader.Create( schemaPath );
settings.Schemas.Add( null, schemaReader );
docReader = XmlReader.Create( ms, settings );
while ( docReader.Read() ) { };
}
finally
{
schemaReader.Close();
docReader.Close();
if ( ms != null ) { ms.Close(); }
}
}