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XmlSchemaElement Class

Represents the element element from XML Schema as specified by the World Wide Web Consortium (W3C). This class is the base class for all particle types and is used to describe an element in an XML document.

Namespace:  System.Xml.Schema
Assembly:  System.Xml (in System.Xml.dll)

'Declaration
Public Class XmlSchemaElement _
	Inherits XmlSchemaParticle
'Usage
Dim instance As XmlSchemaElement

The following example creates the element element.

Imports System
Imports System.Xml
Imports System.Xml.Schema

Class XMLSchemaExamples
    Public Shared Sub Main()

        Dim schema As New XmlSchema()

        ' <xs:element name="cat" type="string"/> 
        Dim elementCat As New XmlSchemaElement()
        schema.Items.Add(elementCat)
        elementCat.Name = "cat"
        elementCat.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema")

        ' <xs:element name="dog" type="string"/> 
        Dim elementDog As New XmlSchemaElement()
        schema.Items.Add(elementDog)
        elementDog.Name = "dog"
        elementDog.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema")

        ' <xs:element name="redDog" substitutionGroup="dog" /> 
        Dim elementRedDog As New XmlSchemaElement()
        schema.Items.Add(elementRedDog)
        elementRedDog.Name = "redDog"
        elementRedDog.SubstitutionGroup = New XmlQualifiedName("dog")


        ' <xs:element name="brownDog" substitutionGroup ="dog" /> 
        Dim elementBrownDog As New XmlSchemaElement()
        schema.Items.Add(elementBrownDog)
        elementBrownDog.Name = "brownDog"
        elementBrownDog.SubstitutionGroup = New XmlQualifiedName("dog")


        ' <xs:element name="pets"> 
        Dim elementPets As New XmlSchemaElement()
        schema.Items.Add(elementPets)
        elementPets.Name = "pets" 

        ' <xs:complexType> 
        Dim complexType As New XmlSchemaComplexType()
        elementPets.SchemaType = complexType

        ' <xs:choice minOccurs="0" maxOccurs="unbounded"> 
        Dim choice As New XmlSchemaChoice()
        complexType.Particle = choice
        choice.MinOccurs = 0
        choice.MaxOccursString = "unbounded" 

        ' <xs:element ref="cat"/> 
        Dim catRef As New XmlSchemaElement()
        choice.Items.Add(catRef)
        catRef.RefName = New XmlQualifiedName("cat")

        ' <xs:element ref="dog"/> 
        Dim dogRef As New XmlSchemaElement()
        choice.Items.Add(dogRef)
        dogRef.RefName = New XmlQualifiedName("dog")

        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 used for the preceding code example.

<?xml version="1.0" encoding="IBM437"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
	<xs:element name="cat" type="xs:string"/>
	<xs:element name="dog" type="xs:string"/>
	<xs:element name="redDog" substitutionGroup="dog" />
	<xs:element name="brownDog" substitutionGroup ="dog" />

	<xs:element name="pets">
	  <xs:complexType>
	    <xs:choice minOccurs="0" maxOccurs="unbounded">
	      <xs:element ref="cat"/>
	      <xs:element ref="dog"/>
	    </xs:choice>
	  </xs:complexType>
	</xs:element>
</xs:schema>

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC, Xbox 360, Zune

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.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0

XNA Framework

Supported in: 3.0, 2.0, 1.0
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