XmlSchemaKeyref クラス

.NET Framework クラス ライブラリ リファレンス

XmlSchemaKeyref クラス

このクラスは、W3C (World Wide Web Consortium) で指定された XML スキーマの keyref 要素を表します。

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 XmlSchemaKeyref
    Inherits XmlSchemaIdentityConstraint

Visual Basic (使用法)

Dim instance As XmlSchemaKeyref

C#

public class XmlSchemaKeyref : XmlSchemaIdentityConstraint

C++

public ref class XmlSchemaKeyref : public
 XmlSchemaIdentityConstraint

J#

public class XmlSchemaKeyref extends XmlSchemaIdentityConstraint

JScript

public class XmlSchemaKeyref extends
 XmlSchemaIdentityConstraint

解説

属性値または要素値 (または値のセット) は、指定した key 要素または unique 要素の値と対応することを指定します。制約名はスキーマ内で一意である必要があります。

使用例

key 要素を作成する例を次に示します。

Visual Basic

Imports System
Imports System.Collections
Imports System.IO
Imports System.Xml
Imports System.Xml.Xsl
Imports System.Xml.Schema

Public Class XmlSchemaObjectGenerator
   
   Private Shared Sub ValidationCallback(sender
 As Object, args As ValidationEventArgs)
      
      If args.Severity = XmlSeverityType.Warning Then
         Console.Write("WARNING: ")
      Else
         If args.Severity = XmlSeverityType.Error Then
            Console.Write("ERROR: ")
         End If 
      End If
      Console.WriteLine(args.Message)
   End Sub 'ValidationCallback
   
   
   
   Public Shared Sub Main()
      
      
      Dim tr As New XmlTextReader("empty.xsd")
      Dim schema As XmlSchema = XmlSchema.Read(tr,
 New ValidationEventHandler(AddressOf ValidationCallback))
      
      schema.ElementFormDefault = XmlSchemaForm.Qualified
      
      schema.TargetNamespace = "http://www.example.com/Report"
      
      If (True) Then
         
         Dim element As New
 XmlSchemaElement()
         element.Name = "purchaseReport"
         
         Dim element_complexType As New
 XmlSchemaComplexType()
         
         Dim element_complexType_sequence As
 New XmlSchemaSequence()
         
         If (True) Then
            
            Dim element_complexType_sequence_element As
 New XmlSchemaElement()
            element_complexType_sequence_element.Name = "region"
            element_complexType_sequence_element.SchemaTypeName = New
 XmlQualifiedName("string", "http://www.w3.org/2001/XMLSchema")
            
            If (True) Then
               
               Dim element_complexType_sequence_element_keyref
 As New XmlSchemaKeyref()
               element_complexType_sequence_element_keyref.Name = "dummy2"
               element_complexType_sequence_element_keyref.Selector = New
 XmlSchemaXPath()
               element_complexType_sequence_element_keyref.Selector.XPath = "r:zip/r:part"
               
               If (True) Then
                  Dim field As New
 XmlSchemaXPath()
                  
                  field.XPath = "@number"
                  element_complexType_sequence_element_keyref.Fields.Add(field)
               End If
               element_complexType_sequence_element_keyref.Refer = New
 XmlQualifiedName("pNumKey", "http://www.example.com/Report")
               element_complexType_sequence_element.Constraints.Add(element_complexType_sequence_element_keyref)
            End If
            element_complexType_sequence.Items.Add(element_complexType_sequence_element)
         End If
         element_complexType.Particle = element_complexType_sequence
         
         If (True) Then
            
            Dim element_complexType_attribute As
 New XmlSchemaAttribute()
            element_complexType_attribute.Name = "periodEnding"
            element_complexType_attribute.SchemaTypeName = New
 XmlQualifiedName("date", "http://www.w3.org/2001/XMLSchema")
            element_complexType.Attributes.Add(element_complexType_attribute)
         End If
         element.SchemaType = element_complexType
         
         If (True) Then
            
            Dim element_key As New
 XmlSchemaKey()
            element_key.Name = "pNumKey"
            element_key.Selector = New XmlSchemaXPath()
            element_key.Selector.XPath = "r:parts/r:part"
            
