Imports System
Imports System.Xml
Imports System.Xml.Schema
Imports System.Xml.XPath
Class XPathValidation
Shared Sub Main()
Dim settings As XmlReaderSettings = New XmlReaderSettings()
settings.Schemas.Add("http://www.domain.com/books", "domainBooks.xsd")
settings.ValidationType = ValidationType.Schema
Dim reader As XmlReader = XmlReader.Create("domainBooks.xml", settings)
Dim document As XmlDocument = New XmlDocument()
document.Load(reader)
Dim eventHandler As ValidationEventHandler = New ValidationEventHandler(AddressOf ValidationEventHandler)
document.Validate(eventHandler)
Dim navigator As XPathNavigator = document.CreateNavigator()
navigator.MoveToFollowing("price", "http://www.domain.com/books")
Dim writer As XmlWriter = navigator.InsertAfter()
writer.WriteStartElement("anotherNode", "http://www.domain.com/books")
writer.WriteEndElement()
writer.Close()
document.Validate(eventHandler)
End Sub
Shared Sub ValidationEventHandler(ByVal sender As Object, ByVal e As ValidationEventArgs)
Select Case e.Severity
Case XmlSeverityType.Error
Console.WriteLine("Error: {0}", e.Message)
Case XmlSeverityType.Warning
Console.WriteLine("Warning {0}", e.Message)
End Select
End Sub
End Class