XmlArrayAttribute.Form プロパティとは何？わかりやすく解説 Weblio辞書

.NET Framework クラスライブラリリファレンス

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XmlArrayAttribute.Form プロパティ

XmlSerializer によって生成された XML 要素名が、修飾されているかどうかを示す値を取得または設定します。

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

Visual Basic (宣言)

Public Property Form As
 XmlSchemaForm

Visual Basic (使用法)

Dim instance As XmlArrayAttribute
Dim value As XmlSchemaForm

value = instance.Form

instance.Form = value

public XmlSchemaForm Form { get; set;
 }

C++

public:
property XmlSchemaForm Form {
    XmlSchemaForm get ();
    void set (XmlSchemaForm value);
}

/** @property */
public XmlSchemaForm get_Form ()

/** @property */
public void set_Form (XmlSchemaForm value)

JScript

public function get Form
 () : XmlSchemaForm

public function set Form
 (value : XmlSchemaForm)

プロパティ値
XmlSchemaForm 値の 1 つ。既定値は XmlSchemaForm.None です。

解説

Form プロパティは、XML 要素名が限定されているかいないかを判断します。Form プロパティは、W3C (World Wide Web Consortium) のサイト (www.w3.org) で参照できる 1999 年のドキュメント『Namespaces in XML』に準拠しています。

Namespace プロパティに任意の値が設定されている場合は、Form プロパティを XmlSchemaForm.Unqualified に設定しようとすると例外がスローされます。

既定の設定 XmlSchemaForm.None は、XmlSerializer に対し、名前空間が限定されているかどうかを判断するために XML ドキュメントのスキーマを調べるように指示します。スキーマが個別の要素または属性に値を指定しない場合、XmlSerializer は elementFormDefault 値および attributeFormDefault 値を使用して、要素または属性が限定されているかどうかを判断します。次の XML コードはスキーマを示しています。

 <schema elementFormDefault="qualified" 
 attributeFormDefault="unqualified"... >
    <element name="Name"/>
    <attribute name="Number"/>
 </schema>

XmlSerializer がスキーマを読み取ると、Name と Number の両方の Form 値は XmlSchemaForm.None になります。ただし、Name 要素は修飾されますが、Number 要素は修飾されません。

使用例

Enterprises クラスのインスタンスをシリアル化する例を次に示します。2 つの XML 要素のローカル名が同一 (Company) ですが、プリフィックスは異なっています。この例では、Form プロパティが XmlForm.Qualified に設定され、XML インスタンスで限定名が発生するようにします。

Visual Basic

Imports System
Imports System.IO
Imports System.Xml
Imports System.Xml.Schema
Imports System.Xml.Serialization



Public Class Enterprises
    Private mywineries() As Winery
    Private mycompanies() As VacationCompany
    ' Sets the Form property to qualified, and specifies the Namespace.
 
    
    <XmlArray(Form := XmlSchemaForm.Qualified, _
        ElementName := "Company", _
        Namespace := "http://www.cohowinery.com")>
 _
    Public Property Wineries() As
 Winery()
        
        Get
            Return mywineries
        End Get
        Set
            mywineries = value
        End Set
    End Property 
    
    <XmlArray(Form := XmlSchemaForm.Qualified, _
        ElementName := "Company", _
        Namespace := "http://www.treyresearch.com")>
 _ 
    Public Property Companies() As
 VacationCompany()
        
        Get
            Return mycompanies
        End Get
        Set
            mycompanies = value
        End Set
    End Property
End Class 'Enterprises
 
Public Class Winery
    Public Name As String
End Class 'Winery


Public Class VacationCompany
    Public Name As String
End Class 'VacationCompany


Public Class Run
    
    Public Shared Sub Main()
        Dim test As New
 Run()
        test.WriteEnterprises("MyEnterprises.xml")
    End Sub 'Main
    
