XmlArrayItemAttribute クラスの新しいインスタンスを初期化します。
名前空間: System.Xml.Serialization
アセンブリ: System.Xml (system.xml.dll 内)
構文
'宣言
Public Sub New
'使用
Dim instance As New XmlArrayItemAttribute
public XmlArrayItemAttribute ()
public:
XmlArrayItemAttribute ()
public XmlArrayItemAttribute ()
public function XmlArrayItemAttribute ()
使用例
Vehicle オブジェクトの配列を返す MyVehicles というフィールドがある Transportation というクラスをシリアル化する例を次に示します。この例では、XmlArrayItemAttribute をフィールドに適用し、Vehicle クラスから派生した Car クラスのインスタンスを XmlSerializer が配列に挿入できるようにします。
Option Explicit
Option Strict
Imports System
Imports System.IO
Imports System.Xml
Imports System.Xml.Serialization
Public Class Vehicle
Public id As String
End Class
Public Class Car
Inherits Vehicle
Public Maker As String
End Class
Public Class Transportation
<XmlArrayItem(), _
XmlArrayItem(GetType(Car), ElementName := "Automobile")> _
Public MyVehicles() As Vehicle
End Class
Public Class Run
Public Shared Sub Main()
Dim test As New Run()
test.SerializeObject("XmlArrayItem1.xml")
test.DeserializeObject("XmlArrayItem1.xml")
End Sub
Private Sub SerializeObject(ByVal filename As String)
' Creates an XmlSerializer for the Transportation class.
Dim MySerializer As New XmlSerializer(GetType(Transportation))
' Writing the XML file to disk requires a TextWriter.
Dim myTextWriter As New StreamWriter(filename)
' Creates the object to serialize.
Dim myTransportation As New Transportation()
' Creates objects to add to the array.
Dim myVehicle As New Vehicle()
myVehicle.id = "A12345"
Dim myCar As New Car()
myCar.id = "Car 34"
myCar.Maker = "FamousCarMaker"
myTransportation.MyVehicles = New Vehicle() {myVehicle, myCar}
' Serializes the object, and closes the StreamWriter.
MySerializer.Serialize(myTextWriter, myTransportation)
myTextWriter.Close()
End Sub
Private Sub DeserializeObject(ByVal filename As String)
' Create an XmlSerializer instance.
Dim mySerializer As New XmlSerializer(GetType(Transportation))
Dim myFileStream As New FileStream(filename, FileMode.Open)
Dim myTransportation As Transportation = _
CType(mySerializer.Deserialize(myFileStream), Transportation)
Dim i As Integer
For i = 0 To myTransportation.MyVehicles.Length - 1
Console.WriteLine(myTransportation.MyVehicles(i).id)
Next i
End Sub
End Class
using System;
using System.IO;
using System.Xml;
using System.Xml.Serialization;
public class Vehicle
{
public string id;
}
public class Car:Vehicle
{
public string Maker;
}
public class Transportation
{
[XmlArrayItem(),
XmlArrayItem(typeof(Car), ElementName = "Automobile")]
public Vehicle[] MyVehicles;
}
public class Run
{
public static void Main()
{
Run test = new Run();
test.SerializeObject("XmlArrayItem1.xml");
test.DeserializeObject("XmlArrayItem1.xml");
}
private void SerializeObject(string filename){
// Creates an XmlSerializer for the Transportation class.
XmlSerializer MySerializer = new XmlSerializer(typeof(Transportation));
// Writing the XML file to disk requires a TextWriter.
TextWriter myTextWriter = new StreamWriter(filename);
// Creates the object to serialize.
Transportation myTransportation = new Transportation();
// Creates objects to add to the array.
Vehicle myVehicle= new Vehicle() ;
myVehicle.id = "A12345";
Car myCar = new Car();
myCar.id = "Car 34";
myCar.Maker = "FamousCarMaker";
myTransportation.MyVehicles =
new Vehicle[2] {myVehicle, myCar};
// Serializes the object, and closes the StreamWriter.
MySerializer.Serialize(myTextWriter, myTransportation);
myTextWriter.Close();
}
private void DeserializeObject(string filename)
{
// Creates an XmlSerializer instance.
