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Vb net validating xml

If it finds the document is not a valid XML schema, it generates the error telling the problem in the schema.

To validate an XML document, construct an Xml Reader Settings object that contains an XML schema definition language (XSD) schema with which to validate the XML document. For more information on validating XML documents with LINQ to XML, see How to: Validate Using XSD. Validation Event Handler, New Validation Event Handler(Address Of books Settings Validation Event Handler) Dim books As Xml Reader = Xml Reader. Read() End While End Sub Shared Sub books Settings Validation Event Handler(By Val sender As Object, By Val e As Validation Event Args) If e.

As a result, typed XML data replaces previously untyped XML data. Load(reader) ' Make an invalid change to the first and last ' price elements in the XML document, and write ' the Xml Schema Info values assigned to the price ' element during load validation to the console.

To create an XML schema-validating Xml Reader, follow these steps. Dim manager As Xml Namespace Manager = New Xml Namespace Manager(document. Add Namespace("bk", " Dim price Node As Xml Node = document.

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.

When the program encounters the invalid node, the method Validation Error is called that displays a message explaining why validation failed. An object of the class Xml Schema Set stores a collection of schemas that an Xml Reader can be validated against.

It assigns a new Xml Schema Set object to variable schemas, and calls this object's Add method to add a schema to the collection.

The Xml Document class does not validate the XML in the Document Object Model (DOM) against an XML Schema definition language (XSD) schema or document type definition (DTD) by default; the XML is only verified to be well-formed.