發行項
11/18/2011

Type.IsVisible Property

Microsoft Silverlight will reach end of support after October 2021. Learn more.

Gets a value indicating whether the Type can be accessed by code outside the assembly.

Namespace: System
Assembly: mscorlib (in mscorlib.dll)

Syntax

'Declaration
Public ReadOnly Property IsVisible As Boolean

public bool IsVisible { get; }

Property Value

Type: System.Boolean
true if the current Type is a public type or a public nested type such that all the enclosing types are public; otherwise, false.

Remarks

Use this property to determine whether a type is part of the public interface of a component assembly.

Examples

The following code example tests two classes, only one of which is visible outside the assembly.

Note:
To run this example, see Building Examples That Use a Demo Method and a TextBlock Control.


Friend Class InternalOnly
   Public Class Nested
   End Class
End Class

Public Class Example
   Public Class Nested
   End Class

   Public Shared Sub Demo(ByVal outputBlock As System.Windows.Controls.TextBlock)
      With GetType(InternalOnly.Nested)
         outputBlock.Text &= "Is the " & .FullName _
             & " class visible outside the assembly? " & .IsVisible & vbCrLf
      End With

      With GetType(Example.Nested)
         outputBlock.Text &= "Is the " & .FullName _
             & " class visible outside the assembly? " & .IsVisible & vbCrLf
      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

using System;

internal class InternalOnly
{
   public class Nested { }
}

public class Example
{
   public class Nested { }

   public static void Demo(System.Windows.Controls.TextBlock outputBlock)
   {
      Type t = typeof(InternalOnly.Nested);
      outputBlock.Text += String.Format(
          "Is the {0} class visible outside the assembly? {1}",
          t.FullName,
          t.IsVisible
      ) + "\n";

      t = typeof(Example.Nested);
      outputBlock.Text += String.Format(
          "Is the {0} class visible outside the assembly? {1}",
          t.FullName,
          t.IsVisible
      ) + "\n";
   }
}

/* 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
 */

Version Information

Silverlight

Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

Platforms

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

共用方式為