XmlSchemaChoice クラス

[アーティクル]
03/28/2008

子の 1 つだけをインスタンスに表示できるようにします。W3C (World Wide Web Consortium) choice (コンポジタ) 要素を表します。

この型のすべてのメンバの一覧については、XmlSchemaChoice メンバを参照してください。

System.Object
   System.Xml.Schema.XmlSchemaObject
      System.Xml.Schema.XmlSchemaAnnotated
         System.Xml.Schema.XmlSchemaParticle
            System.Xml.Schema.XmlSchemaGroupBase
               System.Xml.Schema.XmlSchemaChoice

Public Class XmlSchemaChoice
   Inherits XmlSchemaGroupBase
[C#]
public class XmlSchemaChoice : XmlSchemaGroupBase
[C++]
public __gc class XmlSchemaChoice : public XmlSchemaGroupBase
[JScript]
public class XmlSchemaChoice extends XmlSchemaGroupBase

スレッドセーフ

この型の public static (Visual Basicでは Shared) のすべてのメンバは、マルチスレッド操作で安全に使用できます。インスタンスのメンバの場合は、スレッドセーフであるとは限りません。

使用例

[Visual Basic, C#, C++] choice 要素を作成する例を次に示します。

 
Option Strict
Option Explicit

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

Class XMLSchemaExamples
    Public Shared Sub Main()
        Dim schema As New XmlSchema()
        
        ' <xs:element name="selected"/>
        Dim xeSelected As New XmlSchemaElement()
        xeSelected.Name = "selected"
        schema.Items.Add(xeSelected)
        
        ' <xs:element name="unselected"/>
        Dim xeUnselected As New XmlSchemaElement()
        xeUnselected.Name = "unselected"
        schema.Items.Add(xeUnselected)
        
        ' <xs:element name="dimpled"/>
        Dim xeDimpled As New XmlSchemaElement()
        xeDimpled.Name = "dimpled"
        schema.Items.Add(xeDimpled)
        
        ' <xs:element name="perforated"/>
        Dim xePerforated As New XmlSchemaElement()
        xePerforated.Name = "perforated"
        schema.Items.Add(xePerforated)
        
        ' <xs:complexType name="chadState">
        Dim chadState As New XmlSchemaComplexType()
        schema.Items.Add(chadState)
        chadState.Name = "chadState"
        
        ' <xs:choice minOccurs="1" maxOccurs="1">
        Dim choice As New XmlSchemaChoice()
        chadState.Particle = choice
        choice.MinOccurs = 1
        choice.MaxOccurs = 1
        
        ' <xs:element ref="selected"/>
        Dim elementSelected As New XmlSchemaElement()
        choice.Items.Add(elementSelected)
        elementSelected.RefName = New XmlQualifiedName("selected")
        
        ' <xs:element ref="unselected"/>
        Dim elementUnselected As New XmlSchemaElement()
        choice.Items.Add(elementUnselected)
        elementUnselected.RefName = New XmlQualifiedName("unselected")
        
        ' <xs:element ref="dimpled"/>
        Dim elementDimpled As New XmlSchemaElement()
        choice.Items.Add(elementDimpled)
        elementDimpled.RefName = New XmlQualifiedName("dimpled")
        
        ' <xs:element ref="perforated"/>
        Dim elementPerforated As New XmlSchemaElement()
        choice.Items.Add(elementPerforated)
        elementPerforated.RefName = New XmlQualifiedName("perforated")
        
        schema.Compile(AddressOf ValidationCallbackOne)
        Dim nsmgr As New XmlNamespaceManager(New NameTable())
        nsmgr.AddNamespace("xs", "http://www.w3.org/2001/XMLSchema")
        schema.Write(Console.Out, nsmgr)
    End Sub 'Main
    
    
    Public Shared Sub ValidationCallbackOne(sender As Object, args As ValidationEventArgs)

        Console.WriteLine(args.Message)
    End Sub 'ValidationCallbackOne
End Class 'XMLSchemaExamples

[C#] 
using System;
using System.Xml;  
using System.Xml.Schema;

class XMLSchemaExamples {
    public static void Main() {
 
        XmlSchema schema = new XmlSchema();
    
        // <xs:element name="selected"/>
        XmlSchemaElement xeSelected = new XmlSchemaElement();
        xeSelected.Name = "selected";
        schema.Items.Add(xeSelected);

        // <xs:element name="unselected"/>
        XmlSchemaElement xeUnselected = new XmlSchemaElement();
        xeUnselected.Name = "unselected";
        schema.Items.Add(xeUnselected);
        
        // <xs:element name="dimpled"/>
        XmlSchemaElement xeDimpled = new XmlSchemaElement();
        xeDimpled.Name = "dimpled";
        schema.Items.Add(xeDimpled);

        // <xs:element name="perforated"/>
        XmlSchemaElement xePerforated = new XmlSchemaElement();
        xePerforated.Name = "perforated";
        schema.Items.Add(xePerforated);

        // <xs:complexType name="chadState">
        XmlSchemaComplexType chadState = new XmlSchemaComplexType();
        schema.Items.Add(chadState);
        chadState.Name = "chadState";
        
