FieldInfo.IsPrivate 属性

定义

命名空间:

System.Reflection

程序集:

System.Runtime.dll

Source:

FieldInfo.cs

获取一个值，通过该值指示此字段是否为私有字段。

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

public bool IsPrivate { get; }

member this.IsPrivate : bool

Public ReadOnly Property IsPrivate As Boolean

属性值

Boolean

如果此字段为私有字段，则为 true；否则为 false。

示例

以下示例返回一个值，该值指示 类的 字段是否为私有。

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

注解

私有字段只能从成员函数访问。

属性 IsPrivate 是在设置 属性时设置的 FieldAttributes.Private 。

若要获取 IsPrivate 属性，请首先获取类 Type。 Type从 中获取 FieldInfo。 从 中 FieldInfo获取 IsPrivate 属性。 若要访问非公共字段，请在 BindingFlags 方法中GetField将 NonPublic设置为 ，并将 Static 设置为 或 Instance 。

另请参阅

• BindingFlags
• Type