XmlSchemaAttributeGroup Class
TOC
Collapse the table of content
Expand the table of content

XmlSchemaAttributeGroup Class

Represents the attributeGroup element from the XML Schema as specified by the . AttributesGroups provides a mechanism to group a set of attribute declarations so that they can be incorporated as a group into complex type definitions.

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

'Declaration
Public Class XmlSchemaAttributeGroup
	Inherits XmlSchemaAnnotated
'Usage
Dim instance As XmlSchemaAttributeGroup

public class XmlSchemaAttributeGroup extends XmlSchemaAnnotated
public class XmlSchemaAttributeGroup extends XmlSchemaAnnotated
Not applicable.

An attribute group can be defined only as a child of the schema element. In this case, the name attribute must be present and contain the attribute, attributeGroup, or anyAttribute elements that make up the attribute group. When a complexType or an attributeGroup element includes an attribute group, the ref attribute must be present and the name attribute is not allowed.

The following example creates the attributeGroup element.

Option Strict On
Option Explicit On

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

Class XMLSchemaExamples
    Public Shared Sub Main()
        Dim schema As New XmlSchema()

        ' <xs:attributeGroup name="myAttributeGroup">
        Dim myAttributeGroup As New XmlSchemaAttributeGroup()
        schema.Items.Add(myAttributeGroup)
        myAttributeGroup.Name = "myAttributeGroup"

        ' <xs:attribute name="someattribute1" type="xs:integer"/>
        Dim someattribute1 As New XmlSchemaAttribute()
        myAttributeGroup.Attributes.Add(someattribute1)
        someattribute1.Name = "someattribute1"
        someattribute1.SchemaTypeName = New XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema")

        ' <xs:attribute name="someattribute2" type="xs:string"/>
        Dim someattribute2 As New XmlSchemaAttribute()
        myAttributeGroup.Attributes.Add(someattribute2)
        someattribute2.Name = "someattribute2"
        someattribute2.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema")

        ' <xs:complexType name="myElementType">
        Dim myElementType As New XmlSchemaComplexType()
        schema.Items.Add(myElementType)
        myElementType.Name = "myElementType"

        ' <xs:attributeGroup ref="myAttributeGroup"/>
        Dim myAttributeGroupRef As New XmlSchemaAttributeGroupRef()
        myElementType.Attributes.Add(myAttributeGroupRef)
        myAttributeGroupRef.RefName = New XmlQualifiedName("myAttributeGroup")

        ' <xs:attributeGroup name="myAttributeGroupA">
        Dim myAttributeGroupA As New XmlSchemaAttributeGroup()
        schema.Items.Add(myAttributeGroupA)
        myAttributeGroupA.Name = "myAttributeGroupA"

        ' <xs:attribute name="someattribute10" type="xs:integer"/>
        Dim someattribute10 As New XmlSchemaAttribute()
        myAttributeGroupA.Attributes.Add(someattribute10)
        someattribute10.Name = "someattribute10"
        someattribute10.SchemaTypeName = New XmlQualifiedName("integer", "http://www.w3.org/2001/XMLSchema")

        ' <xs:attribute name="someattribute11" type="xs:string"/>
        Dim someattribute11 As New XmlSchemaAttribute()
        myAttributeGroupA.Attributes.Add(someattribute11)
        someattribute11.Name = "someattribute11"
        someattribute11.SchemaTypeName = New XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema")

        ' <xs:attributeGroup name="myAttributeGroupB">
        Dim myAttributeGroupB As New XmlSchemaAttributeGroup()
        schema.Items.Add(myAttributeGroupB)
        myAttributeGroupB.Name = "myAttributeGroupB"

        ' <xs:attribute name="someattribute20" type="xs:date"/>
        Dim someattribute20 As New XmlSchemaAttribute()
        myAttributeGroupB.Attributes.Add(someattribute20)
        someattribute20.Name = "someattribute20"
        someattribute20.SchemaTypeName = New XmlQualifiedName("date", "http://www.w3.org/2001/XMLSchema")

        ' <xs:attributeGroup ref="myAttributeGroupA"/>
        Dim myAttributeGroupRefA As New XmlSchemaAttributeGroupRef()
        myAttributeGroupB.Attributes.Add(myAttributeGroupRefA)
        myAttributeGroupRefA.RefName = New XmlQualifiedName("myAttributeGroupA")

        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:attributeGroup name="myAttributeGroup">
        <xs:attribute name="someattribute1" type="xs:integer"/>
        <xs:attribute name="someattribute2" type="xs:string"/>
    </xs:attributeGroup>

    <xs:complexType name="myElementType">
        <xs:attributeGroup ref="myAttributeGroup"/>
    </xs:complexType>

    <xs:attributeGroup name="myAttributeGroupA">
        <xs:attribute name="someattribute10" type="xs:integer"/>
        <xs:attribute name="someattribute11" type="xs:string"/>
    </xs:attributeGroup>

    <xs:attributeGroup name="myAttributeGroupB">
        <xs:attribute name="someattribute20" type="xs:date"/>
        <xs:attributeGroup ref="myAttributeGroupA"/>
    </xs:attributeGroup>
</xs:schema>

System.Object
   System.Xml.Schema.XmlSchemaObject
     System.Xml.Schema.XmlSchemaAnnotated
      System.Xml.Schema.XmlSchemaAttributeGroup

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 98, Windows Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0

XNA Framework

Supported in: 1.0

Community Additions

ADD
Show:
© 2016 Microsoft