Validating Modified xml : XML Validation « XML « VB.Net






Validating Modified xml

   

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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