            If (True) Then
               Dim field As New
 XmlSchemaXPath()
               
               field.XPath = "@number"
               element_key.Fields.Add(field)
            End If
            element.Constraints.Add(element_key)
         End If
         
         schema.Items.Add(element)
      End If
      
      schema.Write(Console.Out)
   End Sub 'Main 
End Class 'XmlSchemaObjectGenerator
 

' Main() 

'XmlSchemaObjectGenerator

C#

using System;
using System.Collections;
using System.IO;
using System.Xml;
using System.Xml.Xsl;
using System.Xml.Schema;

public class XmlSchemaObjectGenerator {
  
  

    private static void
 ValidationCallback(object sender, ValidationEventArgs args ){
  
    if(args.Severity == XmlSeverityType.Warning)
        Console.Write("WARNING: ");
    else if(args.Severity == XmlSeverityType.Error)
        Console.Write("ERROR: ");
  
    Console.WriteLine(args.Message);
    }
                      
            
    public static void Main()
 {
               
         
      XmlTextReader tr = new XmlTextReader("empty.xsd");
        XmlSchema schema = XmlSchema.Read(tr, new ValidationEventHandler(ValidationCallback));
        
            schema.ElementFormDefault = XmlSchemaForm.Qualified;
        
            schema.TargetNamespace = "http://www.example.com/Report";
        
            {
                
        XmlSchemaElement element = new XmlSchemaElement();
        element.Name = "purchaseReport";
        
        XmlSchemaComplexType element_complexType = new XmlSchemaComplexType();
        
        XmlSchemaSequence element_complexType_sequence = new XmlSchemaSequence();
        
            {
                
        XmlSchemaElement element_complexType_sequence_element = new
 XmlSchemaElement();
        element_complexType_sequence_element.Name = "region";
        element_complexType_sequence_element.SchemaTypeName = 
                new XmlQualifiedName("string",
 "http://www.w3.org/2001/XMLSchema")
            ;
        
            {
                
        XmlSchemaKeyref element_complexType_sequence_element_keyref = new
 XmlSchemaKeyref();
        element_complexType_sequence_element_keyref.Name = "dummy2";
        element_complexType_sequence_element_keyref.Selector = new
 XmlSchemaXPath();
            element_complexType_sequence_element_keyref.Selector.XPath = "r:zip/r:part";
        
            {
                XmlSchemaXPath field = new XmlSchemaXPath();
                
                field.XPath = "@number";
                element_complexType_sequence_element_keyref.Fields.Add(field);
            }
        element_complexType_sequence_element_keyref.Refer =  
                new XmlQualifiedName("pNumKey", "http://www.example.com/Report")
            ;
        element_complexType_sequence_element.Constraints.Add(element_complexType_sequence_element_keyref);
            }
        element_complexType_sequence.Items.Add(element_complexType_sequence_element);
            }
        element_complexType.Particle = element_complexType_sequence;
        
            {
                
        XmlSchemaAttribute element_complexType_attribute = new
 XmlSchemaAttribute();
        element_complexType_attribute.Name = "periodEnding";
        element_complexType_attribute.SchemaTypeName = 
                new XmlQualifiedName("date", "http://www.w3.org/2001/XMLSchema")
            ;
        element_complexType.Attributes.Add(element_complexType_attribute);
            }
        element.SchemaType = element_complexType;
        
            {
                
        XmlSchemaKey element_key = new XmlSchemaKey();
        element_key.Name = "pNumKey";
        element_key.Selector = new XmlSchemaXPath();
            element_key.Selector.XPath = "r:parts/r:part";
        
            {
                XmlSchemaXPath field = new XmlSchemaXPath();
                
                field.XPath = "@number";
                element_key.Fields.Add(field);
            }
        element.Constraints.Add(element_key);
            }
        
                schema.Items.Add(element);
            }
        
        schema.Write(Console.Out);

         

    }/* Main() */ 

} 
//XmlSchemaObjectGenerator

C++

#using <System.Xml.dll>
#using <System.dll>

using namespace System;
using namespace System::Collections;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Xsl;
using namespace System::Xml::Schema;
public ref class XmlSchemaObjectGenerator
{
private:
    static void ValidationCallback( Object^
 /*sender*/, ValidationEventArgs^ args )
    {
        if ( args->Severity == XmlSeverityType::Warning )
            Console::Write( "WARNING: " );
        else
            if ( args->Severity == XmlSeverityType::Error )
                Console::Write( "ERROR: " );

