AttributeTargets 列挙体

.NET Framework クラス ライブラリ リファレンス

AttributeTargets 列挙体

属性を適用できるアプリケーション要素を指定します。

この列挙体には、メンバ値のビットごとの組み合わせを可能にする FlagsAttribute 属性が含まれています。

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

Visual Basic (宣言)

<SerializableAttribute> _
<ComVisibleAttribute(True)> _
<FlagsAttribute> _
Public Enumeration AttributeTargets

Visual Basic (使用法)

Dim instance As AttributeTargets

C#

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
[FlagsAttribute] 
public enum AttributeTargets

C++

[SerializableAttribute] 
[ComVisibleAttribute(true)] 
[FlagsAttribute] 
public enum class AttributeTargets

J#

/** @attribute SerializableAttribute() */ 
/** @attribute ComVisibleAttribute(true) */ 
/** @attribute FlagsAttribute() */ 
public enum AttributeTargets

JScript

SerializableAttribute 
ComVisibleAttribute(true) 
FlagsAttribute 
public enum AttributeTargets

メンバ

	メンバ名	説明
	Parameter	パラメータに属性を適用できます。
	Property	プロパティに属性を適用できます。
	ReturnValue	戻り値に属性を適用できます。
	Struct	構造体、つまり、値型に属性を適用できます。

解説

AttributeTargets は、属性を適用できる要素の種類を指定するために AttributeUsageAttribute のパラメータとして使用されます。

AttributeTargets 列挙値にビットごとの OR 演算を組み合わせて、属性の適切な組み合わせを取得できます。

使用例

AttributeTargets 列挙体のアプリケーションについては、次のコード例を参照してください。

Visual Basic

Imports System

Module DemoModule
    ' This attribute is only valid on a class.
    <AttributeUsage(AttributeTargets.Class)> _
    Public Class ClassTargetAttribute
        Inherits Attribute
    End Class

    ' This attribute is only valid on a method.
    <AttributeUsage(AttributeTargets.Method)> _
    Public Class MethodTargetAttribute
        Inherits Attribute
    End Class

    ' This attribute is only valid on a constructor.
    <AttributeUsage(AttributeTargets.Constructor)> _
    Public Class ConstructorTargetAttribute
 
        Inherits Attribute
    End Class

    ' This attribute is only valid on a field.
    <AttributeUsage(AttributeTargets.Field)> _
    Public Class FieldTargetAttribute 
        Inherits Attribute
    End Class

    ' This attribute is valid on a class or a method.
    <AttributeUsage(AttributeTargets.Class Or AttributeTargets.Method)>
 _
    Public Class ClassMethodTargetAttribute
 
        Inherits Attribute
    End Class

    ' This attribute is valid on any target.
    <AttributeUsage(AttributeTargets.All)> _
    Public Class AllTargetsAttribute 
        Inherits Attribute
    End Class

    <ClassTarget, _
    ClassMethodTarget, _
    AllTargets> _
    Public Class TestClassAttribute
        <ConstructorTarget, _
        AllTargets> _
        Public Sub New
        End Sub

        <MethodTarget, _
        ClassMethodTarget, _
        AllTargets> _
        Public Sub Method1()
        End Sub

        <FieldTarget, _
        AllTargets> _
        Public myInt as Integer
    End Class

    Sub Main()
    End Sub
End Module

C#

using System;

namespace AttTargsCS {
    // This attribute is only valid on a class.
    [AttributeUsage(AttributeTargets.Class)]
    public class ClassTargetAttribute : Attribute
 {
    }

    // This attribute is only valid on a method.
    [AttributeUsage(AttributeTargets.Method)]
    public class MethodTargetAttribute : Attribute
 {
    }

    // This attribute is only valid on a constructor.
    [AttributeUsage(AttributeTargets.Constructor)]
    public class ConstructorTargetAttribute
 : Attribute {
    }

    // This attribute is only valid on a field.
    [AttributeUsage(AttributeTargets.Field)]
    public class FieldTargetAttribute : Attribute
 {
    }

    // This attribute is valid on a class or a method.
    [AttributeUsage(AttributeTargets.Class|AttributeTargets.Method)]
    public class ClassMethodTargetAttribute
 : Attribute {
    }

    // This attribute is valid on any target.
    [AttributeUsage(AttributeTargets.All)]
    public class AllTargetsAttribute : Attribute
 {
    }

    [ClassTarget]
    [ClassMethodTarget]
    [AllTargets]
    public class TestClassAttribute {
        [ConstructorTarget]
        [AllTargets]
        TestClassAttribute() {
        }

        [MethodTarget]
        [ClassMethodTarget]
        [AllTargets]
        public void Method1() {
        }

        [FieldTarget]
        [AllTargets]
        public int myInt;

        static void Main(string[]
 args) {
        }
    }
}

C++

using namespace System;

namespace AttTargsCS
{

   // This attribute is only valid on a class.

