AttributeTargets AttributeTargets AttributeTargets AttributeTargets Enum

定義

属性を適用できるアプリケーション要素を指定します。Specifies the application elements on which it is valid to apply an attribute.

この列挙型には FlagsAttribute 属性があり、メンバー値ではビットごとの組み合わせを使用できます。

public enum class AttributeTargets
[System.Flags]
[System.Runtime.InteropServices.ComVisible(true)]
[System.Serializable]
public enum AttributeTargets
type AttributeTargets = 
Public Enum AttributeTargets
継承
AttributeTargetsAttributeTargetsAttributeTargetsAttributeTargets
属性

フィールド

All All All All 32767

任意のアプリケーション要素に属性を適用できます。Attribute can be applied to any application element.

Assembly Assembly Assembly Assembly 1

アセンブリに属性を適用できます。Attribute can be applied to an assembly.

Class Class Class Class 4

クラスに属性を適用できます。Attribute can be applied to a class.

Constructor Constructor Constructor Constructor 32

コンストラクターに属性を適用できます。Attribute can be applied to a constructor.

Delegate Delegate Delegate Delegate 4096

デリゲートに属性を適用できます。Attribute can be applied to a delegate.

Enum Enum Enum Enum 16

列挙体に属性を適用できます。Attribute can be applied to an enumeration.

Event Event Event Event 512

イベントに属性を適用できます。Attribute can be applied to an event.

Field Field Field Field 256

フィールドに属性を適用できます。Attribute can be applied to a field.

GenericParameter GenericParameter GenericParameter GenericParameter 16384

ジェネリック パラメーターに属性を適用できます。Attribute can be applied to a generic parameter. 現在、この属性は、C# コード、Microsoft Intermediate Language (MSIL) コード、および出力コードにのみ適用できます。Currently, this attribute can be applied only in C#, Microsoft intermediate language (MSIL), and emitted code.

Interface Interface Interface Interface 1024

インターフェイスに属性を適用できます。Attribute can be applied to an interface.

Method Method Method Method 64

メソッドに属性を適用できます。Attribute can be applied to a method.

Module Module Module Module 2

モジュールに属性を適用できます。Attribute can be applied to a module. Module は、Visual Basic 標準モジュールではなく、移植可能な実行可能ファイル (.dll または .exe) を参照します。Module refers to a portable executable file (.dll or.exe) and not a Visual Basic standard module.

Parameter Parameter Parameter Parameter 2048

パラメーターに属性を適用できます。Attribute can be applied to a parameter.

Property Property Property Property 128

プロパティに属性を適用できます。Attribute can be applied to a property.

ReturnValue ReturnValue ReturnValue ReturnValue 8192

戻り値に属性を適用できます。Attribute can be applied to a return value.

Struct Struct Struct Struct 8

構造体、つまり、値型に属性を適用できます。Attribute can be applied to a structure; that is, a value type.

次の例は、さまざまなターゲットへの属性の適用を示しています。The following example illustrates the application of attributes to various targets.

注意

Visual Basic および Visual C 構文現在では、パラメーターを入力する属性の適用はサポートされません。Visual Basic and Visual C++ syntax currently do not support the application of attributes to type parameters.

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(){}

   };

}

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 a generic type parameter.
    [AttributeUsage(AttributeTargets.GenericParameter)]
    public class GenericParameterTargetAttribute : 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;

        public void GenericMethod<
            [GenericParameterTarget, AllTargets] T>(T x) {
        }

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

注釈

AttributeUsageAttributeクラスはこの列挙体を使用して属性を適用するは無効になっている要素の種類を指定します。The AttributeUsageAttribute class uses this enumeration to specify the kind of element on which it is valid to apply an attribute.

AttributeTargets 列挙値は、任意の組み合わせを取得するビットごとの OR 演算と組み合わせることができます。AttributeTargets enumeration values can be combined with a bitwise OR operation to get the preferred combination.

適用対象

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