Imports System
Imports System.Xml
Imports System.Xml.Schema
Imports System.Xml.XPath
Class ValidatingReaderExample
Shared Sub Main(ByVal args() As String)
Try
Dim settings As XmlReaderSettings = New XmlReaderSettings()
settings.Schemas.Add("http://www.yourname.com/books", "contosoBooks.xsd")
settings.ValidationType = ValidationType.Schema
Dim reader As XmlReader = XmlReader.Create("contosoBooks.xml", settings)
Dim document As XmlDocument = New XmlDocument()
document.Load(reader)
Dim navigator As XPathNavigator = document.CreateNavigator()
Dim validation As ValidationEventHandler = New ValidationEventHandler(AddressOf SchemaValidationHandler)
navigator.MoveToChild("bookstore", "http://www.yourname.com/books")
navigator.MoveToChild("book", "http://www.yourname.com/books")
navigator.MoveToChild("author", "http://www.yourname.com/books")
navigator.AppendChild("<title>Book Title</title>")
document.Validate(validation)
navigator.MoveToParent()
navigator.MoveToChild("price", "http://www.yourname.com/books")
navigator.SetTypedValue(DateTime.Now)
Catch e As Exception
Console.WriteLine("ValidatingReaderExample.Exception: {0}", e.Message)
End Try
End Sub
Shared Sub SchemaValidationHandler(ByVal sender As Object, ByVal e As ValidationEventArgs)
Select Case e.Severity
Case XmlSeverityType.Error
Console.WriteLine("Schema Validation Error: {0}", e.Message)
Exit Sub
Case XmlSeverityType.Warning
Console.WriteLine("Schema Validation Warning: {0}", e.Message)
Exit Sub
End Select
End Sub
End Class
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