CodeAccessPermission.RevertAll メソッド

.NET Framework クラス ライブラリ リファレンス

CodeAccessPermission.RevertAll メソッド

現在のフレームに対する以前のオーバーライドをすべて削除し、無効にします。

名前空間: System.Security
アセンブリ: mscorlib (mscorlib.dll 内)
構文

Visual Basic (宣言)

Public Shared Sub RevertAll

Visual Basic (使用法)

CodeAccessPermission.RevertAll

C#

public static void RevertAll
 ()

C++

public:
static void RevertAll ()

J#

public static void RevertAll
 ()

JScript

public static function RevertAll
 ()

例外

例外の種類	条件
ExecutionEngineException	現在のフレームには、Assert、Deny、または PermitOnly が存在しません。

解説

現在のフレームに対するオーバーライド (Assert、Deny、または PermitOnly) が存在しない場合、ExecutionEngineException がスローされます。

使用例

RevertAll メソッドを使用して、現在のフレームに対する以前のオーバーライドを元に戻す方法を次のコード例に示します。

Visual Basic

Imports System
Imports System.Security
Imports System.Security.Permissions
Imports System.IO



Class UIPermissions

    Public Shared Sub Main()
        Try
            ' Create a new UIPermission that allows access only to OwnClipboard.
            Dim clipboardPermission As New
 UIPermission(UIPermissionClipboard.OwnClipboard)
            ' Deny access to OwnClipboard.
            Console.WriteLine("Denying access to OwnClipboard")
            clipboardPermission.Deny()
            ' Demand access to files in the specified path.
            DemandOwnClipboardAccess()
            ' Revert the Deny.
            Console.WriteLine("Reverting the Deny.")
            CodeAccessPermission.RevertDeny()
            DemandOwnClipboardAccess()
            ' Grant access only to OwnClipboard.
            Console.WriteLine("Granting permission only for OwnClipboard
 access.")
            clipboardPermission.PermitOnly()
            DemandAllClipboardAccess()
            ' Revert the PermitOnly with a call to RevertPermitOnly.
            Console.WriteLine("Reverting the PermitOnly.")
            CodeAccessPermission.RevertPermitOnly()
            DemandAllClipboardAccess()
            ' Permit access only to OwnClipboard.
            clipboardPermission.PermitOnly()
            DemandAllClipboardAccess()
            ' Revert the PermitOnly with a call to RevertAll.
            Console.WriteLine("Reverting the PermitOnly using
 RevertAll.")
            CodeAccessPermission.RevertAll()
            DemandAllClipboardAccess()

            Console.WriteLine("This sample completed successfully;
 " + _
                "press Enter to exit.")
            Console.ReadLine()
        Catch e As Exception
            Console.WriteLine("Unexpected exception thrown: "
 + vbLf + e.ToString())
            Console.ReadLine()
        End Try

    End Sub 'Main


    ' Determine whether OwnClipboard can be accessed.
    Private Shared Sub DemandOwnClipboardAccess()
        Try
            ' Create a new UIPermission that allows access to OwnClipboard.
            Dim clipboardPermission As New
 UIPermission(UIPermissionClipboard.OwnClipboard)

            ' Verify that callers higher in the stack have been granted
            ' the permission.
            Console.WriteLine("Demanding OwnClipboard access.")
            clipboardPermission.Demand()
            Console.WriteLine("The demand was successful")
        Catch ex As SecurityException
            Console.WriteLine("A security exception was thrown
 while " + _
                "demanding OwnClipboard access permission "
 + vbLf)
            Console.WriteLine(ex.Message)
        Catch ex As Exception
            Console.WriteLine("A fatal exception occurred:"
 + vbLf + ex.ToString())
        End Try

    End Sub 'DemandOwnClipboardAccess


    ' Determine whether OwnClipboard can be accessed.
    Private Shared Sub DemandAllClipboardAccess()
        Try
            ' Create a new UIPermission that allows access to OwnClipboard.
            Dim clipboardPermission As New
 UIPermission(UIPermissionClipboard.AllClipboard)

