MemberInfo.IsDefined(Type, Boolean) MemberInfo.IsDefined(Type, Boolean) MemberInfo.IsDefined(Type, Boolean) MemberInfo.IsDefined(Type, Boolean) Method

정의

파생 클래스에서 재정의되는 경우 지정된 형식 또는 파생 형식의 특성이 하나 이상 이 멤버에 적용되는지 여부를 나타냅니다.When overridden in a derived class, indicates whether one or more attributes of the specified type or of its derived types is applied to this member.

public:
 abstract bool IsDefined(Type ^ attributeType, bool inherit);
public abstract bool IsDefined (Type attributeType, bool inherit);
abstract member IsDefined : Type * bool -> bool
Public MustOverride Function IsDefined (attributeType As Type, inherit As Boolean) As Boolean

매개 변수

attributeType
Type Type Type Type

검색할 사용자 지정 특성의 형식입니다.The type of custom attribute to search for. 검색 대상에는 파생 형식이 포함됩니다.The search includes derived types.

inherit
Boolean Boolean Boolean Boolean

이 멤버의 상속 체인을 검색하여 특성을 찾으려면 true이고 그렇지 않으면 false입니다.true to search this member's inheritance chain to find the attributes; otherwise, false. 이 매개 변수는 속성 및 이벤트에 대해 무시됩니다.This parameter is ignored for properties and events.

반환

이 멤버에 attributeType 또는 파생 형식의 인스턴스가 하나 이상 적용되면 true이고, 그렇지 않으면 false입니다.true if one or more instances of attributeType or any of its derived types is applied to this member; otherwise, false.

구현

예제

다음 예제에서는 지정 된 특성이 지정된 된 멤버에 적용 되는지 여부를 결정 합니다.The following example determines whether the specified attribute is applied to the specified member.

using namespace System;
using namespace System::Reflection;

// Define a custom attribute with one named parameter.

[AttributeUsage(AttributeTargets::All)]
public ref class MyAttribute: public Attribute
{
private:
   String^ myName;

public:
   MyAttribute( String^ name )
   {
      myName = name;
   }

   property String^ Name 
   {
      String^ get()
      {
         return myName;
      }
   }
};

// Define a class that has the custom attribute associated with one of its members.
public ref class MyClass1
{
public:

   [MyAttribute("This is an example attribute.")]
   void MyMethod( int i ){}
};

int main()
{
   try
   {
      // Get the type of MyClass1.
      Type^ myType = MyClass1::typeid;

      // Get the members associated with MyClass1.
      array<MemberInfo^>^myMembers = myType->GetMembers();

      // Display the attributes for each of the members of MyClass1.
      for ( int i = 0; i < myMembers->Length; i++ )
      {
         // Display the attribute if it is of type MyAttribute.
         if ( myMembers[ i ]->IsDefined( MyAttribute::typeid, false ) )
         {
            array<Object^>^myAttributes = myMembers[ i ]->GetCustomAttributes( MyAttribute::typeid, false );
            Console::WriteLine( "\nThe attributes of type MyAttribute for the member {0} are: \n", myMembers[ i ] );
            for ( int j = 0; j < myAttributes->Length; j++ )

               // Display the value associated with the attribute.
               Console::WriteLine( "The value of the attribute is : \"{0}\"",
                        (safe_cast<MyAttribute^>(myAttributes[ j ]))->Name );
         }
      }
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "An exception occurred: {0}", e->Message );
   }
}

using System;
using System.Reflection;

// Define a custom attribute with one named parameter.
[AttributeUsage(AttributeTargets.All)]
public class MyAttribute : Attribute
{
    private string myName;
    public MyAttribute(string name)
    {
        myName = name;
    }
    public string Name
    {
        get
        {
            return myName;
        }
    }
}

// Define a class that has the custom attribute associated with one of its members.
public class MyClass1
{
    [MyAttribute("This is an example attribute.")]
    public void MyMethod(int i)
    {
        return;
    }
}

public class MemberInfo_GetCustomAttributes_IsDefined
{
    public static void Main()
    {
        try
        {
            // Get the type of MyClass1.
            Type myType = typeof(MyClass1);
            // Get the members associated with MyClass1.
            MemberInfo[] myMembers = myType.GetMembers();

