FieldInfo.IsPublic Eigenschaft

Definition

Namespace:

System.Reflection

Assembly:

System.Runtime.dll

Quelle:

FieldInfo.cs

Ruft einen Wert ab, der angibt, ob das Feld öffentlich ist.

public:
 property bool IsPublic { bool get(); };

public bool IsPublic { get; }

member this.IsPublic : bool

Public ReadOnly Property IsPublic As Boolean

Eigenschaftswert

Boolean

true, wenn das Feld öffentlich ist, andernfalls false.

Beispiele

Im folgenden Beispiel wird ein Wert zurückgegeben, der angibt, ob das Feld der Klasse öffentlich oder privat ist.

using namespace System;
using namespace System::Reflection;

// Make two fields.
// private
public ref class Myfielda
{
private:
   String^ SomeField;

public:
   Myfielda()
      : SomeField( "private field" )
   {}


   property String^ Field 
   {
      String^ get()
      {
         return SomeField;
      }

   }

};


// public
public ref class Myfieldb
{
public:
   String^ SomeField;
   Myfieldb()
      : SomeField( "public field" )
   {}


   property String^ Field 
   {
      String^ get()
      {
         return SomeField;
      }

   }

};

int main()
{
   Console::WriteLine( "\nReflection.FieldInfo" );
   Myfielda^ myfielda = gcnew Myfielda;
   Myfieldb^ myfieldb = gcnew Myfieldb;
   
   // Get the Type and FieldInfo.
   Type^ MyTypea = Type::GetType( "Myfielda" );
   FieldInfo^ Myfieldinfoa = MyTypea->GetField( "SomeField", static_cast<BindingFlags>(BindingFlags::NonPublic | BindingFlags::Instance) );
   Type^ MyTypeb = Type::GetType( "Myfieldb" );
   FieldInfo^ Myfieldinfob = MyTypeb->GetField( "SomeField" );
   
   // Get and display the IsPublic and IsPrivate property values.
   Console::Write( "\n{0}.", MyTypea->FullName );
   Console::Write( "{0} - ", Myfieldinfoa->Name );
   Console::Write( "{0}", myfielda->Field );
   Console::Write( "\n   IsPublic = {0}", Myfieldinfoa->IsPublic );
   Console::Write( "\n   IsPrivate = {0}", Myfieldinfoa->IsPrivate );
   Console::Write( "\n{0}.", MyTypeb->FullName );
   Console::Write( "{0} - ", Myfieldinfob->Name );
   Console::Write( "{0};", myfieldb->Field );
   Console::Write( "\n   IsPublic = {0}", Myfieldinfob->IsPublic );
   Console::Write( "\n   IsPrivate = {0}", Myfieldinfob->IsPrivate );
   return 0;
}

using System;
using System.Reflection;

 // Make two fields.
public
    class Myfielda // private
{
    private string SomeField = "private field";
    public string Field
    {
        get{return SomeField;}
    }
}

public
    class Myfieldb // public
{
    public string SomeField = "public field";
}

public
    class Myfieldinfo
{
    public static int Main()
    {
        Console.WriteLine("\nReflection.FieldInfo");
        Myfielda Myfielda = new Myfielda();
        Myfieldb Myfieldb = new Myfieldb();

        // Get the Type and FieldInfo.
        Type MyTypea = typeof(Myfielda);
        FieldInfo Myfieldinfoa = MyTypea.GetField("SomeField",
            BindingFlags.NonPublic|BindingFlags.Instance);
        Type MyTypeb = typeof(Myfieldb);
        FieldInfo Myfieldinfob = MyTypeb.GetField("SomeField");

        // Get and display the IsPublic and IsPrivate property values.
        Console.Write("\n{0}.", MyTypea.FullName);
        Console.Write("{0} - ", Myfieldinfoa.Name);
        Console.Write("{0}", Myfielda.Field);
        Console.Write("\n   IsPublic = {0}", Myfieldinfoa.IsPublic);
        Console.Write("\n   IsPrivate = {0}", Myfieldinfoa.IsPrivate);

        Console.Write("\n{0}.", MyTypeb.FullName);
        Console.Write("{0} - ", Myfieldinfob.Name);
        Console.Write("{0};", Myfieldb.SomeField);
        Console.Write("\n   IsPublic = {0}", Myfieldinfob.IsPublic);
        Console.Write("\n   IsPrivate = {0}", Myfieldinfob.IsPrivate);

        return 0;
    }
}

Imports System.Reflection

' Make two fields.
Public Class Myfielda
    ' Make a private field.
    Private SomeField As String = "private field"

    Public ReadOnly Property Field() As String
        Get
            Return SomeField
        End Get
    End Property
End Class

Public Class Myfieldb
    ' Make a public field.
    Public SomeField As String = "public field"
End Class

Public Class Myfieldinfo

    Public Shared Function Main() As Integer
        Console.WriteLine("Reflection.FieldInfo")
        Console.WriteLine()
        Dim Myfielda As New Myfielda()
        Dim Myfieldb As New Myfieldb()

        ' Get the Type and FieldInfo.
        Dim MyTypea As Type = GetType(Myfielda)
        Dim Myfieldinfoa As FieldInfo = MyTypea.GetField("SomeField", _
            BindingFlags.NonPublic Or BindingFlags.Instance)
        Dim MyTypeb As Type = GetType(Myfieldb)
        Dim Myfieldinfob As FieldInfo = MyTypeb.GetField("SomeField")

        ' Get and display the IsPublic and IsPrivate property values.
        Console.WriteLine("{0}.{1} - {2}", MyTypea.FullName, Myfieldinfoa.Name, _
            Myfielda.Field)
        Console.WriteLine("   IsPublic = {0}", Myfieldinfoa.IsPublic)
        Console.WriteLine("   IsPrivate = {0}", Myfieldinfoa.IsPrivate)
        Console.WriteLine()
        Console.WriteLine("{0}.{1} - {2}", MyTypeb.FullName, Myfieldinfob.Name, _
            Myfieldb.SomeField)
        Console.WriteLine("   IsPublic = {0}", Myfieldinfob.IsPublic)
        Console.WriteLine("   IsPrivate = {0}", Myfieldinfob.IsPrivate)

        Return 0
    End Function 'Main
End Class

Hinweise

Auf öffentliche Felder kann überall zugegriffen werden, wo die entsprechenden Klassen sichtbar sind.

Die IsPublic -Eigenschaft wird festgelegt, wenn das FieldAttributes.Public Attribut festgelegt wird.

Um die IsPublic -Eigenschaft abzurufen, rufen Sie zuerst die -Klasse Typeab. Rufen Sie aus die Typeab FieldInfo. Rufen Sie aus die FieldInfo-Eigenschaft ab IsPublic . Wenn das Feld nicht öffentlich ist, ist es geschützt und kann nicht ohne weiteres zugegriffen werden. Um auf ein nicht öffentliches Feld zuzugreifen, legen Sie auf fest BindingFlagsNonPublic, geben Sie entweder BindingFlags.Instance oder BindingFlags.Statican, und verwenden Sie dies für die GetField -Methode.

Weitere Informationen

• FieldAttributes
• BindingFlags