Validating text files

Message) End Try End Sub Shared Sub Validation Event Handler(By Val sender As Object, By Val args As Validation Event Args) If args. Invalid modifications are then made to the XML document, and the document is then revalidated, causing schema validation errors. Dim document As Xml Document = New Xml Document() document. Add(" "contoso Books.xsd") ' Validate the XML document loaded into the DOM. Validate(Address Of Validation Event Handler) ' 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 validation to the console.

The Validate method validates the XML document against the XML schemas contained in the Schemas property of the Xml Document. Schema Class Xml Document Validation Example Shared Sub Main() Try ' Create a new Xml Document instance and load ' the XML document into the DOM.

As a result, typed XML data replaces previously untyped XML data.

After successful validation, schema defaults are applied, text values are converted to atomic values as necessary, and type information is associated with validated information items.

Inner Xml = "A" Dim price Nodes As Xml Node List = document. Select Single Node("/bk:bookstore/bk:book/bk:price", manager) Console.

Finally, one of the errors is corrected, and then part of the XML document is partially validated. Load("contoso Books.xml") ' Add the XML schema for the XML document to the ' Schemas property of the Xml Document. Dim manager As Xml Namespace Manager = New Xml Namespace Manager(document. Add Namespace("bk", " Dim price Node As Xml Node = document.

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.

The last book ' element is invalid, but not included in validation. Select Single Node("/bk:bookstore/bk:book", manager) document. Validate(Address Of Validation Event Handler, book Node) Catch ex As Xml Exception Console. 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. To validate the XML in the DOM, you can validate the XML as it is loaded into the DOM by passing a schema-validating Xml Reader to the Load method of the Xml Document class, or validate a previously unvalidated XML document in the DOM using the Validate method of the Xml Document class. The Xml Document class validates the XML data as it is loaded into the DOM when a validating Xml Reader is passed to the Load method of the Xml Document class. Create("contoso Books.xml", settings) ' The Xml Document validates the XML document contained ' in the Xml Reader as it is loaded into the DOM. After successful validation, schema defaults are applied, text values are converted to atomic values as necessary, and type information is associated with validated information items. Dim document As Xml Document = New Xml Document() document.

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