            // Display the attributes for each of the members of MyClass1.
            for(int i = 0; i < myMembers.Length; i++)
            {
                // Display the attribute if it is of type MyAttribute.
                if(myMembers[i].IsDefined(typeof(MyAttribute), false))
                {
                    Object[] myAttributes = myMembers[i].GetCustomAttributes(typeof(MyAttribute), false);
                    Console.WriteLine("\nThe attributes of type MyAttribute for the member {0} are: \n",
                        myMembers[i]);
                    for(int j = 0; j < myAttributes.Length; j++)
                        // Display the value associated with the attribute.
                        Console.WriteLine("The value of the attribute is : \"{0}\"",
                            ((MyAttribute)myAttributes[j]).Name);
                }
            }
        }
        catch(Exception e)
        {
            Console.WriteLine("An exception occurred: {0}", e.Message);
        }
    }
}
Imports System
Imports System.Reflection
Imports Microsoft.VisualBasic

' Define a custom attribute with one named parameter.
<AttributeUsage(AttributeTargets.All)> Public Class MyAttribute
    Inherits Attribute
    Private myName As String

    Public Sub New(ByVal name As String)
        myName = name
    End Sub 'New

    Public ReadOnly Property Name() As String
        Get
            Return myName
        End Get
    End Property
End Class 'MyAttribute

' Define a class that has the custom attribute associated with one of its members.
Public Class MyClass1

    <MyAttribute("This is an example attribute.")> Public Sub MyMethod(ByVal i As Integer)
        Return
    End Sub 'MyMethod
End Class 'MyClass1

Public Class MemberInfo_GetCustomAttributes_IsDefined

    Public Shared Sub Main()
        Try
            ' Get the type of MyClass1.
            Dim myType As Type = GetType(MyClass1)
            ' Get the members associated with MyClass1.
            Dim myMembers As MemberInfo() = myType.GetMembers()

            ' Display the attributes for each of the members of MyClass1.
            Dim i As Integer
            For i = 0 To myMembers.Length - 1
                ' Display the attribute if it is of type MyAttribute.
                If myMembers(i).IsDefined(GetType(MyAttribute), False) Then
                    Dim myAttributes As [Object]() = myMembers(i).GetCustomAttributes(GetType(MyAttribute), False)
                    Console.WriteLine(ControlChars.Cr + "The attributes of type MyAttribute for the member {0} are: " + ControlChars.Cr, myMembers(i))
                    Dim j As Integer
                    For j = 0 To myAttributes.Length - 1
                        ' Display the value associated with the attribute.
                        Console.WriteLine("The value of the attribute is : ""{0}""", CType(myAttributes(j), MyAttribute).Name)
                    Next j
                End If
            Next i
        Catch e As Exception
            Console.WriteLine("An exception occurred: {0}", e.Message)
        End Try
    End Sub 'Main
End Class 'MemberInfo_GetCustomAttributes_IsDefined

설명

이 메서드는 무시 합니다 inherit 속성 및 이벤트에 대 한 매개 변수입니다.This method ignores the inherit parameter for properties and events. 속성 및 이벤트의 특성에 대 한 상속 체인을 검색 하려면 적절 한 오버 로드를 사용 합니다 Attribute.IsDefined 메서드.To search the inheritance chain for attributes on properties and events, use the appropriate overloads of the Attribute.IsDefined method.

참고

.NET framework 버전 2.0에서이 메서드는 다음과 같이 반환 됩니다. true 형식, 메서드 또는 생성자에 새 메타 데이터 형식으로 저장 하는 보안 특성이 있는 경우.In the .NET Framework version 2.0, this method returns true if a type, method, or constructor has security attributes stored in the new metadata format. 버전 2.0으로 컴파일된 어셈블리에는이 형식을 사용 합니다.Assemblies compiled with version 2.0 use this format. 동적 어셈블리 및 이전 버전의.NET Framework를 사용 하 여 컴파일된 어셈블리에는 이전 XML 형식을 사용 합니다.Dynamic assemblies and assemblies compiled with earlier versions of the .NET Framework use the old XML format. 참조 선언적 보안 특성 내보내기합니다.See Emitting Declarative Security Attributes.

적용 대상