XmlSerializer mySerializer = new XmlSerializer(typeof(Transportation));
FileStream myFileStream = new FileStream(filename,FileMode.Open);
Transportation myTransportation =
(Transportation) mySerializer.Deserialize(myFileStream);
for(int i = 0; i < myTransportation.MyVehicles.Length;i++)
{
Console.WriteLine(myTransportation.MyVehicles[i].id);
}
}
}
#using <System.Xml.dll>
#using <System.dll>
using namespace System;
using namespace System::IO;
using namespace System::Xml;
using namespace System::Xml::Serialization;
public ref class Vehicle
{
public:
String^ id;
};
public ref class Car: public Vehicle
{
public:
String^ Maker;
};
public ref class Transportation
{
public:
[XmlArrayItem,
XmlArrayItem(Car::typeid,ElementName="Automobile")]
array<Vehicle^>^MyVehicles;
};
void SerializeObject( String^ filename )
{
// Creates an XmlSerializer for the Transportation class.
XmlSerializer^ MySerializer = gcnew XmlSerializer( Transportation::typeid );
// Writing the XML file to disk requires a TextWriter.
TextWriter^ myTextWriter = gcnew StreamWriter( filename );
// Creates the object to serialize.
Transportation^ myTransportation = gcnew Transportation;
// Creates objects to add to the array.
Vehicle^ myVehicle = gcnew Vehicle;
myVehicle->id = "A12345";
Car^ myCar = gcnew Car;
myCar->id = "Car 34";
myCar->Maker = "FamousCarMaker";
array<Vehicle^>^temp = {myVehicle,myCar};
myTransportation->MyVehicles = temp;
// Serializes the object, and closes the StreamWriter.
MySerializer->Serialize( myTextWriter, myTransportation );
myTextWriter->Close();
}
void DeserializeObject( String^ filename )
{
// Creates an XmlSerializer instance.
XmlSerializer^ mySerializer = gcnew XmlSerializer( Transportation::typeid );
FileStream^ myFileStream = gcnew FileStream( filename,FileMode::Open );
Transportation^ myTransportation = dynamic_cast<Transportation^>(mySerializer->Deserialize( myFileStream ));
for ( int i = 0; i < myTransportation->MyVehicles->Length; i++ )
{
Console::WriteLine( myTransportation->MyVehicles[ i ]->id );
}
}
int main()
{
SerializeObject( "XmlArrayItem1.xml" );
DeserializeObject( "XmlArrayItem1.xml" );
}
import System.*;
import System.IO.*;
import System.Xml.*;
import System.Xml.Serialization.*;
public class Vehicle
{
public String id;
} //Vehicle
public class Car extends Vehicle
{
public String maker;
} //Car
public class Transportation
{
/** @attribute XmlArrayItem()
@attribute XmlArrayItem(Car.class, ElementName = "Automobile")
*/
public Vehicle myVehicles[];
} //Transportation
public class Run
{
public static void main(String[] args)
{
Run test = new Run();
test.SerializeObject("XmlArrayItem1.xml");
test.DeserializeObject("XmlArrayItem1.xml");
} //main
private void SerializeObject(String fileName)
{
// Creates an XmlSerializer for the Transportation class.
XmlSerializer mySerializer =
new XmlSerializer(Transportation.class.ToType());
// Writing the XML file to disk requires a TextWriter.
TextWriter myTextWriter = new StreamWriter(fileName);
// Creates the object to serialize.
Transportation myTransportation = new Transportation();
// Creates objects to add to the array.
Vehicle myVehicle = new Vehicle();
myVehicle.id = "A12345";
Car myCar = new Car();
myCar.id = "Car 34";
myCar.maker = "FamousCarMaker";
myTransportation.myVehicles = new Vehicle[] { myVehicle, myCar };
// Serializes the object, and closes the StreamWriter.
mySerializer.Serialize(myTextWriter, myTransportation);
myTextWriter.Close();
} //SerializeObject
private void DeserializeObject(String fileName)
{
// Creates an XmlSerializer instance.
XmlSerializer mySerializer =
new XmlSerializer(Transportation.class.ToType());
FileStream myFileStream = new FileStream(fileName, FileMode.Open);
Transportation myTransportation =
(Transportation)mySerializer.Deserialize(myFileStream);
for (int i = 0; i < myTransportation.myVehicles.length; i++) {
Console.WriteLine(myTransportation.myVehicles[i].id);
}
} //DeserializeObject
} //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、1.0
参照
関連項目
XmlArrayItemAttribute クラス
XmlArrayItemAttribute メンバ
System.Xml.Serialization 名前空間