            ' Verify that callers higher in the stack have been granted
            ' the permission.
            Console.WriteLine("Demanding AllClipboard access.")
            clipboardPermission.Demand()
            Console.WriteLine("The demand was successful")
        Catch ex As SecurityException
            Console.WriteLine("A security exception was thrown
 while " + _
                "demanding AllClipboard access permission "
 + vbLf)
            Console.WriteLine(ex.Message)
        Catch ex As Exception
            Console.WriteLine("A fatal exception occurred:"
 + vbLf + ex.ToString())
        End Try

    End Sub 'DemandAllClipboardAccess
End Class 'UIPermissions

C#

using System;
using System.Security;
using System.Security.Permissions;
using System.IO;

class UIPermissions
{
    public static void Main()
    {
        try
        {
            // Create a new UIPermission that allows access only to
 OwnClipboard.
            UIPermission clipboardPermission = new UIPermission(UIPermissionClipboard.OwnClipboard);
            // Deny access to OwnClipboard.
            Console.WriteLine("Denying access to OwnClipboard");
            clipboardPermission.Deny();
            // Demand access to files in the specified path.
            DemandOwnClipboardAccess();
            // Revert the Deny.
            Console.WriteLine("Reverting the Deny.");
            CodeAccessPermission.RevertDeny();
            DemandOwnClipboardAccess();
            // Grant access only to OwnClipboard.
            Console.WriteLine("Granting permission only for
 OwnClipboard access.");
            clipboardPermission.PermitOnly();
            DemandAllClipboardAccess();
            // Revert the PermitOnly with a call to RevertPermitOnly.
            Console.WriteLine("Reverting the PermitOnly.");
            CodeAccessPermission.RevertPermitOnly();
            DemandAllClipboardAccess();
            // Permit access only to OwnClipboard.
            clipboardPermission.PermitOnly();
            DemandAllClipboardAccess();
            // Revert the PermitOnly with a call to RevertAll.
            Console.WriteLine("Reverting the PermitOnly using
 RevertAll.");
            CodeAccessPermission.RevertAll();
            DemandAllClipboardAccess();


            Console.WriteLine("This sample completed successfully; " +
                "press Enter to exit.");
            Console.ReadLine();
        }
        catch (Exception e)
        {
            Console.WriteLine("Unexpected exception thrown: \n" + e.ToString());
            Console.ReadLine();
        }
    }

    // Determine whether OwnClipboard can be accessed.
    private static void
 DemandOwnClipboardAccess()
    {
        try
        {
            // Create a new UIPermission that allows access to OwnClipboard.
            UIPermission clipboardPermission = new UIPermission(UIPermissionClipboard.OwnClipboard);

            // Verify that callers higher in the stack have been granted
            // the permission.
            Console.WriteLine("Demanding OwnClipboard access.");
            clipboardPermission.Demand();
            Console.WriteLine("The demand was successful");
        }
        catch (SecurityException ex)
        {
            Console.WriteLine("A security exception was thrown while
 " +
                "demanding OwnClipboard access permission \n");
            Console.WriteLine(ex.Message);
        }
        catch (Exception ex)
        {
            Console.WriteLine("A fatal exception occurred:\n" +
                ex.ToString());
        }
    }

    // Determine whether OwnClipboard can be accessed.
    private static void
 DemandAllClipboardAccess()
    {
        try
        {
            // Create a new UIPermission that allows access to OwnClipboard.
            UIPermission clipboardPermission = new UIPermission(UIPermissionClipboard.AllClipboard);

            // Verify that callers higher in the stack have been granted
            // the permission.
            Console.WriteLine("Demanding AllClipboard access.");
            clipboardPermission.Demand();
            Console.WriteLine("The demand was successful");
        }
        catch (SecurityException ex)
        {
            Console.WriteLine("A security exception was thrown while
 " +
                "demanding AllClipboard access permission \n");
            Console.WriteLine(ex.Message);
        }
        catch (Exception ex)
        {
            Console.WriteLine("A fatal exception occurred:\n" +
                ex.ToString());
        }
    }
}

