XmlSchemaEnumerationFacet クラスとは何？わかりやすく解説 Weblio辞書

XmlSchemaEnumerationFacet クラス

W3C (World Wide Web Consortium) で指定された XML スキーマの enumeration ファセットを表します。このクラスは、simpleType 要素の有効な値のリストを指定します。宣言は、restriction 宣言の中に含まれます。

名前空間: System.Xml.Schema
アセンブリ: System.Xml (system.xml.dll 内)
構文

Visual Basic (宣言)

Public Class XmlSchemaEnumerationFacet
    Inherits XmlSchemaFacet

Visual Basic (使用法)

Dim instance As XmlSchemaEnumerationFacet

public class XmlSchemaEnumerationFacet : XmlSchemaFacet

C++

public ref class XmlSchemaEnumerationFacet
 : public XmlSchemaFacet

public class XmlSchemaEnumerationFacet extends
 XmlSchemaFacet

JScript

public class XmlSchemaEnumerationFacet extends
 XmlSchemaFacet

使用例

XmlSchemaEnumerationFacet クラスを使用する例を次に示します。

Visual Basic

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:simpleType name="SizeType">
        Dim SizeType As New
 XmlSchemaSimpleType()
        SizeType.Name = "SizeType"

        ' <xs:restriction base="xs:string">
        Dim restriction As New
 XmlSchemaSimpleTypeRestriction()
        restriction.BaseTypeName = New XmlQualifiedName("string",
 "http://www.w3.org/2001/XMLSchema")

        ' <xs:enumeration value="Small"/>
        Dim enumerationSmall As New
 XmlSchemaEnumerationFacet()
        enumerationSmall.Value = "Small"
        restriction.Facets.Add(enumerationSmall)

        ' <xs:enumeration value="Medium"/>
        Dim enumerationMedium As New
 XmlSchemaEnumerationFacet()
        enumerationMedium.Value = "Medium"
        restriction.Facets.Add(enumerationMedium)

        ' <xs:enumeration value="Large"/>
        Dim enumerationLarge As New
 XmlSchemaEnumerationFacet()
        enumerationLarge.Value = "Large"
        restriction.Facets.Add(enumerationLarge)

        SizeType.Content = restriction

        schema.Items.Add(SizeType)

        ' <xs:element name="Item">
        Dim elementItem As New
 XmlSchemaElement()
        elementItem.Name = "Item"

        ' <xs:complexType>
        Dim complexType As New
 XmlSchemaComplexType()

        ' <xs:attribute name="Size" type="SizeType"/>
        Dim attributeSize As New
 XmlSchemaAttribute()
        attributeSize.Name = "Size"
        attributeSize.SchemaTypeName = New XmlQualifiedName("SizeType",
 "")
        complexType.Attributes.Add(attributeSize)

        elementItem.SchemaType = complexType

        schema.Items.Add(elementItem)

        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

using System;
using System.Xml;
using System.Xml.Schema;

class XMLSchemaExamples
{
    public static void Main()
    {

        XmlSchema schema = new XmlSchema();

        // <xs:simpleType name="SizeType">
        XmlSchemaSimpleType SizeType = new XmlSchemaSimpleType();
        SizeType.Name = "SizeType";

        // <xs:restriction base="xs:string">
        XmlSchemaSimpleTypeRestriction restriction = new XmlSchemaSimpleTypeRestriction();
        restriction.BaseTypeName = new XmlQualifiedName("string",
 "http://www.w3.org/2001/XMLSchema");

        // <xs:enumeration value="Small"/>
        XmlSchemaEnumerationFacet enumerationSmall = new XmlSchemaEnumerationFacet();
        enumerationSmall.Value = "Small";
        restriction.Facets.Add(enumerationSmall);

        // <xs:enumeration value="Medium"/>
        XmlSchemaEnumerationFacet enumerationMedium = new XmlSchemaEnumerationFacet();
        enumerationMedium.Value = "Medium";
        restriction.Facets.Add(enumerationMedium);

        // <xs:enumeration value="Large"/>
        XmlSchemaEnumerationFacet enumerationLarge = new XmlSchemaEnumerationFacet();
        enumerationLarge.Value = "Large";
        restriction.Facets.Add(enumerationLarge);

        SizeType.Content = restriction;

        schema.Items.Add(SizeType);

        // <xs:element name="Item">
        XmlSchemaElement elementItem = new XmlSchemaElement();
        elementItem.Name = "Item";

        // <xs:complexType>
        XmlSchemaComplexType complexType = new XmlSchemaComplexType();

        // <xs:attribute name="Size" type="SizeType"/>
        XmlSchemaAttribute attributeSize = new XmlSchemaAttribute();
        attributeSize.Name = "Size";
        attributeSize.SchemaTypeName = new XmlQualifiedName("SizeType",
 "");
        complexType.Attributes.Add(attributeSize);

        elementItem.SchemaType = complexType;

        schema.Items.Add(elementItem);

        XmlSchemaSet schemaSet = new XmlSchemaSet();
        schemaSet.ValidationEventHandler += new ValidationEventHandler(ValidationCallbackOne);
        schemaSet.Add(schema);
        schemaSet.Compile();

        XmlSchema compiledSchema = null;

        foreach (XmlSchema schema1 in schemaSet.Schemas())
        {
            compiledSchema = schema1;
        }

        XmlNamespaceManager nsmgr = new XmlNamespaceManager(new
 NameTable());
        nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema");
        compiledSchema.Write(Console.Out, nsmgr);
    }

    public static void ValidationCallbackOne(object
 sender, ValidationEventArgs args)
    {

        Console.WriteLine(args.Message);
    }
}

前述のコード例に対して生成される XML ファイルを次に示します。

<?xml version="1.0" encoding="IBM437"?>
<xs:schema  xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:simpleType name="SizeType">
    <xs:restriction base="xs:string">
      <xs:enumeration value="Small"
 />
      <xs:enumeration value="Medium"
 />
      <xs:enumeration value="Large"
 />
    </xs:restriction>
  </xs:simpleType>
  <xs:element name="Item">
    <xs:complexType>
      <xs:attribute name="Size"
 type="SizeType" />
    </xs:complexType>
  </xs:element>
</xs:schema>

継承階層

System.Object
   System.Xml.Schema.XmlSchemaObject
     System.Xml.Schema.XmlSchemaAnnotated
       System.Xml.Schema.XmlSchemaFacet
        System.Xml.Schema.XmlSchemaEnumerationFacet

スレッドセーフ

この型の public static (Visual Basic では Shared) メンバはすべて、スレッドセーフです。インスタンスメンバの場合は、スレッドセーフであるとは限りません。

プラットフォーム

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