XmlSchemaAttribute Class
Represents the attribute element from the XML Schema as specified by the World Wide Web Consortium (W3C). Attributes provide additional information for other document elements. The attribute tag is nested between the tags of a document's element for the schema. The XML document displays attributes as named items in the opening tag of an element.
Assembly: System.Xml (in System.Xml.dll)
Attribute declarations can be present as child elements of the schema element (having global scope) or within complex type definitions. For complex types, attribute declarations can be present as local declarations or references to attributes with global scope. Both global and local attribute declarations have the optional type attribute that refers to an existing simple type. If the optional type attribute is not used, the attribute declaration (global or local) must define a local simple type.
The following example creates the attribute element.
Option Explicit On Option Strict On Imports System Imports System.Xml Imports System.Xml.Schema Class XMLSchemaExamples Public Shared Sub Main() Dim schema As New XmlSchema() ' <xs:attribute name="mybaseattribute"> Dim attributeBase As New XmlSchemaAttribute() schema.Items.Add(attributeBase) attributeBase.Name = "mybaseattribute" ' <xs:simpleType> Dim simpleType As New XmlSchemaSimpleType() attributeBase.SchemaType = simpleType ' <xs:restriction base="integer"> Dim restriction As New XmlSchemaSimpleTypeRestriction() simpleType.Content = restriction restriction.BaseTypeName = New XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema") ' <xs:maxInclusive value="1000"/> Dim maxInclusive As New XmlSchemaMaxInclusiveFacet() restriction.Facets.Add(maxInclusive) maxInclusive.Value = "1000" ' <xs:complexType name="myComplexType"> Dim complexType As New XmlSchemaComplexType() schema.Items.Add(complexType) complexType.Name = "myComplexType" ' <xs:attribute ref="mybaseattribute"/> Dim attributeBaseRef As New XmlSchemaAttribute() complexType.Attributes.Add(attributeBaseRef) attributeBaseRef.RefName = New XmlQualifiedName("mybaseattribute") Dim schemaSet As New XmlSchemaSet() AddHandler schemaSet.ValidationEventHandler, AddressOf ValidationCallbackOne schemaSet.Add(schema) schemaSet.Compile() Dim compiledSchema As XmlSchema = Nothing For Each schema1 As XmlSchema In schemaSet.Schemas() compiledSchema = schema1 Next Dim nsmgr As New XmlNamespaceManager(New NameTable()) nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema") compiledSchema.Write(Console.Out, nsmgr) End Sub 'Main Public Shared Sub ValidationCallbackOne(ByVal sender As Object, ByVal args As ValidationEventArgs) Console.WriteLine(args.Message) End Sub 'ValidationCallbackOne End Class 'XMLSchemaExamples
The following XML file is generated for the preceding code example.
<?xml version="1.0" encoding="IBM437"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:attribute name="mybaseattribute">
<xs:simpleType>
<xs:restriction base="xs:integer">
<xs:maxInclusive value="1000" />
</xs:restriction>
</xs:simpleType>
</xs:attribute>
<xs:complexType name="myComplexType">
<xs:attribute ref="mybaseattribute" />
</xs:complexType>
</xs:schema>
System.Xml.Schema.XmlSchemaObject
System.Xml.Schema.XmlSchemaAnnotated
System.Xml.Schema.XmlSchemaAttribute
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The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.