XmlArrayItemAttribute クラス
アセンブリ: System.Xml (system.xml.dll 内)

<AttributeUsageAttribute(AttributeTargets.Property Or AttributeTargets.Field Or AttributeTargets.Parameter Or AttributeTargets.ReturnValue, AllowMultiple:=True)> _ Public Class XmlArrayItemAttribute Inherits Attribute
[AttributeUsageAttribute(AttributeTargets.Property|AttributeTargets.Field|AttributeTargets.Parameter|AttributeTargets.ReturnValue, AllowMultiple=true)] public class XmlArrayItemAttribute : Attribute
[AttributeUsageAttribute(AttributeTargets::Property|AttributeTargets::Field|AttributeTargets::Parameter|AttributeTargets::ReturnValue, AllowMultiple=true)] public ref class XmlArrayItemAttribute : public Attribute

XmlArrayItemAttribute は、XmlSerializer がオブジェクトをシリアル化または逆シリアル化する方法を制御する一連の属性の 1 つです。類似する属性の完全な一覧については、「XML シリアル化を制御する属性」を参照してください。
XmlArrayItemAttribute は、配列を返したり配列へのアクセスを提供したりする任意のパブリックな読み取り/書き込みメンバに適用できます。たとえば、オブジェクトの配列を返すフィールド、コレクション、ArrayList、または IEnumerable インターフェイスを実装する任意のクラスがこれに該当します。
XmlArrayItemAttribute はポリモーフィズムをサポートしています。つまり XmlSerializer によって派生オブジェクトを配列に追加できます。たとえば、Animal という基本クラスから派生した Mammal クラスがあるとします。また、MyAnimals というクラスには Animal オブジェクトの配列を返すフィールドがあるとします。XmlSerializer により Animal 型および Mammal 型の両方をシリアル化するには、使用可能な 2 つの型のいずれか一方を指定して、フィールドに XmlArrayItemAttribute を 2 回適用します。
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XmlArrayItemAttribute または XmlElementAttribute の複数のインスタンスを適用して、配列に挿入できるオブジェクトの型を指定できます。 |

