Re: XML validation with multiple schemas

Continuing ...
My real-world multiple schemas are working out OK, but I cannot fathom the errors with a MSDN library example - using the XmlReader this time, and targetting .NET v2.0

I've copied the entire (very simple) VB.NET code I'm using, below. Sorry for the loss of indentation.

The sample code and data (XSD, XML) are at

The XML file is what's causing me the angst:

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"; xmlns="urn:dvdstore-schema" targetNamespace="urn:dvdstore-schema">
<xs:element name="dvd" type="xs:string" />
</xs:schema>
<pb:book price="7.99" xmlns:pb="urn:bookstore-schema">The Autobiography of Benjamin Franklin</pb:book>
<pd:dvd xmlns:pd="urn:dvdstore-schema">The Godfather</pd:dvd>
<pt:tape xmlns:pt="urn:tapestore-schema" xsi:schemaLocation="urn:tapestore-schema tape.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";>Il Postino</pt:tape>

Can anyone point me to where the error is caused (line4, position 4 is the runtime error on reader.Read() - I don't see the problem)

--
Ian Thomas
' ------------------------------------
' XMLValidation5
' ------------------------------------
Imports System

Imports System.Xml

Imports System.Xml.Schema

Imports System.IO

Public Class Sample

Public Shared errno As Integer

Public Shared Sub Main()

ChDir("C:\")

Console.WriteLine("Current location: " & CurDir())

Dim sc As XmlSchemaSet = New XmlSchemaSet()

' Add the schema to the collection.

' original sample -------------------------

'sc.Add("urn:bookstore-schema", "books.xsd")

' -----------------------------------------

sc.Add(Nothing, "c:\book.xsd")

sc.Add(Nothing, "c:\tape.xsd")

Dim settings As XmlReaderSettings = New XmlReaderSettings()

settings.ValidationType = ValidationType.Schema

settings.Schemas = sc

errno = 0

' Try some XmlSchemavalidationFlags

settings.ValidationFlags = settings.ValidationFlags Or XmlSchemaValidationFlags.ProcessInlineSchema

settings.ValidationFlags = settings.ValidationFlags Or XmlSchemaValidationFlags.ReportValidationWarnings

settings.ValidationFlags = settings.ValidationFlags Or XmlSchemaValidationFlags.ProcessSchemaLocation

AddHandler settings.ValidationEventHandler, AddressOf ValidationCallBack

' Create the XmlReader object.

Dim reader As XmlReader = XmlReader.Create("c:\mixed.xml", settings)

Try

' Parse the file.

While reader.Read() ' Error in mixed.xml: There are multiple root elements. Line 4, position 4.

End While

Catch e As XmlException

Console.WriteLine("LineNumber = {0}", e.LineNumber)

Console.WriteLine("LinePosition = {0}", e.LinePosition)

Console.WriteLine("Message = {0}", e.Message)

Console.WriteLine("Source = {0}", e.Source)

Console.WriteLine("SourceUri = {0}", e.SourceUri)

End Try

End Sub

' Display any validation errors.

Private Shared Sub ValidationCallBack(ByVal sender As Object, ByVal e As ValidationEventArgs)

errno = errno + 1

Console.WriteLine(" Validation error " & errno.ToString & "- Severity: {0} - Message: {1}", e.Severity, e.Message)

End Sub

End Class


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