IsolatedStorageFilePermission.Copy メソッド

.NET Framework クラス ライブラリ リファレンス

IsolatedStorageFilePermission.Copy メソッド

現在のアクセス許可のコピーを作成して返します。

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

Visual Basic (宣言)

Public Overrides Function
 Copy As IPermission

Visual Basic (使用法)

Dim instance As IsolatedStorageFilePermission
Dim returnValue As IPermission

returnValue = instance.Copy

C#

public override IPermission Copy ()

C++

public:
virtual IPermission^ Copy () override

J#

public IPermission Copy ()

JScript

public override function Copy () : IPermission

戻り値
現在のアクセス許可のコピー。

解説

アクセス許可のコピーは、リソースに対して、コピー元のアクセス許可と同じアクセス権を表します。

使用例

Copy メソッドの使用方法を次のコード例に示します。このコード例は、IsolatedStorageFilePermission クラスのトピックで取り上げているコード例の一部分です。

Visual Basic

Private Sub Copy_EqualsDemo()
    Console.WriteLine(ControlChars.Lf + "Copy_Equals demo.")
    Console.WriteLine("Creating the first IsolatedStorageFilePermission(PermissionState.Unrestricted)
 permission.")
    Dim first As New IsolatedStorageFilePermission(PermissionState.Unrestricted)
    Console.WriteLine(("Hashcode for the first permission : "
 + first.GetHashCode().ToString()))
    Console.WriteLine("Copying the first permission.")
    Dim copyOfFirst As IsolatedStorageFilePermission
 = CType(first.Copy(), IsolatedStorageFilePermission)
    Console.WriteLine(("Hashcode for copy of the first permission:
 " + copyOfFirst.GetHashCode().ToString()))
    If False = copyOfFirst.Equals(first) Then
 ' This should be false, because the object references are different.
        Console.WriteLine(("The copy and the first permission
 should not be equal because they have " + ControlChars.Lf + ControlChars.Tab
 + "different object references."))
    Else
        Console.WriteLine(("Error: the copy and the first permission
 should not be equal because they have " + ControlChars.Lf + ControlChars.Tab
 + "different object references."))
    End If

    Console.WriteLine(("Does a comparison of copy of first permission
 to itself test equal??: " + IIf(copyOfFirst.Equals(copyOfFirst), "true",
 "false")))
    If False = copyOfFirst.Equals(copyOfFirst)
 Then
        Console.WriteLine("Copy_Equals demo failed because Equals
 returns false on two object.Equals(itself).")
    End If

    Console.WriteLine(("Does a comparison of first permission
 to itself test equal?: " + IIf(first.Equals(first), "true",
 "false")))
    If False = first.Equals(first) Then
        Console.WriteLine("Copy_Equals demo failed, because Equals
 returns false on two object.Equals(itself).")
    End If
    Console.WriteLine("Creating a second permission with PermissionState.None.")
    Dim second As New IsolatedStorageFilePermission(PermissionState.None)

    Console.WriteLine(("Does the first permission equal the second
 permission?: " + IIf(first.Equals(second), "true",
 "false")))
    If True = first.Equals(second) Then
        Console.WriteLine("Copy_Equals demo failed because Equals
 returns false on two object.Equals(itself).")
    End If
End Sub 'Copy_EqualsDemo

C#

private void Copy_EqualsDemo()
{
    Console.WriteLine
        ("\nCopy_Equals demo.");
    Console.WriteLine
        ("Creating the first IsolatedStorageFilePermission(PermissionState.Unrestricted)
 permission.");
    IsolatedStorageFilePermission first = new IsolatedStorageFilePermission(PermissionState.Unrestricted);
    Console.WriteLine
        ("Hashcode for the first permission : " + first.GetHashCode().ToString());
    Console.WriteLine
        ("Copying the first permission.");
    IsolatedStorageFilePermission copyOfFirst = (IsolatedStorageFilePermission)first.Copy();
    Console.WriteLine
        ("Hashcode for copy of the first permission: "
 + copyOfFirst.GetHashCode().ToString());
    if (false == copyOfFirst.Equals(first))
 // This should be false, because the object references are different.
    {
        Console.WriteLine
            ("The copy and the first permission should not be equal because
 they have " +
            "\n\tdifferent object references.");
    }
    else
    {
        Console.WriteLine
            ("Error: the copy and the first permission should not be equal because
 they have " +
            "\n\tdifferent object references.");
    }

    Console.WriteLine
        ("Does a comparison of copy of first permission to itself test equal??:
 "
        + (copyOfFirst.Equals(copyOfFirst)? "true":
 "false"));
    if (false == copyOfFirst.Equals(copyOfFirst))
    {
        Console.WriteLine
            ("Copy_Equals demo failed because Equals returns false
 on two object.Equals(itself).");
    }

    Console.WriteLine
        ("Does a comparison of first permission to itself test equal?: "
 + (first.Equals(first)? "true": "false"));
    if (false == first.Equals(first))
    {
        Console.WriteLine
            ("Copy_Equals demo failed, because Equals returns false
 on two object.Equals(itself).");
    }
    Console.WriteLine("Creating a second permission with PermissionState.None.");
    IsolatedStorageFilePermission second = new IsolatedStorageFilePermission(PermissionState.None);