Employee オブジェクトの配列を返す Employees というフィールドがある Group 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ます。これにより、XmlSerializer に対して、基本クラス (Employee) 型と派生クラス (Manager) 型の両方のオブジェクトをシリアル化された配列に挿入するように指示します。
Option Explicit Option Strict Imports System Imports System.IO Imports System.Xml.Serialization Imports Microsoft.VisualBasic Public Class Group ' The XmlArrayItemAttribute allows the XmlSerializer to insert ' both the base type (Employee) and derived type (Manager) ' into serialized arrays. <XmlArrayItem(GetType(Manager)), _ XmlArrayItem(GetType(Employee))> _ Public Employees() As Employee ' Use the XmlArrayItemAttribute to specify types allowed ' in an array of Object items. <XmlArray(), _ XmlArrayItem(GetType(Integer), ElementName := "MyNumber"), _ XmlArrayItem(GetType(String), ElementName := "MyString"), _ XmlArrayItem(GetType(Manager))> _ Public ExtraInfo() As Object End Class Public Class Employee Public Name As String End Class Public Class Manager Inherits Employee Public Level As Integer End Class Public Class Run Public Shared Sub Main() Dim test As New Run() test.SerializeObject("TypeDoc.xml") test.DeserializeObject("TypeDoc.xml") End Sub Public Sub SerializeObject(ByVal filename As String) ' Creates a new XmlSerializer. Dim s As New XmlSerializer(GetType(Group)) ' Writing the XML file to disk requires a TextWriter. Dim writer As New StreamWriter(filename) Dim group As New Group() Dim manager As New Manager() Dim emp1 As New Employee() Dim emp2 As New Employee() manager.Name = "Consuela" manager.Level = 3 emp1.Name = "Seiko" emp2.Name = "Martina" Dim emps() As Employee = {manager, emp1, emp2} group.Employees = emps ' Creates an int and a string and assigns to ExtraInfo. group.ExtraInfo = New Object() {43, "Extra", manager} ' Serializes the object, and closes the StreamWriter. s.Serialize(writer, group) writer.Close() End Sub Public Sub DeserializeObject(ByVal filename As String) Dim fs As New FileStream(filename, FileMode.Open) Dim x As New XmlSerializer(GetType(Group)) Dim g As Group = CType(x.Deserialize(fs), Group) Console.WriteLine("Members:") Dim e As Employee For Each e In g.Employees Console.WriteLine(ControlChars.Tab & e.Name) Next e End Sub End Class
using System; using System.IO; using System.Xml.Serialization; public class Group { /* The XmlArrayItemAttribute allows the XmlSerializer to insert both the base type (Employee) and derived type (Manager) into serialized arrays. */ [XmlArrayItem(typeof(Manager)), XmlArrayItem(typeof(Employee))] public Employee[] Employees; /* Use the XmlArrayItemAttribute to specify types allowed in an array of Object items. */ [XmlArray] [XmlArrayItem (typeof(int), ElementName = "MyNumber"), XmlArrayItem (typeof(string), ElementName = "MyString"), XmlArrayItem(typeof(Manager))] public object [] ExtraInfo; } public class Employee { public string Name; } public class Manager:Employee{ public int Level; } public class Run { public static void Main() { Run test = new Run(); test.SerializeObject("TypeDoc.xml"); test.DeserializeObject("TypeDoc.xml"); } public void SerializeObject(string filename) { // Creates a new XmlSerializer. XmlSerializer s = new XmlSerializer(typeof(Group)); // Writing the XML file to disk requires a TextWriter. TextWriter writer = new StreamWriter(filename); Group group = new Group(); Manager manager = new Manager(); Employee emp1 = new Employee(); Employee emp2 = new Employee(); manager.Name = "Consuela"; manager.Level = 3; emp1.Name = "Seiko"; emp2.Name = "Martina"; Employee [] emps = new Employee[3]{manager, emp1, emp2}; group.Employees = emps; // Creates an int and a string and assigns to ExtraInfo. group.ExtraInfo = new Object[3]{43, "Extra", manager}; // Serializes the object, and closes the StreamWriter. s.Serialize(writer, group); writer.Close(); } public void DeserializeObject(string filename) { FileStream fs = new FileStream(filename, FileMode.Open); XmlSerializer x = new XmlSerializer(typeof(Group)); Group g = (Group) x.Deserialize(fs); Console.WriteLine("Members:"); foreach(Employee e in g.Employees) { Console.WriteLine("\t" + e.Name); } } }
