TimB wrote:
> Thank you.   I am doing wc3 validation though a little differently than your 
> sample.   
> Below is some VB.Net code I used to test with.   "Try1" is using your method 
> as close as I could translate it to VB.   "Try1" has the same results as your 
> test.  "Try2" is how I was doing validation.  I start with a loaded 
> XmlDocument (received via messaging) rather than from a file in the file 
> system.   To get the XML into the XmlReader I first save it to a memory 
> stream and then create the XmlReader with the content of the memory stream.   
> "Try2" does not pick up the validation error on the foo element.   "Try3" is 
> using my method but with the IgnoreWhitespace XMLReaderSetting set to true.  
> "Try3" does pick up both validation errors.    Something about saving the 
> XmlDocument to a memory stream and then creating the XmlReader from that 
> stream must change the white space in the document.   
> 
> This seems to have changed at the time I installed the .Net Framework 
> version 3.5 (Sp1).    I mistakenly believed the problem was caused by the bug 
> identified in article 826753.   Knowing that wasn't the case helped a great 
> deal!

If you have an XmlDocument and want to validate it then since .NET 2.0 
you have a Validate method
http://msdn.microsoft.com/en-us/library/system.xml.xmldocument.validate.aspx
that you can use:
   Dim doc As New XmlDocument()
   doc.LoadXml("<root>...</root>")
   doc.Schemas.Add(Nothing, "someSchemas.xsd")
   doc.Validate(new ValidationEventHandler(AddressOf 
someValidationEventHandler)

So there is no need to serialize to a MemoryStream and then create a 
reader over that memory stream. But if you want to do that then you can 
but you should ditch the XmlTextReader:

>     Sub try2(ByVal aobjXMLDoc As XmlDocument)
>         'Validate an xml document.  XML Document is alread loaded into an 
> XmlDocument object.
> 
>         System.Console.WriteLine("Try2")
>         Dim objXMLReaderSettigns As XmlReaderSettings = New XmlReaderSettings
>         objXMLReaderSettigns.ValidationType = ValidationType.Schema
>         objXMLReaderSettigns.Schemas.Add(Nothing, "c:\temp\xmlschema1.xsd")
>         AddHandler objXMLReaderSettigns.ValidationEventHandler, AddressOf 
> ValidationCallBack
> 
>         Dim objMemoryStrm As System.IO.Stream = New System.IO.MemoryStream
>         aobjXMLDoc.Save(objMemoryStrm)
>         objMemoryStrm.Position = 0

Remove the following line
>         Dim objTextReader As XmlTextReader = New XmlTextReader(objMemoryStrm)

then simply do
          Dim objXMLReader As XmlReader = XmlReader.Create(objMemoryStrm,
  objXMLReaderSettigns)

that should fix the problem I think.
-- 

	Martin Honnen --- MVP XML
	http://JavaScript.FAQTs.com/