    
    Public Sub WriteEnterprises(filename As
 String)
        ' Creates an instance of the XmlSerializer class.
        Dim mySerializer As New
 XmlSerializer(GetType(Enterprises))
        ' Writing a file requires a TextWriter.
        Dim writer As New
 StreamWriter(filename)
        
        ' Creates an instance of the XmlSerializerNamespaces class.
        Dim ns As New XmlSerializerNamespaces()
        
        ' Adds namespaces and prefixes for the XML document instance.
        ns.Add("winery", "http://www.cohowinery.com")
        ns.Add("vacationCompany", "http://www.treyresearch.com")
        
        ' Creates an instance of the class that will be serialized.
        Dim myEnterprises As New
 Enterprises()
        
        ' Creates objects and adds to the array. 
        Dim w1 As New Winery()
        w1.Name = "cohowinery"
        Dim myWinery(0) As Winery
        myWinery(0) = w1
        myEnterprises.Wineries = myWinery
        
        Dim com1 As New
 VacationCompany()
        com1.Name = "adventure-works"
        Dim myCompany(0) As VacationCompany
        myCompany(0) = com1
        myEnterprises.Companies = myCompany
        
        ' Serializes the class, and closes the TextWriter.
        mySerializer.Serialize(writer, myEnterprises, ns)
        writer.Close()
    End Sub 'WriteEnterprises
    
    
    Public Sub ReadEnterprises(filename As
 String)
        Dim mySerializer As New
 XmlSerializer(GetType(Enterprises))
        Dim fs As New FileStream(filename,
 FileMode.Open)
        Dim myEnterprises As Enterprises =
 CType(mySerializer.Deserialize(fs), Enterprises)
        
        Dim i As Integer
        For i = 0 To myEnterprises.Wineries.Length
 - 1
            Console.WriteLine(myEnterprises.Wineries(i).Name)
        Next i
        For i = 0 To myEnterprises.Companies.Length
 - 1
            Console.WriteLine(myEnterprises.Companies(i).Name)
        Next i
    End Sub 'ReadEnterprises
End Class 'Run

using System;
using System.IO;
using System.Xml;
using System.Xml.Schema;
using System.Xml.Serialization;
 
public class Enterprises
{
   private Winery[] wineries;
   private VacationCompany[] companies;
   // Sets the Form property to qualified, and specifies the namespace.
 
   [XmlArray(Form = XmlSchemaForm.Qualified, ElementName="Company", 
   Namespace="http://www.cohowinery.com")]
   public Winery[] Wineries{
      get{return wineries;}
      set{wineries = value;}
   }

   [XmlArray(Form = XmlSchemaForm.Qualified, ElementName = "Company", 
   Namespace = "http://www.treyresearch.com")]
   public VacationCompany [] Companies{
      get{return companies;}
      set{companies = value;}
   }
}
 
public class Winery
{
   public string Name;
}
 
public class VacationCompany{
   public string Name;
}
 
public class Run
{
   public static void Main()
   {
      Run test = new Run();
      test.WriteEnterprises("MyEnterprises.xml");
    }
 
   public void WriteEnterprises(string
 filename)
   {
      // Creates an instance of the XmlSerializer class.
      XmlSerializer mySerializer = 
      new XmlSerializer(typeof(Enterprises));
      // Writing file requires a TextWriter.
      TextWriter writer = new StreamWriter(filename);

      // Creates an instance of the XmlSerializerNamespaces class.
      XmlSerializerNamespaces ns = new XmlSerializerNamespaces();

      // Adds namespaces and prefixes for the XML document instance.
      ns.Add("winery", "http://www.cohowinery.com");
      ns.Add("vacationCompany", "http://www.treyresearch.com");

      // Creates an instance of the class that will be serialized.
      Enterprises myEnterprises = new Enterprises();
      
      // Creates objects and adds to the array. 
      Winery w1= new Winery();
      w1.Name = "cohowinery";
      Winery[]myWinery = {w1};
      myEnterprises.Wineries = myWinery;
 