    Console.WriteLine
        ("Does the first permission equal the second permission?: " + (first.Equals(second)?
 "true": "false"));
    if (true == first.Equals(second))
    {
        Console.WriteLine
            ("Copy_Equals demo failed because Equals returns false
 on two object.Equals(itself).");
    }
}

C++

void Copy_EqualsDemo()
{
   Console::WriteLine( "\nCopy_Equals demo." );
   Console::WriteLine( "Creating the first IsolatedStorageFilePermission(PermissionState.Unrestricted)
 permission." );
   IsolatedStorageFilePermission^ first = gcnew IsolatedStorageFilePermission( PermissionState::Unrestricted
 );
   Console::WriteLine( "Hashcode for the first permission
 : {0}", first->GetHashCode() );
   Console::WriteLine( "Copying the first permission." );
   IsolatedStorageFilePermission^ copyOfFirst = dynamic_cast<IsolatedStorageFilePermission^>(first->Copy());
   Console::WriteLine( "Hashcode for copy of the first permission:
 {0}", copyOfFirst->GetHashCode() );
   if ( false == copyOfFirst->Equals( first
 ) )
   {
      Console::WriteLine( "The copy and the first permission should not be equal
 because they have "
      "\n\tdifferent object references." );
   }
   else
   {
      Console::WriteLine( "Error: the copy and the first permission should not
 be equal because they have "
      "\n\tdifferent object references." );
   }

   Console::WriteLine( "Does a comparison of copy of first permission to itself
 test equal??: {0}", (copyOfFirst->Equals( copyOfFirst ) ? (String^)"true"
 : "false") );
   if ( false == copyOfFirst->Equals( copyOfFirst
 ) )
   {
      Console::WriteLine( "Copy_Equals demo failed because Equals returns false
 on two object.Equals(itself)." );
   }

   Console::WriteLine( "Does a comparison of first permission to itself test
 equal?: {0}", (first->Equals( first ) ? (String^)"true"
 : "false") );
   if ( false == first->Equals( first )
 )
   {
      Console::WriteLine( "Copy_Equals demo failed, because Equals returns false
 on two object.Equals(itself)." );
   }

   Console::WriteLine( "Creating a second permission with PermissionState.None."
 );
   IsolatedStorageFilePermission^ second = gcnew IsolatedStorageFilePermission( PermissionState::None
 );
   Console::WriteLine( "Does the first permission equal the second permission?:
 {0}", (first->Equals( second ) ? (String^)"true"
 : "false") );
   if ( true == first->Equals( second )
 )
   {
      Console::WriteLine( "Copy_Equals demo failed because Equals returns false
 on two object.Equals(itself)." );
   }
}

J#

private void Copy_EqualsDemo()
{
    Console.WriteLine("\nCopy_Equals demo.");
    Console.WriteLine("Creating the first " 
        + "IsolatedStorageFilePermission(PermissionState." 
        + "Unrestricted) permission.");
    IsolatedStorageFilePermission first = 
        new IsolatedStorageFilePermission(PermissionState.Unrestricted);
    Console.WriteLine(("Hashcode for the first permission
 : " 
        + System.Convert.ToString(first.GetHashCode())));
    Console.WriteLine("Copying the first permission.");
    IsolatedStorageFilePermission copyOfFirst = 
        ((IsolatedStorageFilePermission)(first.Copy()));
    Console.WriteLine(("Hashcode for copy of the first permission:
 " 
        + System.Convert.ToString(copyOfFirst.GetHashCode())));
    if (false == copyOfFirst.Equals(first))
 {
        // This should be false, because the object references are 
        // different.
        Console.WriteLine(("The copy and the first permission " 
            + "should not be equal because they have " 
            + "\n\tdifferent object references."));
    }
    else {
        Console.WriteLine(("Error: the copy and the first " 
            + "permission should not be equal because they have " 
            + "\n\tdifferent object references."));
    }
    Console.WriteLine("Does a comparison of copy of first " 
        + "permission to itself test equal??: " 
        + ((copyOfFirst.Equals(copyOfFirst)) ? "true"
 : "false"));
    if (false == copyOfFirst.Equals(copyOfFirst))
 {
        Console.WriteLine("Copy_Equals demo failed because Equals " 
            + "returns false on two object.Equals(itself).");
    }
    Console.WriteLine(("Does a comparison of first permission to " 
        + "itself test equal?: " 
        + ((first.Equals(first)) ? "true" : "false")));
    if (false == first.Equals(first)) {
        Console.WriteLine("Copy_Equals demo failed, because Equals " 
            + "returns false on two object.Equals(itself).");
    }
    Console.WriteLine("Creating a second permission with " 
        + "PermissionState.None.");
    IsolatedStorageFilePermission second = 
        new IsolatedStorageFilePermission(PermissionState.None);
    Console.WriteLine(("Does the first permission equal the " 
        + "second permission?: " 
        + ((first.Equals(second)) ? "true" : "false")));
    if (true == first.Equals(second)) {
        Console.WriteLine("Copy_Equals demo failed because Equals " 
            + "returns false on two object.Equals(itself).");
    }
} //Copy_EqualsDemo   

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
IsolatedStorageFilePermission クラス
IsolatedStorageFilePermission メンバ
System.Security.Permissions 名前空間