#using <System.Xml.dll> #using <System.dll> using namespace System; using namespace System::IO; using namespace System::Xml::Serialization; public ref class Employee { public: String^ Name; }; public ref class Manager: public Employee { public: int Level; }; public ref class Group { public: /* The XmlArrayItemAttribute allows the XmlSerializer to insert both the base type (Employee) and derived type (Manager) into serialized arrays. */ [XmlArrayItem(Manager::typeid), XmlArrayItem(Employee::typeid)] array<Employee^>^Employees; /* Use the XmlArrayItemAttribute to specify types allowed in an array of Object items. */ [XmlArray] [XmlArrayItem(Int32::typeid, ElementName="MyNumber"), XmlArrayItem(String::typeid, ElementName="MyString"), XmlArrayItem(Manager::typeid)] array<Object^>^ExtraInfo; }; void SerializeObject( String^ filename ) { // Creates a new XmlSerializer. XmlSerializer^ s = gcnew XmlSerializer( Group::typeid ); // Writing the XML file to disk requires a TextWriter. TextWriter^ writer = gcnew StreamWriter( filename ); Group^ group = gcnew Group; Manager^ manager = gcnew Manager; Employee^ emp1 = gcnew Employee; Employee^ emp2 = gcnew Employee; manager->Name = "Consuela"; manager->Level = 3; emp1->Name = "Seiko"; emp2->Name = "Martina"; array<Employee^>^emps = {manager,emp1,emp2}; group->Employees = emps; // Creates an int and a string and assigns to ExtraInfo. array<Object^>^temp = {43,"Extra",manager}; group->ExtraInfo = temp; // Serializes the object, and closes the StreamWriter. s->Serialize( writer, group ); writer->Close(); } void DeserializeObject( String^ filename ) { FileStream^ fs = gcnew FileStream( filename,FileMode::Open ); XmlSerializer^ x = gcnew XmlSerializer( Group::typeid ); Group^ g = dynamic_cast<Group^>(x->Deserialize( fs )); Console::WriteLine( "Members:" ); System::Collections::IEnumerator^ myEnum = g->Employees->GetEnumerator(); while ( myEnum->MoveNext() ) { Employee^ e = safe_cast<Employee^>(myEnum->Current); Console::WriteLine( "\t{0}", e->Name ); } } int main() { SerializeObject( "TypeDoc.xml" ); DeserializeObject( "TypeDoc.xml" ); }
import System.*; import System.IO.*; import System.Xml.Serialization.*; public class Group { /* The XmlArrayItemAttribute allows the XmlSerializer to insert both the base type (Employee) and derived type (Manager) into serialized arrays. */ /** @attribute XmlArrayItem(Manager.class) @attribute XmlArrayItem(Employee.class) */ public Employee employees[]; /* Use the XmlArrayItemAttribute to specify types allowed in an array of Object items. */ /** @attribute XmlArray() */ /** @attribute XmlArrayItem(int.class, ElementName = "MyNumber") @attribute XmlArrayItem(String.class, ElementName = "MyString") @attribute XmlArrayItem(Manager.class) */ public Object extraInfo[]; } //Group public class Employee { public String name; } //Employee public class Manager extends Employee { public int level; } //Manager public class Run { public static void main(String[] args) { Run test = new Run(); test.SerializeObject("TypeDoc.xml"); test.DeserializeObject("TypeDoc.xml"); } //main public void SerializeObject(String fileName) { // Creates a new XmlSerializer. XmlSerializer s = new XmlSerializer(Group.class.ToType()); // Writing the XML file to disk requires a TextWriter. TextWriter writer = new StreamWriter(fileName); Group group = new Group(); Manager manager = new Manager(); Employee emp1 = new Employee(); Employee emp2 = new Employee(); manager.name = "Consuela"; manager.level = 3; emp1.name = "Seiko"; emp2.name = "Martina"; Employee emps[] = new Employee[] { manager, emp1, emp2 }; group.employees = emps; // Creates an int and a string and assigns to ExtraInfo. group.extraInfo = new Object[] { (Int32)43, "Extra", manager }; // Serializes the object, and closes the StreamWriter. s.Serialize(writer, group); writer.Close(); } //SerializeObject public void DeserializeObject(String fileName) { FileStream fs = new FileStream(fileName, FileMode.Open); XmlSerializer x = new XmlSerializer(Group.class.ToType()); Group g = (Group)(x.Deserialize(fs)); Console.WriteLine("Members:"); for (int iCtr = 0; iCtr < g.employees.length; iCtr++) { Employee e = (Employee)g.employees.get_Item(iCtr); Console.WriteLine("\t" + e.name); } } //DeserializeObject } //Run

