Validate xml with an XSD file

Have a look at :
http://www.codeguru.com/Csharp/Csharp/cs_data/xml/article.php/c6737/

and instead of passing a filename to the validator, pass a string containing your xml.

so:
vr = new XmlValidatingReader( strXMLDoc,
                         XmlNodeType.Document, null);
will be
vr = new XmlValidatingReader( strYourXMLDataString,
                         XmlNodeType.Document, null);

thank you pockymaster
i use you the link above to create this class in vb.net 2005

    Public Class XML
        Private errorsCount As Int32 = 0
        Private errorMsg As StringBuilder

        Public Sub ValidationHandler(ByVal sender As Object, ByVal args As ValidationEventArgs)
            With errorMsg
                .Append(args.Message)
                .Append(vbCrLf)
            End With
            errorsCount += 1
        End Sub

        Public Function validateXml(ByVal strXMLDoc As String, ByVal xsdFile As String) As Boolean
            Dim tr As XmlTextReader = Nothing
            Dim xss As XmlSchemaSet = Nothing
            Dim xrs As XmlReaderSettings = Nothing
            Dim xr As XmlReader

            tr = New XmlTextReader(xsdFile)
            xss = New XmlSchemaSet
            xss.Add(Nothing, tr)

            xrs = New XmlReaderSettings

            xrs.Schemas.Add(xss)

            xrs.ValidationType = ValidationType.Schema
            AddHandler xrs.ValidationEventHandler, AddressOf ValidationHandler

            errorMsg = New StringBuilder
            errorMsg.Remove(0, errorMsg.Length)

            xr = XmlReader.Create(strXMLDoc, xrs)

            While xr.Read

            End While

            xr.Close()

            If errorsCount > 0 Then
                Return False
            Else
                Return True
            End If
        End Function
    End Class


but it doesn't work, i don't know why because when the xml is correct, that's ok the class works fine
when i modify the root (make an error), the class works fine too
and when i modify the childrent, the class doesn't detect the error

can you help me?

regards

that's strange...

does the validationHandler is called only once when it detect an error?
because when i make several error in the XML, the validationHandler is called only once and then the reader continue to read without calling validationHandler again even there are other error...
otherwise the class works fine but don't called the validation error as many times i put error in xml string.

here is the XSD maybe it will help you to make me understand.

<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <xsd:complexType name="ROOTTYPE">
  <xsd:sequence>
    <xsd:element name="ID" type="xsd:string"/>
    <xsd:element name="VALIDITY" type="xsd:string"/>
    <xsd:element name="TYPE" type="xsd:string"/>
    <xsd:element name="TXT" type="xsd:string"/>
    <xsd:element name="IMG" type="xsd:string"/>
  </xsd:sequence>
</xsd:complexType>
<xsd:element name="ROOT" type="ROOTTYPE"/>
</xsd:schema>


regards

If I create invalid attributes, it will go through the validationHandler for each attribute
If i create invalid members it returns only the last wrong element... hmm.. maybe I'm missing something as well

thank you, i'll manage with that for now :)