Object.GetType メソッド

.NET Framework クラス ライブラリ リファレンス

Object.GetType メソッド

現在のインスタンスの Type を取得します。

名前空間: System
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Function GetType
 As Type

Visual Basic (使用法)

Dim instance As Object
Dim returnValue As Type

returnValue = instance.GetType

C#

public Type GetType ()

C++

public:
Type^ GetType ()

J#

public Type GetType ()

JScript

public function GetType () : Type

戻り値
現在のインスタンスの正確なランタイム型を表す Type インスタンス。

解説

2 つのオブジェクト x と y のランタイム型が同一の場合には、Object.ReferenceEquals(x.GetType(),y.GetType()) は true を返します。

Type オブジェクトは、現在の Object に関連付けられているメタデータを公開します。

使用例

現在のインスタンスのランタイム型を返す GetType のコード例を次に示します。

C#

using System;

public class MyBaseClass: Object {
}

public class MyDerivedClass: MyBaseClass {
}

public class Test {

   public static void Main()
 {
      MyBaseClass myBase = new MyBaseClass();
      MyDerivedClass myDerived = new MyDerivedClass();
      object o = myDerived;
      MyBaseClass b = myDerived;

      Console.WriteLine("mybase: Type is {0}", myBase.GetType());
      Console.WriteLine("myDerived: Type is {0}", myDerived.GetType());
      Console.WriteLine("object o = myDerived: Type is {0}", o.GetType());
      Console.WriteLine("MyBaseClass b = myDerived: Type is {0}", b.GetType());
   }
}


/*

This code produces the following output.

mybase: Type is MyBaseClass
myDerived: Type is MyDerivedClass
object o = myDerived: Type is MyDerivedClass
MyBaseClass b = myDerived: Type is MyDerivedClass 

*/

C++

using namespace System;
public ref class MyBaseClass: public
 Object{};

public ref class MyDerivedClass: public
 MyBaseClass{};

int main()
{
   MyBaseClass^ myBase = gcnew MyBaseClass;
   MyDerivedClass^ myDerived = gcnew MyDerivedClass;
   Object^ o = myDerived;
   MyBaseClass^ b = myDerived;
   Console::WriteLine( "mybase: Type is {0}", myBase->GetType() );
   Console::WriteLine( "myDerived: Type is {0}", myDerived->GetType()
 );
   Console::WriteLine( "object o = myDerived: Type is {0}", o->GetType()
 );
   Console::WriteLine( "MyBaseClass b = myDerived: Type is {0}", b->GetType()
 );
}

/*

This code produces the following output.

mybase: Type is MyBaseClass
myDerived: Type is MyDerivedClass
object o = myDerived: Type is MyDerivedClass
MyBaseClass b = myDerived: Type is MyDerivedClass 

*/

J#

import System.*;

public class MyBaseClass extends Object
{
} //MyBaseClass

public class MyDerivedClass extends MyBaseClass
{
} //MyDerivedClass

public class Test
{
    public static void main(String[]
 args)
    {
        MyBaseClass myBase = new MyBaseClass();
        MyDerivedClass myDerived = new MyDerivedClass();
        Object o = myDerived;
        MyBaseClass b = myDerived;

        Console.WriteLine("mybase: Type is {0}", myBase.GetType());
        Console.WriteLine("myDerived: Type is {0}", myDerived.GetType());
        Console.WriteLine("object o = myDerived: Type is {0}", o.GetType());
        Console.WriteLine("MyBaseClass b = myDerived: Type is {0}", b.GetType());
    } //main
} //Test

/*

This code produces the following output.

mybase: Type is MyBaseClass
myDerived: Type is MyDerivedClass
object o = myDerived: Type is MyDerivedClass
MyBaseClass b = myDerived: Type is MyDerivedClass 

*/

JScript

import System

public class MyBaseClass extends
 Object {
}

public class MyDerivedClass extends
 MyBaseClass {
}

public class Test {

   public static function
 Main() {
      var myBase : MyBaseClass = new MyBaseClass();
      var myDerived : MyDerivedClass = new
 MyDerivedClass();
      var o = myDerived;
      var b : MyBaseClass = myDerived;

      Console.WriteLine("mybase: Type is {0}", myBase.GetType());
      Console.WriteLine("myDerived: Type is {0}", myDerived.GetType());
      Console.WriteLine("object o = myDerived: Type is {0}", o.GetType());
      Console.WriteLine("MyBaseClass b = myDerived: Type is {0}", b.GetType());
   }
}

Test.Main();

/*

This code produces the following output.

mybase: Type is MyBaseClass
myDerived: Type is MyDerivedClass
object o = myDerived: Type is MyDerivedClass
MyBaseClass b = myDerived: Type is MyDerivedClass 

*/

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
Object クラス
Object メンバ
System 名前空間
Type