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Failure to register a method with Validation Event Handler causes an exception (Xml Exception) to be thrown when the XML document is found to be invalid or missing.After setting the Validation Type property, the Schema's property and Validation Event Handler of the Xml Reader Settings object, we are ready to create a validating Xml Reader.Using the Xml Document class, you can validate the XML content contained in an Xml Document object in two ways. If a Validation Event Handler is set on the validating Xml Reader, the Validation Event Handler will get called whenever an invalid type is encountered. Message) Exit Sub End Select End Sub End Class After modifications are made to an XML document, you can validate the modifications against the schema for the XML document using the Validate method of the Xml Document class. XPath Class Validating Reader Example Shared Sub Main(By Val args() As String) Try Dim settings As Xml Reader Settings = New Xml Reader Settings() settings.
Message) Exit Sub End Select End Sub End Class In the above example, an Xml Schema Validation Exception will be thrown when Load is called if any attribute or element type does not match the corresponding type specified in the validating schema. Create Navigator() Dim validation As Validation Event Handler = New Validation Event Handler(Address Of Schema Validation Handler) navigator.
Set the Xml Reader Settings object's Validation Type property to the value Validation Type.
Schema, indicating that we want the Xml Reader to perform validation with a schema as it reads an XML document.
The Add method receives as arguments a namespace URI that identifies the schema ( and the name and location of the schema file (in the current directory).
Create and set the properties of an Xml Reader Settings object.
Validate(Document Validation Handler); Xml Reader Settings settings = new Xml Reader Settings(); settings.