FieldInfo.IsAssembly 属性
定义
重要
一些信息与预发行产品相关，相应产品在发行之前可能会进行重大修改。 对于此处提供的信息，Microsoft 不作任何明示或暗示的担保。
获取一个值，该值指示此字段的潜在可见性是否由 Assembly 描述；也就是说，此字段只对同一程序集中的其他类型可见，而对该程序集以外的派生类型则不可见。
public:
property bool IsAssembly { bool get(); };public bool IsAssembly { get; }member this.IsAssembly : boolPublic ReadOnly Property IsAssembly As Boolean属性值
如果此字段的可见性由 Assembly 准确描述，则为 true；否则为 false。
实现
示例
下面的代码示例定义具有不同可见性级别的字段，并显示其 IsAssembly、 IsFamily、 IsFamilyOrAssembly和 IsFamilyAndAssembly 属性的值。
using namespace System;
using namespace System::Reflection;
public ref class Example
{
public:
int f_public;
internal:
int f_internal;
protected:
int f_protected;
protected public:
int f_protected_public;
protected private:
int f_protected_private;
};
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");
for each (FieldInfo^ f in Example::typeid->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_protected_private False False False False True
*/
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
字段的实际可见性受其类型的可见性限制。 属性 IsAssembly 可能 true 用于字段，但如果它是私有嵌套类型的字段，则该字段在包含类型之外不可见。
如果在 Visual Basic) 中 (Friend 唯一internal的可见性修饰符，则会准确描述FieldAttributes.Assembly字段的可见性。 此属性false适用于 C# (Protected Friend Visual Basic 中 Cprotected public++) 中的字段protected internal;使用 IsFamilyOrAssembly 属性标识此类字段。
