XmlSchemaGroup Class
Represents the group element from XML Schema as specified by the World Wide Web Consortium (W3C). This class defines groups at the schema level that are referenced from the complex types. It groups a set of element declarations so that they can be incorporated as a group into complex type definitions.
Assembly: System.Xml (in System.Xml.dll)
The following example shows the use of the XmlSchemaGroup class.
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:element name="thing1" type="xs:string"/> Dim elementThing1 As New XmlSchemaElement() schema.Items.Add(elementThing1) elementThing1.Name = "thing1" elementThing1.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema") ' <xs:element name="thing2" type="xs:string"/> Dim elementThing2 As New XmlSchemaElement() schema.Items.Add(elementThing2) elementThing2.Name = "thing2" elementThing2.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema") ' <xs:element name="thing3" type="xs:string"/> Dim elementThing3 As New XmlSchemaElement() schema.Items.Add(elementThing3) elementThing3.Name = "thing3" elementThing3.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema") ' <xs:attribute name="myAttribute" type="xs:decimal"/> Dim myAttribute As New XmlSchemaAttribute() schema.Items.Add(myAttribute) myAttribute.Name = "myAttribute" myAttribute.SchemaTypeName = New XmlQualifiedName("decimal", "http://www.w3.org/2001/XMLSchema") ' <xs:group name="myGroupOfThings"> Dim myGroupOfThings As New XmlSchemaGroup() schema.Items.Add(myGroupOfThings) myGroupOfThings.Name = "myGroupOfThings" ' <xs:sequence> Dim sequence As New XmlSchemaSequence() myGroupOfThings.Particle = sequence ' <xs:element ref="thing1"/> Dim elementThing1Ref As New XmlSchemaElement() sequence.Items.Add(elementThing1Ref) elementThing1Ref.RefName = New XmlQualifiedName("thing1") ' <xs:element ref="thing2"/> Dim elementThing2Ref As New XmlSchemaElement() sequence.Items.Add(elementThing2Ref) elementThing2Ref.RefName = New XmlQualifiedName("thing2") ' <xs:element ref="thing3"/> Dim elementThing3Ref As New XmlSchemaElement() sequence.Items.Add(elementThing3Ref) elementThing3Ref.RefName = New XmlQualifiedName("thing3") ' <xs:complexType name="myComplexType"> Dim myComplexType As New XmlSchemaComplexType() schema.Items.Add(myComplexType) myComplexType.Name = "myComplexType" ' <xs:group ref="myGroupOfThings"/> Dim myGroupOfThingsRef As New XmlSchemaGroupRef() myComplexType.Particle = myGroupOfThingsRef myGroupOfThingsRef.RefName = New XmlQualifiedName("myGroupOfThings") ' <xs:attribute ref="myAttribute"/> Dim myAttributeRef As New XmlSchemaAttribute() myComplexType.Attributes.Add(myAttributeRef) myAttributeRef.RefName = New XmlQualifiedName("myAttribute") 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:element name="thing1" type="xs:string"/>
<xs:element name="thing2" type="xs:string"/>
<xs:element name="thing3" type="xs:string"/>
<xs:attribute name="myAttribute" type="xs:decimal"/>
<xs:group name="myGroupOfThings">
<xs:sequence>
<xs:element ref="thing1"/>
<xs:element ref="thing2"/>
<xs:element ref="thing3"/>
</xs:sequence>
</xs:group>
<xs:complexType name="myComplexType">
<xs:group ref="myGroupOfThings"/>
<xs:attribute ref="myAttribute"/>
</xs:complexType>
</xs:schema>
System.Xml.Schema.XmlSchemaObject
System.Xml.Schema.XmlSchemaAnnotated
System.Xml.Schema.XmlSchemaGroup
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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.