System.Attribute
System.Xml.Serialization.XmlArrayItemAttribute


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。


XmlArrayItemAttribute コンストラクタ ()
アセンブリ: System.Xml (system.xml.dll 内)


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

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。


XmlArrayItemAttribute コンストラクタ (String, Type)
アセンブリ: System.Xml (system.xml.dll 内)

Dim elementName As String Dim type As Type Dim instance As New XmlArrayItemAttribute(elementName, type)

このオーバーロードは、ElementName プロパティと Type プロパティを設定します。
生成された XML 要素の名前をメンバの識別子と異なる名前にする場合は、このオーバーロードを使用します。
名前空間がある XML ドキュメントでは、1 つの要素名の複数バージョンを保持できます。詳細については、ElementName プロパティのトピックを参照してください。

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。属性を適用するときに、この例では elementName パラメータを使用して ElementName プロパティを設定し、type パラメータを使用して Type プロパティを設定しています。
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 <XmlArray(), _ XmlArrayItem("Transport", GetType(Vehicle)), _ XmlArrayItem("Automobile", GetType(Car))> _ Public MyVehicles() As Vehicle End Class Public Class Run Public Shared Sub Main() Dim test As New Run() test.SerializeObject("XmlArrayItem4.xml") test.DeserializeObject("XmlArrayItem4.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) Dim myTransportation As New Transportation() Dim myVehicle As New Vehicle() myVehicle.id = "A12345" Dim myCar As New Car() myCar.id = "Car 34" myCar.Maker = "FamousCarMaker" Dim myVehicles() As Vehicle = {myVehicle, myCar} myTransportation.MyVehicles = myVehicles ' Serializes the object, and closes the StreamWriter. MySerializer.Serialize(myTextWriter, myTransportation) myTextWriter.Close() End Sub Private Sub DeserializeObject(ByVal filename As String) ' Creates an XmlSerializer. 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 { [XmlArray] [XmlArrayItem("Transport", typeof(Vehicle)), XmlArrayItem("Automobile", typeof(Car))] public Vehicle[] MyVehicles; } public class Run { public static void Main() { Run test= new Run(); test.SerializeObject("XmlArrayItem4.xml"); test.DeserializeObject("XmlArrayItem4.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); Transportation myTransportation = new Transportation(); Vehicle myVehicle= new Vehicle() ; myVehicle.id = "A12345"; Car myCar = new Car(); myCar.id = "Car 34"; myCar.Maker = "FamousCarMaker"; Vehicle [] myVehicles = {myVehicle, myCar}; myTransportation.MyVehicles = myVehicles; // Serializes the object, and closes the StreamWriter. MySerializer.Serialize(myTextWriter, myTransportation); myTextWriter.Close(); } private void DeserializeObject(string filename) { // Creates an XmlSerializer. 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: [XmlArray] [XmlArrayItem("Transport",Vehicle::typeid), XmlArrayItem("Automobile",Car::typeid)] 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 ); Transportation^ myTransportation = gcnew Transportation; Vehicle^ myVehicle = gcnew Vehicle; myVehicle->id = "A12345"; Car^ myCar = gcnew Car; myCar->id = "Car 34"; myCar->Maker = "FamousCarMaker"; array<Vehicle^>^myVehicles = {myVehicle,myCar}; myTransportation->MyVehicles = myVehicles; // Serializes the object, and closes the StreamWriter. MySerializer->Serialize( myTextWriter, myTransportation ); myTextWriter->Close(); } void DeserializeObject( String^ filename ) { // Creates an XmlSerializer. 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( "XmlArrayItem4.xml" ); DeserializeObject( "XmlArrayItem4.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 XmlArray() */ /** @attribute XmlArrayItem("Transport", Vehicle.class) @attribute XmlArrayItem("Automobile", Car.class) */ public Vehicle myVehicles[]; } //Transportation public class Run { public static void main(String[] args) { Run test = new Run(); test.SerializeObject("XmlArrayItem4.xml"); test.DeserializeObject("XmlArrayItem4.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); Transportation myTransportation = new Transportation(); Vehicle myVehicle = new Vehicle(); myVehicle.id = "A12345"; Car myCar = new Car(); myCar.id = "Car 34"; myCar.maker = "FamousCarMaker"; Vehicle myVehiclesObj[] = { myVehicle, myCar }; myTransportation.myVehicles = myVehiclesObj; // Serializes the object, and closes the StreamWriter. mySerializer.Serialize(myTextWriter, myTransportation); myTextWriter.Close(); } //SerializeObject private void DeserializeObject(String fileName) { // Creates an XmlSerializer. 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

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。


XmlArrayItemAttribute コンストラクタ (Type)
アセンブリ: System.Xml (system.xml.dll 内)


