FieldInfo.IsPrivate Property

Definition

Namespace:

System.Reflection

Assembly:

System.Runtime.dll

Source:

FieldInfo.cs

Gets a value indicating whether the field is private.

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

public bool IsPrivate { get; }

member this.IsPrivate : bool

Public ReadOnly Property IsPrivate As Boolean

Property Value

Boolean

true if the field is private; otherwise; false.

Examples

The following example returns a value indicating whether or not the field of the class is private.

using namespace System;
using namespace System::Reflection;

ref class MyClass
{
private:
   String^ myField;

public:
   array<String^>^myArray;
   MyClass()
   {
      myField = "Microsoft";
      array<String^>^s = {"New York","New Jersey"};
      myArray = s;
   }

   property String^ GetField 
   {
      String^ get()
      {
         return myField;
      }
   }
};

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

      // Gets the field information of MyClass.
      array<FieldInfo^>^myFields = myType->GetFields( static_cast<BindingFlags>(BindingFlags::NonPublic | BindingFlags::Public | BindingFlags::Instance) );
      Console::WriteLine( "\nDisplaying whether the fields of {0} are private or not:\n", myType );
      for ( int i = 0; i < myFields->Length; i++ )
      {
         // Check whether the field is private or not. 
         if ( myFields[ i ]->IsPrivate )
                  Console::WriteLine( " {0} is a private field.", myFields[ i ]->Name );
         else
                  Console::WriteLine( " {0} is not a private field.", myFields[ i ]->Name );
      }
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "Exception : {0} ", e->Message );
   }
}

using System;
using System.Reflection;

class MyClass
{
    private string myField;
    public string[] myArray = new string[] {"New York", "New Jersey"};
    MyClass()
    {
        myField = "Microsoft";
    }
    string GetField
    {
        get
        {
            return myField;
        }
    }
}

class FieldInfo_IsPrivate
{
    public static void Main()
    {
        try
        {
            // Gets the type of MyClass.
            Type myType = typeof(MyClass);

            // Gets the field information of MyClass.
            FieldInfo[] myFields = myType.GetFields(BindingFlags.NonPublic
                |BindingFlags.Public
                |BindingFlags.Instance);

            Console.WriteLine("\nDisplaying whether the fields of {0} are private or not:\n", myType);
            for(int i = 0; i < myFields.Length; i++)
            {
                // Check whether the field is private or not.
                if(myFields[i].IsPrivate)
                    Console.WriteLine("{0} is a private field.", myFields[i].Name);
                else
                    Console.WriteLine("{0} is not a private field.", myFields[i].Name);
            }
        }
        catch(Exception e)
        {
            Console.WriteLine("Exception : {0} " , e.Message);
        }
    }
}

Imports System.Reflection

Class [MyClass]
    Private myField As String
    Public myArray() As String = {"New York", "New Jersey"}

    Sub New()
        myField = "Microsoft"
    End Sub

    ReadOnly Property GetField() As String
        Get
            Return myField
        End Get
    End Property
End Class


Class FieldInfo_IsPrivate

    Public Shared Sub Main()
        Try
            ' Gets the type of MyClass.
            Dim myType As Type = GetType([MyClass])

            ' Gets the field information of MyClass.
            Dim myFields As FieldInfo() = myType.GetFields((BindingFlags.NonPublic Or BindingFlags.Public Or BindingFlags.Instance))

            Console.WriteLine(ControlChars.Cr & "Displaying whether the fields of {0} are private or not:" & ControlChars.Cr, myType)
            Console.WriteLine() 
            Dim i As Integer
            For i = 0 To myFields.Length - 1
                ' Check whether the field is private or not. 
                If myFields(i).IsPrivate Then
                    Console.WriteLine("{0} is a private field.", myFields(i).Name)
                Else
                    Console.WriteLine("{0} is not a private field.", myFields(i).Name)
                End If
            Next i
        Catch e As Exception
            Console.WriteLine("Exception : {0} ", e.Message.ToString())
        End Try
    End Sub
End Class

Remarks

Private fields are accessible only from member functions.

The IsPrivate property is set when the FieldAttributes.Private attribute is set.

To get the IsPrivate property, first get the class Type. From the Type, get the FieldInfo. From the FieldInfo, get the IsPrivate property. To access a non-public field, set the BindingFlags to NonPublic, and either Static or Instance in the GetField method.

See also

• BindingFlags
• Type