   [AttributeUsage(AttributeTargets::Class)]
   public ref class ClassTargetAttribute: public
 Attribute{};


   // This attribute is only valid on a method.

   [AttributeUsage(AttributeTargets::Method)]
   public ref class MethodTargetAttribute:
 public Attribute{};


   // This attribute is only valid on a constructor.

   [AttributeUsage(AttributeTargets::Constructor)]
   public ref class ConstructorTargetAttribute:
 public Attribute{};


   // This attribute is only valid on a field.

   [AttributeUsage(AttributeTargets::Field)]
   public ref class FieldTargetAttribute: public
 Attribute{};


   // This attribute is valid on a class or a method.

   [AttributeUsage(AttributeTargets::Class|AttributeTargets::Method)]
   public ref class ClassMethodTargetAttribute:
 public Attribute{};


   // This attribute is valid on any target.

   [AttributeUsage(AttributeTargets::All)]
   public ref class AllTargetsAttribute: public
 Attribute{};


   [ClassTarget]
   [ClassMethodTarget]
   [AllTargets]
   public ref class TestClassAttribute
   {
   private:

      [ConstructorTarget]
      [AllTargets]
      TestClassAttribute(){}


   public:

      [MethodTarget]
      [ClassMethodTarget]
      [AllTargets]
      void Method1(){}


      [FieldTarget]
      [AllTargets]
      int myInt;
      static void Main(){}

   };

}

J#

package AttTargsJSL;
import System.*;

// This attribute is only valid on a class.
/** @attribute AttributeUsage(AttributeTargets.Class)
 */
public class ClassTargetAttribute extends Attribute
{
} //ClassTargetAttribute

// This attribute is only valid on a method.
/** @attribute AttributeUsage(AttributeTargets.Method)
 */
public class MethodTargetAttribute extends
 Attribute
{
} //MethodTargetAttribute

// This attribute is only valid on a constructor.
/** @attribute AttributeUsage(AttributeTargets.Constructor)
 */
public class ConstructorTargetAttribute extends
 Attribute
{
} //ConstructorTargetAttribute

// This attribute is only valid on a field.
/** @attribute AttributeUsage(AttributeTargets.Field)
 */
public class FieldTargetAttribute extends Attribute
{
} //FieldTargetAttribute

// This attribute is valid on a class or a method.
/** @attribute AttributeUsage(AttributeTargets.Class | AttributeTargets.Method)
 */
public class ClassMethodTargetAttribute extends
 Attribute
{
} //ClassMethodTargetAttribute

// This attribute is valid on any target.
/** @attribute AttributeUsage(AttributeTargets.All)
 */
public class AllTargetsAttribute extends Attribute
{
} //AllTargetsAttribute

/** @attribute ClassTarget()
 */
/** @attribute ClassMethodTarget()
 */
/** @attribute AllTargets()
 */
public class TestClassAttribute
{
    /** @attribute.ConstructorTarget ConstructorTarget()
     */
    /** @attribute AllTargets()
     */
    TestClassAttribute()
    {
    } //TestClassAttribute

    /** @attribute MethodTarget()
     */
    /** @attribute ClassMethodTarget()
     */
    /** @attribute AllTargets()
     */
    public void Method1()
    {
    } //Method1

    /** @attribute FieldTarget()
     */
    /** @attribute AllTargets()
     */
    public int myInt;

    public static void main(String[]
 args)
    {
    } //main
} //TestClassAttribute

JScript

import System;

package AttTargsJS {
    // This attribute is only valid on a class.
    AttributeUsage(AttributeTargets.Class)
    public class ClassTargetAttribute extends
 Attribute {
    }

    // This attribute is only valid on a method.
    AttributeUsage(AttributeTargets.Method)
    public class MethodTargetAttribute extends
 Attribute {
    }

    // This attribute is only valid on a constructor.
    AttributeUsage(AttributeTargets.Constructor)
    public class ConstructorTargetAttribute
 extends Attribute {
    }

    // This attribute is only valid on a field.
    AttributeUsage(AttributeTargets.Field)
    public class FieldTargetAttribute extends
 Attribute {
    }

    // This attribute is valid on a class or a method.
    AttributeUsage(AttributeTargets.Class|AttributeTargets.Method)
    public class ClassMethodTargetAttribute
 extends Attribute {
    }

    // This attribute is valid on any target.
    AttributeUsage(AttributeTargets.All)
    public class AllTargetsAttribute extends
 Attribute {
    }

    ClassTargetAttribute
        ClassMethodTargetAttribute
        AllTargetsAttribute
    public class TestClassAttribute {
        ConstructorTargetAttribute
        AllTargetsAttribute
        function TestClassAttribute() {
        }

        MethodTargetAttribute
                ClassMethodTargetAttribute
                AllTargetsAttribute
        public function Method1() {
        }

        FieldTargetAttribute
                AllTargetsAttribute
        public var myInt : int;

        static function Main(args : String[])
 {
        }
    }
}

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
System 名前空間
AttributeUsageAttribute