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。属性を適用するときに、この例では type パラメータを使用して Type プロパティを設定しています。
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(GetType(Vehicle)), _ XmlArrayItem(GetType(Car))> _ Public MyVehicles() As Vehicle End Class Public Class Run Public Shared Sub Main() Dim test As New Run() test.SerializeObject("XmlArrayItem3.xml") test.DeserializeObject("XmlArrayItem3.xml") End Sub Private Sub SerializeObject(ByVal filename As String) ' Creates an XmlSerializer object. Dim MySerializer As New XmlSerializer(GetType(Transportation)) ' Writing the XML file to disk requires a TextWriter. Dim myTextWriter As New StreamWriter(filename) Dim myTransportation As New Transportation() Dim myVehicle As New Vehicle() myVehicle.id = "A12345" Dim myCar As New Car() myCar.id = "Car 34" myCar.Maker = "FamousCarMaker" Dim myVehicles() As Vehicle = {myVehicle, myCar} myTransportation.MyVehicles = myVehicles ' Serializes the object, and closes the StreamWriter. MySerializer.Serialize(myTextWriter, myTransportation) myTextWriter.Close() End Sub Private Sub DeserializeObject(ByVal filename As String) ' Creates the serializer with the type to deserialize. 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(typeof(Vehicle)), XmlArrayItem(typeof(Car))] public Vehicle[] MyVehicles; } public class Run { public static void Main() { Run test= new Run(); test.SerializeObject("XmlArrayItem3.xml"); test.DeserializeObject("XmlArrayItem3.xml"); } private void SerializeObject(string filename) { // Creates an XmlSerializer. XmlSerializer MySerializer = new XmlSerializer(typeof(Transportation)); // Writing the XML file to disk requires a TextWriter. TextWriter myTextWriter = new StreamWriter(filename); Transportation myTransportation = new Transportation(); Vehicle myVehicle= new Vehicle() ; myVehicle.id = "A12345"; Car myCar = new Car(); myCar.id = "Car 34"; myCar.Maker = "FamousCarMaker"; Vehicle [] myVehicles = {myVehicle, myCar}; myTransportation.MyVehicles = myVehicles; // Serializes the object, and closes the StreamWriter. MySerializer.Serialize(myTextWriter, myTransportation); myTextWriter.Close(); } private void DeserializeObject(string filename) { // Creates the serializer with the type to deserialize. 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(Vehicle::typeid), XmlArrayItem(Car::typeid)] array<Vehicle^>^MyVehicles; }; void SerializeObject( String^ filename ) { // Creates an XmlSerializer. XmlSerializer^ MySerializer = gcnew XmlSerializer( Transportation::typeid ); // Writing the XML file to disk requires a TextWriter. TextWriter^ myTextWriter = gcnew StreamWriter( filename ); Transportation^ myTransportation = gcnew Transportation; Vehicle^ myVehicle = gcnew Vehicle; myVehicle->id = "A12345"; Car^ myCar = gcnew Car; myCar->id = "Car 34"; myCar->Maker = "FamousCarMaker"; array<Vehicle^>^myVehicles = {myVehicle,myCar}; myTransportation->MyVehicles = myVehicles; // Serializes the object, and closes the StreamWriter. MySerializer->Serialize( myTextWriter, myTransportation ); myTextWriter->Close(); } void DeserializeObject( String^ filename ) { // Creates the serializer with the type to deserialize. 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( "XmlArrayItem3.xml" ); DeserializeObject( "XmlArrayItem3.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(Vehicle.class) @attribute XmlArrayItem(Car.class) */ public Vehicle myVehicles[]; } //Transportation public class Run { public static void main(String[] args) { Run test = new Run(); test.SerializeObject("XmlArrayItem3.xml"); test.DeserializeObject("XmlArrayItem3.xml"); } //main private void SerializeObject(String fileName) { // Creates an XmlSerializer. XmlSerializer mySerializer = new XmlSerializer(Transportation.class.ToType()); // Writing the XML file to disk requires a TextWriter. TextWriter myTextWriter = new StreamWriter(fileName); Transportation myTransportation = new Transportation(); Vehicle myVehicle = new Vehicle(); myVehicle.id = "A12345"; Car myCar = new Car(); myCar.id = "Car 34"; myCar.maker = "FamousCarMaker"; Vehicle myVehiclesObj[] = { myVehicle, myCar }; myTransportation.myVehicles = myVehiclesObj; // Serializes the object, and closes the StreamWriter. mySerializer.Serialize(myTextWriter, myTransportation); myTextWriter.Close(); } //SerializeObject private void DeserializeObject(String fileName) { // Creates the serializer with the type to deserialize. 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