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

    // XmlSchemaObjectGenerator
    int main()
    {
        XmlTextReader^ tr = gcnew XmlTextReader( "empty.xsd" );
        XmlSchema^ schema = XmlSchema::Read( tr, gcnew ValidationEventHandler( XmlSchemaObjectGenerator::ValidationCallback
 ) );
        schema->ElementFormDefault = XmlSchemaForm::Qualified;
        schema->TargetNamespace = "http://www.example.com/Report";
        {
            XmlSchemaElement^ element = gcnew XmlSchemaElement;
            element->Name = "purchaseReport";
            XmlSchemaComplexType^ element_complexType = gcnew XmlSchemaComplexType;
            XmlSchemaSequence^ element_complexType_sequence = gcnew XmlSchemaSequence;
            {
                XmlSchemaElement^ element_complexType_sequence_element = gcnew XmlSchemaElement;
                element_complexType_sequence_element->Name = "region";
                element_complexType_sequence_element->SchemaTypeName = gcnew XmlQualifiedName(
 "String*","http://www.w3.org/2001/XMLSchema" );
                {
                    XmlSchemaKeyref^ element_complexType_sequence_element_keyref
 = gcnew XmlSchemaKeyref;
                    element_complexType_sequence_element_keyref->Name = "dummy2";
                    element_complexType_sequence_element_keyref->Selector = gcnew
 XmlSchemaXPath;
                    element_complexType_sequence_element_keyref->Selector->XPath
 = "r:zip/r:part";
                    {
                        XmlSchemaXPath^ field = gcnew XmlSchemaXPath;
                        field->XPath = "@number";
                        element_complexType_sequence_element_keyref->Fields->Add(
 field );
                    }
                    element_complexType_sequence_element_keyref->Refer = gcnew
 XmlQualifiedName( "pNumKey","http://www.example.com/Report"
 );
                    element_complexType_sequence_element->Constraints->Add(
 element_complexType_sequence_element_keyref );
                }
                element_complexType_sequence->Items->Add( element_complexType_sequence_element
 );
            }
            element_complexType->Particle = element_complexType_sequence;
            {
                XmlSchemaAttribute^ element_complexType_attribute = gcnew XmlSchemaAttribute;
                element_complexType_attribute->Name = "periodEnding";
                element_complexType_attribute->SchemaTypeName = gcnew XmlQualifiedName(
 "date","http://www.w3.org/2001/XMLSchema" );
                element_complexType->Attributes->Add( element_complexType_attribute
 );
            }
            element->SchemaType = element_complexType;
            {
                XmlSchemaKey^ element_key = gcnew XmlSchemaKey;
                element_key->Name = "pNumKey";
                element_key->Selector = gcnew XmlSchemaXPath;
                element_key->Selector->XPath = "r:parts/r:part";
                {
                    XmlSchemaXPath^ field = gcnew XmlSchemaXPath;
                    field->XPath = "@number";
                    element_key->Fields->Add( field );
                }
                element->Constraints->Add( element_key );
            }
            schema->Items->Add( element );
        }
        schema->Write( Console::Out );

        return 0;
    } // main
};

J#

import System.*;
import System.Collections.*;
import System.IO.*;
import System.Xml.*;
import System.Xml.Xsl.*;
import System.Xml.Schema.*;

public class XmlSchemaObjectGenerator
 {        
    private static void
 ValidationCallback(Object sender,
        ValidationEventArgs args)
    {
        if (args.get_Severity().Equals(XmlSeverityType.Warning))
 {
            Console.Write("WARNING: ");
        }
        else {        
            if (args.get_Severity().Equals(XmlSeverityType.Error))
 {
                Console.Write("ERROR: ");
            }
        } 
        Console.WriteLine(args.get_Message());
    } //ValidationCallback

    public static void main(String[]
 args)
    {
        XmlTextReader tr = new XmlTextReader("empty.xsd");
        XmlSchema schema = XmlSchema.Read
            (tr, new ValidationEventHandler(ValidationCallback));
        schema.set_ElementFormDefault(XmlSchemaForm.Qualified);
        schema.set_TargetNamespace("http://www.example.com/Report");
        {
            XmlSchemaElement element = new XmlSchemaElement();
            element.set_Name("purchaseReport");
            XmlSchemaComplexType elementComplexType =  
                new XmlSchemaComplexType();
            XmlSchemaSequence elementComplexTypeSequence = 
                new XmlSchemaSequence();
            {
                XmlSchemaElement elementComplexTypeSequenceElement = 
                    new XmlSchemaElement();
                elementComplexTypeSequenceElement.set_Name("region");
                elementComplexTypeSequenceElement.set_SchemaTypeName
                    (new XmlQualifiedName("string",
 
