XmlSchemaPatternFacet Class
.NET Framework 2.0
Represents the pattern element from XML Schema as specified by the World Wide Web Consortium (W3C). This class can be used to specify a restriction on the value entered for a simpleType element.
Namespace: System.Xml.Schema
Assembly: System.Xml (in system.xml.dll)
Assembly: System.Xml (in system.xml.dll)
The following example shows the use of the XmlSchemaPatternFacet class.
Imports System Imports System.Xml Imports System.Xml.Schema Class XMLSchemaExamples Public Shared Sub Main() Dim schema As New XmlSchema() ' <xs:simpleType name="ZipCodeType"> Dim ZipCodeType As New XmlSchemaSimpleType() ZipCodeType.Name = "ZipCodeType" ' <xs:restriction base="xs:string"> Dim restriction As New XmlSchemaSimpleTypeRestriction() restriction.BaseTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema") ' <xs:pattern value="[0-9]{5}(-[0-9]{4})?"/> Dim pattern As New XmlSchemaPatternFacet() pattern.Value = "[0-9]{5}(-[0-9]{4})?" restriction.Facets.Add(pattern) ZipCodeType.Content = restriction schema.Items.Add(ZipCodeType) ' <xs:element name="Address"> Dim element As New XmlSchemaElement() element.Name = "Address" ' <xs:complexType> Dim complexType As New XmlSchemaComplexType() ' <xs:attribute name="ZipCode" type="ZipCodeType"/> Dim ZipCodeAttribute As New XmlSchemaAttribute() ZipCodeAttribute.Name = "ZipCode" ZipCodeAttribute.SchemaTypeName = New XmlQualifiedName("ZipCodeType", "") complexType.Attributes.Add(ZipCodeAttribute) element.SchemaType = complexType schema.Items.Add(element) 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 Public Shared Sub ValidationCallbackOne(ByVal sender As Object, ByVal args As ValidationEventArgs) Console.WriteLine(args.Message) End Sub End Class
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:simpleType name="ZipCodeType">
<xs:restriction base="xs:string">
<xs:pattern value="[0-9]{5}(-[0-9]{4})?"/>
</xs:restriction>
</xs:simpleType>
<xs:element name="Address">
<xs:complexType>
<xs:attribute name="ZipCode" type="ZipCodeType"/>
</xs:complexType>
</xs:element>
</xs:schema>
System.Object
System.Xml.Schema.XmlSchemaObject
System.Xml.Schema.XmlSchemaAnnotated
System.Xml.Schema.XmlSchemaFacet
System.Xml.Schema.XmlSchemaPatternFacet
System.Xml.Schema.XmlSchemaObject
System.Xml.Schema.XmlSchemaAnnotated
System.Xml.Schema.XmlSchemaFacet
System.Xml.Schema.XmlSchemaPatternFacet
Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see System Requirements.
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