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。


XmlArrayItemAttribute コンストラクタ

名前 | 説明 |
---|---|
XmlArrayItemAttribute () | XmlArrayItemAttribute クラスの新しいインスタンスを初期化します。 .NET Compact Framework によってサポートされています。 |
XmlArrayItemAttribute (String) | XmlArrayItemAttribute クラスの新しいインスタンスを初期化し、XML ドキュメントで生成される XML 要素の名前を指定します。 .NET Compact Framework によってサポートされています。 |
XmlArrayItemAttribute (Type) | XmlArrayItemAttribute クラスの新しいインスタンスを初期化し、シリアル化された配列に挿入できる Type を指定します。 .NET Compact Framework によってサポートされています。 |
XmlArrayItemAttribute (String, Type) | XmlArrayItemAttribute クラスの新しいインスタンスを初期化し、XML ドキュメントで生成された XML 要素の名前、および生成された XML ドキュメントに挿入できる Type を指定します。 .NET Compact Framework によってサポートされています。 |

XmlArrayItemAttribute コンストラクタ (String)
アセンブリ: System.Xml (system.xml.dll 内)


このオーバーロードは ElementName プロパティを設定します。
生成された XML 要素の名前をメンバの識別子と異なる名前にする場合は、このオーバーロードを使用します。
名前空間がある XML ドキュメントでは、1 つの要素名の複数バージョンを保持できます。詳細については、ElementName プロパティのトピックを参照してください。

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。属性を適用するときに、この例では elementName パラメータを使用して ElementName プロパティを設定しています。
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(ElementName := "Transportation"), _ 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("XmlArrayItem2.xml") test.DeserializeObject("XmlArrayItem2.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) Dim myTransportation As New Transportation() Dim myVehicle As New Vehicle() myVehicle.id = "A12345" Dim myCar As New Car() myCar.id = "Car 34" myCar.Maker = "FamousCarMaker" Dim myVehicles() As Vehicle = {myVehicle, myCar} myTransportation.MyVehicles = myVehicles ' Serializes the object, and closes the StreamWriter. MySerializer.Serialize(myTextWriter, myTransportation) myTextWriter.Close() End Sub Private Sub DeserializeObject(ByVal filename As String) ' Create the serializer with the type to deserialize. 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(ElementName = "Transportation"), XmlArrayItem(typeof(Car), ElementName = "Automobile")] public Vehicle[] MyVehicles; } public class Run { public static void Main() { Run test= new Run(); test.SerializeObject("XmlArrayItem2.xml"); test.DeserializeObject("XmlArrayItem2.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); Transportation myTransportation = new Transportation(); Vehicle myVehicle= new Vehicle() ; myVehicle.id = "A12345"; Car myCar = new Car(); myCar.id = "Car 34"; myCar.Maker = "FamousCarMaker"; Vehicle [] myVehicles = {myVehicle, myCar}; myTransportation.MyVehicles = myVehicles; // Serializes the object, and closes the StreamWriter. MySerializer.Serialize(myTextWriter, myTransportation); myTextWriter.Close(); } private void DeserializeObject(string filename) { // Creates the serializer with the type to deserialize. 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(ElementName="Transportation"), 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 ); Transportation^ myTransportation = gcnew Transportation; Vehicle^ myVehicle = gcnew Vehicle; myVehicle->id = "A12345"; Car^ myCar = gcnew Car; myCar->id = "Car 34"; myCar->Maker = "FamousCarMaker"; array<Vehicle^>^myVehicles = {myVehicle,myCar}; myTransportation->MyVehicles = myVehicles; // Serializes the object, and closes the StreamWriter. MySerializer->Serialize( myTextWriter, myTransportation ); myTextWriter->Close(); } void DeserializeObject( String^ filename ) { // Creates the serializer with the type to deserialize. 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( "XmlArrayItem2.xml" ); DeserializeObject( "XmlArrayItem2.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(ElementName = "Transportation") @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("XmlArrayItem2.xml"); test.DeserializeObject("XmlArrayItem2.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); Transportation myTransportation = new Transportation(); Vehicle myVehicle = new Vehicle(); myVehicle.id = "A12345"; Car myCar = new Car(); myCar.id = "Car 34"; myCar.maker = "FamousCarMaker"; Vehicle myVehiclesObj[] = { myVehicle, myCar }; myTransportation.myVehicles = myVehiclesObj; // Serializes the object, and closes the StreamWriter. mySerializer.Serialize(myTextWriter, myTransportation); myTextWriter.Close(); } //SerializeObject private void DeserializeObject(String fileName) { // Creates the serializer with the type to deserialize. 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