                    "http://www.w3.org/2001/XMLSchema"));
                {
                    XmlSchemaKeyref 
                        elementComplexTypeSequenceElementKeyref = 
                        new XmlSchemaKeyref();
                    elementComplexTypeSequenceElementKeyref.set_Name
                        ("dummy2");
                    elementComplexTypeSequenceElementKeyref.set_Selector
                        (new XmlSchemaXPath());
                    elementComplexTypeSequenceElementKeyref.get_Selector()
                        .set_XPath("r:zip/r:part");
                    {
                        XmlSchemaXPath field = new XmlSchemaXPath();
                        field.set_XPath("@number");
                        elementComplexTypeSequenceElementKeyref
                            .get_Fields().Add(field);
                    }
                    elementComplexTypeSequenceElementKeyref.set_Refer
                        (new XmlQualifiedName("pNumKey",
 
                        "http://www.example.com/Report"));
                    elementComplexTypeSequenceElement.get_Constraints()
                        .Add(elementComplexTypeSequenceElementKeyref);
                }
                elementComplexTypeSequence.get_Items().Add
                    (elementComplexTypeSequenceElement);
            }
            elementComplexType.set_Particle(elementComplexTypeSequence);
            {
                XmlSchemaAttribute elementComplexTypeAttribute = 
                    new XmlSchemaAttribute();
                elementComplexTypeAttribute.set_Name("periodEnding");
                elementComplexTypeAttribute.set_SchemaTypeName
                    (new XmlQualifiedName("date", 
                    "http://www.w3.org/2001/XMLSchema"));
                elementComplexType.get_Attributes().Add
                    (elementComplexTypeAttribute);
            }
            element.set_SchemaType(elementComplexType);
            {
                XmlSchemaKey elementKey = new XmlSchemaKey();
                elementKey.set_Name("pNumKey");
                elementKey.set_Selector(new XmlSchemaXPath());
                elementKey.get_Selector().set_XPath("r:parts/r:part");
                {
                    XmlSchemaXPath field = new XmlSchemaXPath();
                    field.set_XPath("@number");
                    elementKey.get_Fields().Add(field);
                }
                element.get_Constraints().Add(elementKey);
            }
            schema.get_Items().Add(element);
        }
        schema.Write(Console.get_Out());
    } //main 
} //XmlSchemaObjectGenerator 

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:r="http://www.example.com/Report"
 elementFormDefault="qualified" targetNamespace="http://www.example.com/Report"
 xmlns:xs="http://www.w3.org/2001/XMLSchema">
  <xs:element name="purchaseReport">
    <xs:complexType>
      <xs:sequence>
        <xs:element name="region"
 type="xs:string">
          <xs:keyref name="dummy2"
 refer="r:pNumKey">
            <xs:selector xpath="r:zip/r:part"
 />
            <xs:field xpath="@number"
 />
          </xs:keyref>
        </xs:element>
      </xs:sequence>
      <xs:attribute name="periodEnding"
 type="xs:date" />
    </xs:complexType>
    <xs:key name="pNumKey">
      <xs:selector xpath="r:parts/r:part"
 />
      <xs:field xpath="@number"
 />
    </xs:key>
  </xs:element>
</xs:schema>

継承階層

System.Object
   System.Xml.Schema.XmlSchemaObject
     System.Xml.Schema.XmlSchemaAnnotated
       System.Xml.Schema.XmlSchemaIdentityConstraint
        System.Xml.Schema.XmlSchemaKeyref

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

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0
.NET Compact Framework
サポート対象 : 2.0

参照

関連項目
XmlSchemaKeyref メンバ
System.Xml.Schema 名前空間