      VacationCompany com1 = new VacationCompany();
      com1.Name = "adventure-works";
      VacationCompany[] myCompany = {com1};
      myEnterprises.Companies = myCompany;

      // Serializes the class, and closes the TextWriter.
      mySerializer.Serialize(writer, myEnterprises, ns);
      writer.Close();
   }

   public void ReadEnterprises(string
 filename)
   {
      XmlSerializer mySerializer = 
      new XmlSerializer(typeof(Enterprises));
      FileStream fs = new FileStream(filename, FileMode.Open);
      Enterprises myEnterprises = (Enterprises) 
      mySerializer.Deserialize(fs);
      
      for(int i = 0; i < myEnterprises.Wineries.Length;i++)
      {
         Console.WriteLine(myEnterprises.Wineries[i].Name);
      }   
      for(int i = 0; i < myEnterprises.Companies.Length;i++)
      {
         Console.WriteLine(myEnterprises.Companies[i].Name);
      }
   }
}

C++

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

using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Schema;
using namespace System::Xml::Serialization;
public ref class Winery
{
public:
   String^ Name;
};

public ref class VacationCompany
{
public:
   String^ Name;
};

public ref class Enterprises
{
private:
   array<Winery^>^wineries;
   array<VacationCompany^>^companies;

public:

   // Sets the Form property to qualified, and specifies the namespace.
 
   [XmlArray(Form=XmlSchemaForm::Qualified,ElementName="Company",
   Namespace="http://www.cohowinery.com")]
   property array<Winery^>^ Wineries 
   {
      array<Winery^>^ get()
      {
         return wineries;
      }
      void set( array<Winery^>^value
 )
      {
         wineries = value;
      }
   }

   [XmlArray(Form=XmlSchemaForm::Qualified,ElementName="Company",
   Namespace="http://www.treyresearch.com")]
   property array<VacationCompany^>^ Companies 
   {
      array<VacationCompany^>^ get()
      {
         return companies;
      }
      void set( array<VacationCompany^>^value
 )
      {
         companies = value;
      }
   }
};

int main()
{
   String^ filename = "MyEnterprises.xml";

   // Creates an instance of the XmlSerializer class.
   XmlSerializer^ mySerializer = gcnew XmlSerializer( Enterprises::typeid );

   // Writing file requires a TextWriter.
   TextWriter^ writer = gcnew StreamWriter( filename );

   // Creates an instance of the XmlSerializerNamespaces class.
   XmlSerializerNamespaces^ ns = gcnew XmlSerializerNamespaces;

   // Adds namespaces and prefixes for the XML document instance.
   ns->Add( "winery", "http://www.cohowinery.com"
 );
   ns->Add( "vacationCompany", "http://www.treyresearch.com"
 );

   // Creates an instance of the class that will be serialized.
   Enterprises^ myEnterprises = gcnew Enterprises;

   // Creates objects and adds to the array. 
   Winery^ w1 = gcnew Winery;
   w1->Name = "cohowinery";
   array<Winery^>^myWinery = {w1};
   myEnterprises->Wineries = myWinery;
   VacationCompany^ com1 = gcnew VacationCompany;
   com1->Name = "adventure-works";
   array<VacationCompany^>^myCompany = {com1};
   myEnterprises->Companies = myCompany;

   // Serializes the class, and closes the TextWriter.
   mySerializer->Serialize( writer, myEnterprises, ns );
   writer->Close();
}

void ReadEnterprises( String^ filename )
{
   XmlSerializer^ mySerializer = gcnew XmlSerializer( Enterprises::typeid );
   FileStream^ fs = gcnew FileStream( filename,FileMode::Open );
   Enterprises^ myEnterprises = dynamic_cast<Enterprises^>(mySerializer->Deserialize(
 fs ));
   for ( int i = 0; i < myEnterprises->Wineries->Length;
 i++ )
   {
      Console::WriteLine( myEnterprises->Wineries[ i ]->Name );
   }
   for ( int i = 0; i < myEnterprises->Companies->Length;
 i++ )
   {
      Console::WriteLine( myEnterprises->Companies[ i ]->Name );
   }
}

import System.*;
import System.IO.*;
import System.Xml.*;
import System.Xml.Schema.*;
import System.Xml.Serialization.*;

public class Enterprises
{
    private Winery wineries[];
    private VacationCompany companies[];

    // Sets the Form property to qualified, and specifies the namespace.
 
