Extensions Class
This class contains the LINQ to XML extension methods for XSD validation.
Namespace: System.Xml.Schema
Assembly: System.Xml.Linq (in System.Xml.Linq.dll)
| Name | Description | |
|---|---|---|
 | GetSchemaInfo(XAttribute) | Gets the post-schema-validation infoset (PSVI) of a validated attribute. |
| GetSchemaInfo(XElement) | Gets the post-schema-validation infoset (PSVI) of a validated element. |
| Validate(XDocument, XmlSchemaSet, ValidationEventHandler) | This method validates that an XDocument conforms to an XSD in an XmlSchemaSet. |
| Validate(XAttribute, XmlSchemaObject, XmlSchemaSet, ValidationEventHandler) | This method validates that an XAttribute conforms to a specified XmlSchemaObject and an XmlSchemaSet. |
| Validate(XDocument, XmlSchemaSet, ValidationEventHandler, Boolean) | Validates that an XDocument conforms to an XSD in an XmlSchemaSet, optionally populating the XML tree with the post-schema-validation infoset (PSVI). |
| Validate(XElement, XmlSchemaObject, XmlSchemaSet, ValidationEventHandler) | This method validates that an XElement sub-tree conforms to a specified XmlSchemaObject and an XmlSchemaSet. |
| Validate(XAttribute, XmlSchemaObject, XmlSchemaSet, ValidationEventHandler, Boolean) | Validates that an XAttribute conforms to a specified XmlSchemaObject and an XmlSchemaSet, optionally populating the XML tree with the post-schema-validation infoset (PSVI). |
| Validate(XElement, XmlSchemaObject, XmlSchemaSet, ValidationEventHandler, Boolean) | Validates that an XElement sub-tree conforms to a specified XmlSchemaObject and an XmlSchemaSet, optionally populating the XML tree with the post-schema-validation infoset (PSVI). |
This class also contains methods to get the post-schema-validation infoset (PSVI) of a validated XML node.
When you validate an XDocument, XElement, or XAttribute, you can also optionally populate the XML tree with the post-schema-validation infoset. PSVI information is added as an annotation of type System.Xml.Schema.XmlSchemaInfo.
The XSD in Sample XSD File: Customers and Orders contains a schema that can be used to validate the XML document in Sample XML File: Customers and Orders (LINQ to XML). The following example loads the schema and the document, validates the document, changes the document so that the xs:key and xs:keyref relationship is not valid, and then attempts to validate again.
XmlSchemaSet schemas = new XmlSchemaSet(); schemas.Add("", "CustomersOrders.xsd"); XDocument custOrd = XDocument.Load("CustomersOrders.xml"); Console.WriteLine("Validating custOrd"); bool errors = false; custOrd.Validate(schemas, (o, e) => { Console.WriteLine("{0}", e.Message); errors = true; }); Console.WriteLine("custOrd {0}", errors ? "did not validate" : "validated"); // Modify the custOrd tree so that it is no longer valid. custOrd.Root.Element("Orders").Element("Order").Element("CustomerID").Value = "AAAAA"; Console.WriteLine(); Console.WriteLine("Validating custOrd"); errors = false; custOrd.Validate(schemas, (o, e) => { Console.WriteLine("{0}", e.Message); errors = true; }); Console.WriteLine("custOrd {0}", errors ? "did not validate" : "validated");
This example produces the following output:
Validating custOrd custOrd validated Validating custOrd The key sequence 'AAAAA' in Keyref fails to refer to some key. custOrd did not validate
Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
