FieldInfo.IsFamilyAndAssembly 属性

定义

命名空间:

System.Reflection

程序集:

netstandard.dll, System.Runtime.dll

Source:

FieldInfo.cs

获取一个值，该值指示此字段的可见性是否由 FamANDAssem;也就是说，可以从派生类访问该字段，但前提是这些字段位于同一程序集中。

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

public bool IsFamilyAndAssembly { get; }

member this.IsFamilyAndAssembly : bool

Public ReadOnly Property IsFamilyAndAssembly As Boolean

属性值

Boolean

true 如果对此字段的访问完全由 FamANDAssem该字段进行描述，则为 ;否则为 false。

示例

下面的代码示例定义具有不同可见性级别的字段，并显示它们的 IsAssembly值、 IsFamily属性 IsFamilyOrAssembly和 IsFamilyAndAssembly 属性。

using System;
using System.Reflection;

public class Example
{
    public int f_public;
    internal int f_internal;
    protected int f_protected;
    protected internal int f_protected_public;
    private protected int f_private_protected;

    public static void Main()
    {
        Console.WriteLine("\n{0,-30}{1,-18}{2}", "", "IsAssembly", "IsFamilyOrAssembly");
        Console.WriteLine("{0,-21}{1,-18}{2,-18}{3}\n",
            "", "IsPublic", "IsFamily", "IsFamilyAndAssembly");

        foreach (FieldInfo f in typeof(Example).GetFields(
            BindingFlags.Instance | BindingFlags.NonPublic | BindingFlags.Public))
        {
            Console.WriteLine("{0,-21}{1,-9}{2,-9}{3,-9}{4,-9}{5,-9}",
                f.Name,
                f.IsPublic,
                f.IsAssembly,
                f.IsFamily,
                f.IsFamilyOrAssembly,
                f.IsFamilyAndAssembly
            );
        }
    }
}

/* This code example produces output similar to the following:

                              IsAssembly        IsFamilyOrAssembly
                     IsPublic          IsFamily          IsFamilyAndAssembly

f_public             True     False    False    False    False
f_internal           False    True     False    False    False
f_protected          False    False    True     False    False
f_protected_public   False    False    False    True     False
f_private_protected  False    False    False    False    True
 */

Imports System.Reflection

Public class Example

    Public f_Public As Integer
    Friend f_Friend As Integer 
    Protected f_Protected As Integer
    Protected Friend f_Protected_Friend As Integer
    Private Protected f_Private_Protected() As Integer

    Public Shared Sub Main()
    
        Console.WriteLine(vbCrLf & _
            "{0,-30}{1,-18}{2}", "", "IsAssembly", "IsFamilyOrAssembly") 
        Console.WriteLine("{0,-21}{1,-18}{2,-18}{3}" & vbCrLf, _
            "", "IsPublic", "IsFamily", "IsFamilyAndAssembly")
   
        For Each f As FieldInfo In GetType(Example).GetFields( _
            BindingFlags.Instance Or BindingFlags.NonPublic Or BindingFlags.Public)
        
            Console.WriteLine("{0,-21}{1,-9}{2,-9}{3,-9}{4,-9}{5,-9}", _
                f.Name, _
                f.IsPublic, _
                f.IsAssembly, _
                f.IsFamily, _
                f.IsFamilyOrAssembly, _
                f.IsFamilyAndAssembly _
            )
        Next
    End Sub
End Class

' This code example produces output similar to the following:
'
'                              IsAssembly        IsFamilyOrAssembly
'                     IsPublic          IsFamily          IsFamilyAndAssembly
'
'f_Public             True     False    False    False    False
'f_Friend             False    True     False    False    False
'f_Protected          False    False    True     False    False
'f_Protected_Friend   False    False    False    True     False
'f_Private_Protected  False    False    False    False    True

注解

如果字段具有 FamANDAssem 级别可见性，则可以从同一程序集中派生类中的任何成员调用该字段，但不能从任何其他类型调用它。

如果 c# 中的可见性修饰符在 C# 中为 FieldAttributes.FamANDAssem 或 private protected Visual Basic，则Private Protected完全描述了字段的可见性。

另请参阅

• IsFamilyOrAssembly
• FieldAttributes
• IsAssembly
• IsFamily