C++

using namespace System;
using namespace System::Security;
using namespace System::Security::Permissions;
using namespace System::IO;

ref class UIPermissions
{
public:
   static void Main()
   {
      try
      {
         // Create a new UIPermission that allows access only to OwnClipboard.
         UIPermission^ clipboardPermission = gcnew UIPermission(
            UIPermissionClipboard::OwnClipboard );
         
         // Deny access to OwnClipboard.
         Console::WriteLine( L"Denying access to OwnClipboard" );
         clipboardPermission->Deny();
         
         // Demand access to files in the specified path.
         DemandOwnClipboardAccess();
         
         // Revert the Deny.
         Console::WriteLine( L"Reverting the Deny." );
         CodeAccessPermission::RevertDeny();
         DemandOwnClipboardAccess();

         // Grant access only to OwnClipboard.
         Console::WriteLine( L"Granting permission only for
 OwnClipboard access." );
         clipboardPermission->PermitOnly();
         DemandAllClipboardAccess();
         
         // Revert the PermitOnly with a call to RevertPermitOnly.
         Console::WriteLine( L"Reverting the PermitOnly." );
         CodeAccessPermission::RevertPermitOnly();
         DemandAllClipboardAccess();

         // Permit access only to OwnClipboard.
         clipboardPermission->PermitOnly();
         DemandAllClipboardAccess();
         
         // Revert the PermitOnly with a call to RevertAll.
         Console::WriteLine( L"Reverting the PermitOnly using
 RevertAll." );
         CodeAccessPermission::RevertAll();
         DemandAllClipboardAccess();

         Console::WriteLine( L"This sample completed successfully; "
             L"press Enter to exit." );
         Console::ReadLine();
      }
      catch ( Exception^ e ) 
      {
         Console::WriteLine( L"Unexpected exception thrown: \n{0}", e );
         Console::ReadLine();
      }
   }

private:
   // Determine whether OwnClipboard can be accessed.
   static void DemandOwnClipboardAccess()
   {
      try
      {
         // Create a new UIPermission that allows access to OwnClipboard.
         UIPermission^ clipboardPermission =
            gcnew UIPermission( UIPermissionClipboard::OwnClipboard );
         
         // Verify that callers higher in the stack have been granted
         // the permission.
         Console::WriteLine( L"Demanding OwnClipboard access." );
         clipboardPermission->Demand();
         Console::WriteLine( L"The demand was successful" );
      }
      catch ( SecurityException^ ex ) 
      {
         Console::WriteLine( L"A security exception was thrown while
 "
         L"demanding OwnClipboard access permission \n" );
         Console::WriteLine( ex->Message );
      }
      catch ( Exception^ ex ) 
      {
         Console::WriteLine( L"A fatal exception occurred:\n{0}", ex );
      }
   }

   // Determine whether OwnClipboard can be accessed.
   static void DemandAllClipboardAccess()
   {
      try
      {
         // Create a new UIPermission that allows access to OwnClipboard.
         UIPermission^ clipboardPermission =
            gcnew UIPermission( UIPermissionClipboard::AllClipboard );
         
         // Verify that callers higher in the stack have been granted
         // the permission.
         Console::WriteLine( L"Demanding AllClipboard access." );
         clipboardPermission->Demand();
         Console::WriteLine( L"The demand was successful" );
      }
      catch ( SecurityException^ ex ) 
      {
         Console::WriteLine( L"A security exception was thrown while
 "
         L"demanding AllClipboard access permission \n" );
         Console::WriteLine( ex->Message );
      }
      catch ( Exception^ ex ) 
      {
         Console::WriteLine( L"A fatal exception occurred:\n{0}", ex );
      }
   }

};

int main()
{
   UIPermissions::Main();
}

プラットフォーム

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。

バージョン情報

.NET Framework
サポート対象 : 2.0、1.1、1.0

参照

関連項目
CodeAccessPermission クラス
CodeAccessPermission メンバ
System.Security 名前空間