XML validation Problem

[paul]

Hi,
My code won't validate the xml document.
I'm using vb.net.
In the IDE I can use the schema to validate the XML. But when I use
XmlValidatingReader in code it does not pick any restrictions.

eg. in the following schema I want one and only one 'Header' element,
and I want a 'Message' element to be within a Messages element as
'Messages' is a collection of 'Message'.
If I change these in the IDE (when I've pulled them into the project)
the validation works. How can I do this through code.

Thanks in advance.
XSD File
---------
<?xml version="1.0" encoding="utf-8"?>
<schema id="DataTransfer" targetNamespace="http://www.Test.com"
xmlns:idtdt="http://www.Test.com"
xmlns="http://www.w3.org/2001/XMLSchema">
<!-- PACKAGE DOCUMENT -->
<element name="Doc">
<complexType>
<!-- Header Information -->
<sequence>
<element name="Header" maxOccurs="1" minOccurs="1">
<complexType>
<attribute name="FileName" type="string"
use="required" />
</complexType>
</element>
<!-- A collection of zero or more Messages -->
<element name="Messages" maxOccurs="1">
<complexType>
<sequence>
<!-- A Message -->
<element name="Message"
maxOccurs="unbounded">
<complexType>
<sequence>
<!-- A collection of zero or
more Parameters -->
<element name="Value"
type="string" />
</sequence>
<attribute name="MessageID"
type="string" use="required" />
</complexType>
</element>
</sequence>
</complexType>
</element>
</sequence>
</complexType>
<key name="PackageDocKey1">
<selector xpath=".//Message" />
<field xpath="@MessageID" />
</key>
<key name="PackageDocKey2">
<selector xpath="./Messages/Parameters/Parameter" />
<field xpath="@Name" />
</key>
</element>
<!-- Process Status Enumeration -->
</schema>


XML File
--------

<?xml version="1.0" encoding="utf-8" ?>
<Doc xmlns="http://www.Test.com">
<!-- Header is a once only entry -->
<Header FileName ="ZZZ.txt"></Header>
<!-- Messages is a collection of (0 or many) Message -->
<Messages>
<Message MessageID ="1">
<!-- Value is a once only entry -->
<Value>TEST1</Value>
</Message>
<Message MessageID ="2">
<Value>TEST4</Value>
</Message>
<Message MessageID ="3">
<Value>TEST3</Value>
</Message>
</Messages>
</Doc>

[Oleg Tkachenko]

paul wrote:

My code won't validate the xml document.
I'm using vb.net.
In the IDE I can use the schema to validate the XML. But when I use
XmlValidatingReader in code it does not pick any restrictions.

Most likely you have some mistake in your VB code. Show us relevaln
tpart and make sure you have read "Validation of XML with
XmlValidatingReader" at
http://msdn.microsoft.com/library/de...tingreader.asp

--
Oleg Tkachenko
http://www.tkachenko.com/blog
Multiconn Technologies, Israel

[paul]

Yes I've read the site.

'MY CODE

Option Strict On
Option Explicit On

Imports System
Imports System.IO
Imports System.Xml
Imports System.Xml.Schema
Imports Microsoft.VisualBasic

Public Class SchemaCollectionSample
Private doc1 As String = "test.xml"
Private reader As XmlTextReader = Nothing
Private vreader As XmlValidatingReader = Nothing
Private m_success As Boolean = True
Public Shared Sub Main()
Dim validation As New SchemaCollectionSample
End Sub 'Main

Public Sub New()
'Load the schema collection
Dim xsc As New XmlSchemaCollection
Try
xsc.Add("http://www.Test.com", New XmlTextReader("TestSchema.xsd"))
Catch ex As Exception
Console.WriteLine(ex.ToString())
End Try
'Validate the files using schemas stored in the collection.
Validate(doc1, xsc) 'Should pass.
End Sub 'New

Private Sub Validate(ByVal filename As String, ByVal xsc As XmlSchemaCollection)
m_success = True
Console.WriteLine()
Console.WriteLine("Validating XML file {0}...", filename.ToString())
reader = New XmlTextReader(filename)
'Create a validating reader.
vreader = New XmlValidatingReader(reader)

'Use the schemas stored in the schema collection.
vreader.Schemas.Add(xsc)
Try
'Read and validate the XML data.
While vreader.Read()
End While
Catch xmlEx As XmlException
Console.WriteLine(xmlEx.ToString())
Finally
'Close the reader.
vreader.Close()
End Try
End Sub
End Class

[Oleg Tkachenko]

Now I see.
First of all your test.xml is invalid against the schema. Both XML Spy
and your code throw validation error:

Validating XML file test.xml...

Unhandled Exception: System.Xml.Schema.XmlSchemaException: The element
'http://www.Test.com:Doc' has invalid child element
'http://www.Test.com:Header'. Expected 'Header'.

That's becuase your schema definition by default define all locally
defined elements to be unqualified. See
http://www.w3.org/TR/xmlschema-0/#UnqualLocals for more info.
To make it valid add elementFormDefault="qualified" to schema element:

<schema id="DataTransfer" targetNamespace="http://www.Test.com"
xmlns:idtdt="http://www.Test.com"
xmlns="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified">

--
Oleg Tkachenko
http://www.tkachenko.com/blog
Multiconn Technologies, Israel