XmlArrayItemAttribute.Type プロパティ
アセンブリ: System.Xml (system.xml.dll 内)

配列内で使用できる Type。

Type プロパティを使用して、パブリック フィールドまたはパブリックな読み取り/書き込みプロパティ値についてオーバーライドされる型を指定します。
フィールドまたはプロパティが Object 型の配列を返す場合は、XmlArrayItemAttribute の複数のインスタンスをフィールドまたはプロパティに適用します。各インスタンスの Type プロパティに、配列に挿入できるオブジェクトの型を設定します。
配列にプリミティブ型だけを格納する場合、XmlArrayItemAttribute を適用する必要はありません。既定では、XmlSerializer は個々の値に対してすべて同じ要素名で一連の要素を生成しますが、各要素の型は XML スキーマ データ型に設定されます。コード例を次に示します。
' Visual Basic code Public Class Arrays Public XSDTypes ()As Object= New Object(){"one", 2, 3.0} End Class // C# code public class MyArray{ // No XmlArrayItemAttribute is applied. public object[] XSDTypes= new object[]{"one", 2, 3.2}; }
<?xml version="1.0" encoding="utf-8"?> <Arrays xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"> <XSDTypes> <Object xsi:type="xsd:string">one</Object> <Object xsi:type="xsd:int">2</Object> <Object xsi:type="xsd:double">3</Object> </XSDTypes> </Arrays>
ただし、各プリミティブ型の Type プロパティを指定した場合は、各値の要素名は .NET 型名を使用して生成されます。コード例を次に示します。
' Visual Basic code Public Class Arrays <XmlArrayItem(GetType(String)), _ XmlArrayItem(GetType(Integer)), _ XmlArrayItem(GetType(Double))> _ Public PrimitiveTypes () As Object = New Object(){"one", 2, 3.0} End Class // C# code public class Arrays{ [XmlArrayItem(typeof(string))] [XmlArrayItem(typeof(int))] [XmlArrayItem(typeof(double))] public object [] PrimitiveTypes = new object[]{"one", 2, 3.0}; }

オブジェクトの配列をシリアル化する例を次に示します。配列を返すフィールドは 2 つの XmlArrayItemAttribute インスタンスにより属性が設定されています。それぞれのインスタンスは XmlSerializer に対して、配列内の指定された Type を受け入れるように指示します。
Imports System Imports System.IO Imports System.Xml.Serialization Public Class Group ' The Type property instructs the XmlSerializer to accept both ' the Person and Manager types in the array. <XmlArrayItem(Type := GetType(Manager)), _ XmlArrayItem(Type := GetType(Person))> _ Public Staff() As Person End Class 'Group Public Class Person Public Name As String End Class Public Class Manager Inherits Person Public Rank As Integer End Class Public Class Run Public Shared Sub Main() Dim test As New Run() test.SerializeOrder("TypeEx.xml") End Sub Public Sub SerializeOrder(filename As String) ' Creates an XmlSerializer. Dim xSer As New XmlSerializer(GetType(Group)) ' Creates the Group object, and two array items. Dim myGroup As New Group() Dim p1 As New Person() p1.Name = "Jacki" Dim p2 As New Manager() p2.Name = "Megan" p2.Rank = 2 Dim myStaff() As Person = {p1, p2} myGroup.Staff = myStaff ' Serializes the object, and closes the StreamWriter. Dim writer As New StreamWriter(filename) xSer.Serialize(writer, myGroup) End Sub End Class 'Run
using System; using System.IO; using System.Xml.Serialization; public class Group { /* The Type property instructs the XmlSerializer to accept both the Person and Manager types in the array. */ [XmlArrayItem(Type = typeof(Manager)), XmlArrayItem(Type=typeof(Person))] public Person[]Staff; } public class Person { public string Name; } public class Manager:Person { public int Rank; } public class Run { public static void Main() { Run test = new Run(); test.SerializeOrder("TypeEx.xml"); } public void SerializeOrder(string filename) { // Creates an XmlSerializer. XmlSerializer xSer = new XmlSerializer(typeof(Group)); // Creates the Group object, and two array items. Group myGroup = new Group(); Person p1 = new Person(); p1.Name = "Jacki"; Manager p2 = new Manager(); p2.Name = "Megan"; p2.Rank = 2; Person [] myStaff = {p1,p2}; myGroup.Staff = myStaff; // Serializes the object, and closes the StreamWriter. TextWriter writer = new StreamWriter(filename); xSer.Serialize(writer, myGroup); } }
#using <System.Xml.dll> #using <System.dll> using namespace System; using namespace System::IO; using namespace System::Xml::Serialization; public ref class Person { public: String^ Name; }; public ref class Manager: public Person { public: int Rank; }; public ref class Group { public: /* The Type property instructs the XmlSerializer to accept both the Person and Manager types in the array. */ [XmlArrayItem(Type=Manager::typeid), XmlArrayItem(Type=Person::typeid)] array<Person^>^Staff; }; void SerializeOrder( String^ filename ) { // Creates an XmlSerializer. XmlSerializer^ xSer = gcnew XmlSerializer( Group::typeid ); // Creates the Group object, and two array items. Group^ myGroup = gcnew Group; Person^ p1 = gcnew Person; p1->Name = "Jacki"; Manager^ p2 = gcnew Manager; p2->Name = "Megan"; p2->Rank = 2; array<Person^>^myStaff = {p1,p2}; myGroup->Staff = myStaff; // Serializes the object, and closes the StreamWriter. TextWriter^ writer = gcnew StreamWriter( filename ); xSer->Serialize( writer, myGroup ); } int main() { SerializeOrder( "TypeEx.xml" ); }
import System.*; import System.IO.*; import System.Xml.Serialization.*; public class Group { /* The Type property instructs the XmlSerializer to accept both the Person and Manager types in the array. */ /** @attribute XmlArrayItem(Type = Manager.class) @attribute XmlArrayItem(Type = Person.class) */ public Person staff[]; } //Group public class Person { public String name; }//Person public class Manager extends Person { public int rank; } //Manager public class Run { public static void main(String[] args) { Run test = new Run(); test.SerializeOrder("TypeEx.xml"); } //main public void SerializeOrder(String fileName) { // Creates an XmlSerializer. XmlSerializer xSer = new XmlSerializer(Group.class.ToType()); // Creates the Group object, and two array items. Group myGroup = new Group(); Person p1 = new Person(); p1.name = "Jacki"; Manager p2 = new Manager(); p2.name = "Megan"; p2.rank = 2; Person myStaff[] = { p1, p2 }; myGroup.staff = myStaff; // Serializes the object, and closes the StreamWriter. TextWriter writer = new StreamWriter(fileName); xSer.Serialize(writer, myGroup); } //SerializeOrder } //Run

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