        // <xs:choice minOccurs="1" maxOccurs="1">
        XmlSchemaChoice choice = new XmlSchemaChoice();
        chadState.Particle = choice;
        choice.MinOccurs = 1;
        choice.MaxOccurs = 1;
        
        // <xs:element ref="selected"/>
        XmlSchemaElement elementSelected = new XmlSchemaElement();
        choice.Items.Add(elementSelected);
        elementSelected.RefName = new XmlQualifiedName("selected");

        // <xs:element ref="unselected"/>
        XmlSchemaElement elementUnselected = new XmlSchemaElement();
        choice.Items.Add(elementUnselected);
        elementUnselected.RefName = new XmlQualifiedName("unselected");

        // <xs:element ref="dimpled"/>
        XmlSchemaElement elementDimpled = new XmlSchemaElement();
        choice.Items.Add(elementDimpled);
        elementDimpled.RefName = new XmlQualifiedName("dimpled");

        // <xs:element ref="perforated"/>
        XmlSchemaElement elementPerforated = new XmlSchemaElement();
        choice.Items.Add(elementPerforated);
        elementPerforated.RefName = new XmlQualifiedName("perforated");

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

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

        Console.WriteLine(args.Message);
    }
}

[C++] 
#using <mscorlib.dll>
#using <System.Xml.dll>
using namespace System;
using namespace System::Xml;  
using namespace System::Xml::Schema;

__gc class XMLSchemaExamples {
public:
    static void main() {
 
        XmlSchema* schema = new XmlSchema();
    
        // <xs:element name="selected"/>
        XmlSchemaElement* xeSelected = new XmlSchemaElement();
        xeSelected->Name = S"selected";
        schema->Items->Add(xeSelected);

        // <xs:element name="unselected"/>
        XmlSchemaElement* xeUnselected = new XmlSchemaElement();
        xeUnselected->Name = S"unselected";
        schema->Items->Add(xeUnselected);
        
        // <xs:element name="dimpled"/>
        XmlSchemaElement* xeDimpled = new XmlSchemaElement();
        xeDimpled->Name = S"dimpled";
        schema->Items->Add(xeDimpled);

        // <xs:element name="perforated"/>
        XmlSchemaElement* xePerforated = new XmlSchemaElement();
        xePerforated->Name = S"perforated";
        schema->Items->Add(xePerforated);

        // <xs:complexType name="chadState">
        XmlSchemaComplexType* chadState = new XmlSchemaComplexType();
        schema->Items->Add(chadState);
        chadState->Name = S"chadState";
        
        // <xs:choice minOccurs="1" maxOccurs="1">
        XmlSchemaChoice* choice = new XmlSchemaChoice();
        chadState->Particle = choice;
        choice->MinOccurs = 1;
        choice->MaxOccurs = 1;
        
        // <xs:element ref="selected"/>
        XmlSchemaElement* elementSelected = new XmlSchemaElement();
        choice->Items->Add(elementSelected);
        elementSelected->RefName = new XmlQualifiedName(S"selected");

        // <xs:element ref="unselected"/>
        XmlSchemaElement* elementUnselected = new XmlSchemaElement();
        choice->Items->Add(elementUnselected);
        elementUnselected->RefName = new XmlQualifiedName(S"unselected");

        // <xs:element ref="dimpled"/>
        XmlSchemaElement* elementDimpled = new XmlSchemaElement();
        choice->Items->Add(elementDimpled);
        elementDimpled->RefName = new XmlQualifiedName(S"dimpled");

        // <xs:element ref="perforated"/>
        XmlSchemaElement* elementPerforated = new XmlSchemaElement();
        choice->Items->Add(elementPerforated);
        elementPerforated->RefName = new XmlQualifiedName(S"perforated");

        schema->Compile(new ValidationEventHandler(0, ValidationCallbackOne));
     XmlNamespaceManager* nsmgr = new XmlNamespaceManager(new NameTable());
        nsmgr->AddNamespace(S"xs", S"http://www.w3.org/2001/XMLSchema");
        schema->Write(Console::Out,nsmgr);
    }

    static void ValidationCallbackOne(Object* /*sender*/, ValidationEventArgs* args) {

        Console::WriteLine(args->Message);
    }
};

int main()
{
    XMLSchemaExamples::main();
}

[Visual Basic, C#, C++] 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:element name="selected"/>
    <xs:element name="unselected"/>
    <xs:element name="dimpled"/>
    <xs:element name="perforated"/>
    
    <xs:complexType name="chadState">
        <xs:choice minOccurs="1" maxOccurs="1">
            <xs:element ref="selected"/>
            <xs:element ref="unselected"/>
            <xs:element ref="dimpled"/>
            <xs:element ref="perforated"/>
        </xs:choice>
    </xs:complexType>
</xs:schema>

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタボタンをクリックします。

必要条件

名前空間: System.Xml.Schema

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ

アセンブリ: System.Xml (System.Xml.dll 内)

参照

XmlSchemaChoice メンバ | System.Xml.Schema 名前空間

次の方法で共有

XmlSchemaChoice クラス

スレッドセーフ

使用例

必要条件

参照

その他のリソース