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。


XmlArrayItemAttribute プロパティ
XmlArrayItemAttribute メソッド

名前 | 説明 | |
---|---|---|
![]() | Equals | オーバーロードされます。 ( Attribute から継承されます。) |
![]() | GetCustomAttribute | オーバーロードされます。 アセンブリ、モジュール、型のメンバ、またはメソッド パラメータに適用された指定した型のカスタム属性を取得します。 ( Attribute から継承されます。) |
![]() | GetCustomAttributes | オーバーロードされます。 アセンブリ、モジュール、型のメンバ、またはメソッド パラメータに適用されたカスタム属性の配列を取得します。 ( Attribute から継承されます。) |
![]() | GetHashCode | このインスタンスのハッシュ コードを返します。 ( Attribute から継承されます。) |
![]() | GetType | 現在のインスタンスの Type を取得します。 ( Object から継承されます。) |
![]() | IsDefaultAttribute | 派生クラス内でオーバーライドされたときに、このインスタンスの値が派生クラスの既定値かどうかを示します。 ( Attribute から継承されます。) |
![]() | IsDefined | オーバーロードされます。 指定した型のカスタム属性が、アセンブリ、モジュール、型のメンバ、またはメソッド パラメータに適用されているかどうかを判断します。 ( Attribute から継承されます。) |
![]() | Match | 派生クラス内でオーバーライドされたときに、指定したオブジェクトとこのインスタンスが等しいかどうかを示す値を返します。 ( Attribute から継承されます。) |
![]() | ReferenceEquals | 指定した複数の Object インスタンスが同一かどうかを判断します。 ( Object から継承されます。) |
![]() | ToString | 現在の Object を表す String を返します。 ( Object から継承されます。) |

名前 | 説明 | |
---|---|---|
![]() | Finalize | Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 ( Object から継承されます。) |
![]() | MemberwiseClone | 現在の Object の簡易コピーを作成します。 ( Object から継承されます。) |

XmlArrayItemAttribute メンバ
XmlSerializer がシリアル化された配列で配置できる派生型を指定します。
XmlArrayItemAttribute データ型で公開されるメンバを以下の表に示します。



名前 | 説明 | |
---|---|---|
![]() | Equals | オーバーロードされます。 ( Attribute から継承されます。) |
![]() | GetCustomAttribute | オーバーロードされます。 アセンブリ、モジュール、型のメンバ、またはメソッド パラメータに適用された指定した型のカスタム属性を取得します。 (Attribute から継承されます。) |
![]() | GetCustomAttributes | オーバーロードされます。 アセンブリ、モジュール、型のメンバ、またはメソッド パラメータに適用されたカスタム属性の配列を取得します。 (Attribute から継承されます。) |
![]() | GetHashCode | このインスタンスのハッシュ コードを返します。 (Attribute から継承されます。) |
![]() | GetType | 現在のインスタンスの Type を取得します。 (Object から継承されます。) |
![]() | IsDefaultAttribute | 派生クラス内でオーバーライドされたときに、このインスタンスの値が派生クラスの既定値かどうかを示します。 (Attribute から継承されます。) |
![]() | IsDefined | オーバーロードされます。 指定した型のカスタム属性が、アセンブリ、モジュール、型のメンバ、またはメソッド パラメータに適用されているかどうかを判断します。 (Attribute から継承されます。) |
![]() | Match | 派生クラス内でオーバーライドされたときに、指定したオブジェクトとこのインスタンスが等しいかどうかを示す値を返します。 (Attribute から継承されます。) |
![]() | ReferenceEquals | 指定した複数の Object インスタンスが同一かどうかを判断します。 (Object から継承されます。) |
![]() | ToString | 現在の Object を表す String を返します。 (Object から継承されます。) |

名前 | 説明 | |
---|---|---|
![]() | Finalize | Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 (Object から継承されます。) |
![]() | MemberwiseClone | 現在の Object の簡易コピーを作成します。 (Object から継承されます。) |

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