Type.IsVisible 属性

定义

获取一个指示 Type 是否可由程序集之外的代码访问的值。Gets a value indicating whether the Type can be accessed by code outside the assembly.

public:
 property bool IsVisible { bool get(); };
public bool IsVisible { get; }
member this.IsVisible : bool
Public ReadOnly Property IsVisible As Boolean

属性值

如果当前 true 是公共类型或公共嵌套类型从而使所有封闭类型都是公共类型,则为 Type;否则为 falsetrue if the current Type is a public type or a public nested type such that all the enclosing types are public; otherwise, false.

示例

下面的代码示例测试两个类,其中只有一个类在程序集外可见。The following code example tests two classes, only one of which is visible outside the assembly.

using namespace System;

private ref class InternalOnly 
{
public:
    ref class Nested {};
};

public ref class Example 
{
public:
    ref class Nested {};
}; 


// Entry point of example
int main()
{
    Type^ classType = InternalOnly::Nested::typeid;
    Console::WriteLine(
        "Is the {0} class visible outside the assembly? {1}",
        classType->FullName, classType->IsVisible);

    classType = Example::Nested::typeid;
    Console::WriteLine(
        "Is the {0} class visible outside the assembly? {1}", 
        classType->FullName, classType->IsVisible);
}

/* This example produces the following output:

Is the InternalOnly+Nested class visible outside the assembly? False
Is the Example+Nested class visible outside the assembly? True
*/
using System;

internal class InternalOnly 
{
    public class Nested {}
}

public class Example
{
    public class Nested {}

    public static void Main()
    {
        Type t = typeof(InternalOnly.Nested);
        Console.WriteLine(
            "Is the {0} class visible outside the assembly? {1}", 
            t.FullName, 
            t.IsVisible
        );

        t = typeof(Example.Nested);
        Console.WriteLine(
            "Is the {0} class visible outside the assembly? {1}", 
            t.FullName, 
            t.IsVisible
        );
    }
}

/* This example produces the following output:

Is the InternalOnly+Nested class visible outside the assembly? False
Is the Example+Nested class visible outside the assembly? True
 */
Friend Class InternalOnly
    Public Class Nested
    End Class
End Class

Public Class Example
    Public Class Nested
    End Class

    Public Shared Sub Main()
        With GetType(InternalOnly.Nested)
            Console.WriteLine("Is the " & .FullName _ 
                & " class visible outside the assembly? " & .IsVisible)
        End With

        With GetType(Example.Nested)
            Console.WriteLine("Is the " & .FullName _ 
                & " class visible outside the assembly? " & .IsVisible)
        End With
    End Sub
End Class

' This example produces the following output:
'
'Is the InternalOnly+Nested class visible outside the assembly? False
'Is the Example+Nested class visible outside the assembly? True

注解

使用此属性确定类型是否为组件程序集的公共接口的一部分。Use this property to determine whether a type is part of the public interface of a component assembly.

适用于