    /** @attribute XmlArray(Form = XmlSchemaForm.Qualified, 
        ElementName = "Company", Namespace = "http://www.cohowinery.com")
     */
    /** @property 
     */
    public Winery[] get_Wineries()
    {
        return wineries;
    } //get_Wineries

    /** @property 
     */
    public void set_Wineries(Winery value[])
    {
        wineries = value;
    } //set_Wineries

    /** @attribute XmlArray(Form = XmlSchemaForm.Qualified, 
        ElementName = "Company", Namespace = "http://www.treyresearch.com")
     */
    /** @property 
     */
    public VacationCompany[] get_Companies()
    {
        return companies;
    } //get_Companies

    /** @property 
     */
    public void set_Companies(VacationCompany
 value[])
    {
        companies = value;
    } //set_Companies
} //Enterprises

public class Winery
{
    public String name;
} //Winery

public class VacationCompany
{
    public String name;
} //VacationCompany

public class Run
{
    public static void main(String[]
 args)
    {
        Run test = new Run();
        test.WriteEnterprises("MyEnterprises.xml");
    } //main

    public void WriteEnterprises(String fileName)
    {
        // Creates an instance of the XmlSerializer class.
        XmlSerializer mySerializer = 
            new XmlSerializer(Enterprises.class.ToType());

        // Writing file requires a TextWriter.
        TextWriter writer = new StreamWriter(fileName);

        // Creates an instance of the XmlSerializerNamespaces class.
        XmlSerializerNamespaces ns = new XmlSerializerNamespaces();

        // Adds namespaces and prefixes for the XML document instance.
        ns.Add("winery", "http://www.cohowinery.com");
        ns.Add("vacationCompany", "http://www.treyresearch.com");

        // Creates an instance of the class that will be serialized.
        Enterprises myEnterprises = new Enterprises();

        // Creates objects and adds to the array. 
        Winery w1 = new Winery();
        w1.name = "cohowinery";
        Winery myWinery[] = { w1 };
        myEnterprises.set_Wineries(myWinery);

        VacationCompany com1 = new VacationCompany();
        com1.name = "adventure-works";
        VacationCompany myCompany[] = { com1 };
        myEnterprises.set_Companies(myCompany);

        // Serializes the class, and closes the TextWriter.
        mySerializer.Serialize(writer, myEnterprises, ns);
        writer.Close();
    } //WriteEnterprises

    public void ReadEnterprises(String fileName)
    {
        XmlSerializer mySerializer = 
            new XmlSerializer(Enterprises.class.ToType());
        FileStream fs = new FileStream(fileName, FileMode.Open);
        Enterprises myEnterprises = 
            (Enterprises)(mySerializer.Deserialize(fs));

        for (int i = 0; i < myEnterprises.get_Wineries().length;
 i++) {
            Console.WriteLine(((Winery)myEnterprises.get_Wineries().
                get_Item(i)).name);
        }

        for (int i = 0; i < myEnterprises.get_Companies().length;
 i++) {
            Console.WriteLine(((VacationCompany)myEnterprises.get_Companies().
                get_Item(i)).name);
        }
    } //ReadEnterprises
} //Run

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
XmlArrayAttribute クラス
XmlArrayAttribute メンバ
System.Xml.Serialization 名前空間
XmlSerializer
Serialize
XmlArrayAttribute.ElementName プロパティ
Namespace

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XmlArrayAttribute.Form プロパティとは？わかりやすく解説