IsolatedStorageFilePermission.IsSubsetOf メソッドとは何？わかりやすく解説 Weblio辞書

すべての辞書から再検索する

.NET Framework クラスライブラリリファレンス

索引トップ用語の索引ランキング

IsolatedStorageFilePermission.IsSubsetOf メソッド

現在のアクセス許可が、指定したアクセス許可のサブセットかどうかを判断します。

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
 IsSubsetOf ( _
    target As IPermission _
) As Boolean

Visual Basic (使用法)

Dim instance As IsolatedStorageFilePermission
Dim target As IPermission
Dim returnValue As Boolean

returnValue = instance.IsSubsetOf(target)

public override bool IsSubsetOf (
    IPermission target
)

C++

public:
virtual bool IsSubsetOf (
    IPermission^ target
) override

public boolean IsSubsetOf (
    IPermission target
)

JScript

public override function IsSubsetOf (
    target : IPermission
) : boolean

パラメータ

target: サブセットの関係を調べる対象のアクセス許可。このアクセス許可は、現在のアクセス許可と同じ型である必要があります。

戻り値
現在のアクセス許可が、指定したアクセス許可のサブセットである場合は true。それ以外の場合は false。

例外

例外の種類	条件
ArgumentException	target パラメータが null 参照 (Visual Basic では Nothing) ではなく、現在のアクセス許可と同じ型でもありません。

解説

現在のアクセス許可で指定される操作の集合が、指定したアクセス許可に完全に含まれる場合、現在のアクセス許可オブジェクトは指定したアクセス許可オブジェクトのサブセットです。たとえば、C:\example.txt へのアクセス権を表すアクセス許可は、C:\ へのアクセス権を表すアクセス許可のサブセットです。このメソッドが true を返す場合、現在のアクセス許可が保護されたリソースに対して表すアクセス権は、指定したアクセス許可が表すアクセス権と同じか、またはそのサブセットです

使用例

IsSubsetOf 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 IsSubsetOfDemo()
    Console.WriteLine(ControlChars.Lf + "IsSubsetOf demo.")

    Dim isfp0 As New IsolatedStorageFilePermission(PermissionState.None)
    Dim isfp1 As New IsolatedStorageFilePermission(PermissionState.None)
    Dim isfp2 As New IsolatedStorageFilePermission(PermissionState.Unrestricted)
    Dim isfp3 As New IsolatedStorageFilePermission(PermissionState.Unrestricted)

    If isfp0.IsSubsetOf(isfp1) Then
        Console.WriteLine("PermissionState.None is a subset of
 PermissionState.None.")
    Else
        Console.WriteLine("IsSubsetOfDemo failed: PermissionState.None
 should be a subset of PermissionState.None")
    End If

    If isfp0.IsSubsetOf(isfp2) Then
        Console.WriteLine("PermissionState.None is a subset of
 PermissionState.Unrestricted.")
    Else
        Console.WriteLine("IsSubsetOfDemo failed: PermissionState.None
 should be a subset of PermissionState.Unrestricted")
    End If

    If Not isfp2.IsSubsetOf(isfp0) Then
        Console.WriteLine("PermissionState.Unrestricted is not
 a subset of PermissionState.None.")
    Else
        Console.WriteLine(("IsSubsetOfDemo failed: PermissionState.Unrestricted
 should not be a subset " + ControlChars.Lf + ControlChars.Tab + "of
 PermissionState.None"))
    End If

    If isfp2.IsSubsetOf(isfp3) Then
        Console.WriteLine("PermissionState.Unrestricted is a subset
 of PermissionState.Unrestricted.")
    Else
        Console.WriteLine(("IsSubsetOfDemo failed: Permissionstate.Unrestricted
 should be a subset of " + ControlChars.Lf + ControlChars.Tab + "PermissionState.Unrestricted"))
    End If
End Sub 'IsSubsetOfDemo

private void IsSubsetOfDemo()
{
    Console.WriteLine("\nIsSubsetOf demo.");

    IsolatedStorageFilePermission isfp0 = new IsolatedStorageFilePermission(PermissionState.None);
    IsolatedStorageFilePermission isfp1 = new IsolatedStorageFilePermission(PermissionState.None);
    IsolatedStorageFilePermission isfp2 = new IsolatedStorageFilePermission(PermissionState.Unrestricted);
    IsolatedStorageFilePermission isfp3 = new IsolatedStorageFilePermission(PermissionState.Unrestricted);

    if (isfp0.IsSubsetOf(isfp1))
    {
        Console.WriteLine
            ("PermissionState.None is a subset of PermissionState.None.");
    }
    else
    {
        Console.WriteLine
            ("IsSubsetOfDemo failed: PermissionState.None should be a subset
 of PermissionState.None");
    }

    if (isfp0.IsSubsetOf(isfp2))
    {
        Console.WriteLine
            ("PermissionState.None is a subset of PermissionState.Unrestricted.");
    }
    else
    {
        Console.WriteLine
            ("IsSubsetOfDemo failed: PermissionState.None should be a subset
 of PermissionState.Unrestricted");
    }

    if (!isfp2.IsSubsetOf(isfp0))
    {
        Console.WriteLine
            ("PermissionState.Unrestricted is not a subset of PermissionState.None.");
    }
    else
    {
        Console.WriteLine
            ("IsSubsetOfDemo failed: PermissionState.Unrestricted should not
 be a subset " +
            "\n\tof PermissionState.None");
    }

    if (isfp2.IsSubsetOf(isfp3))
    {
        Console.WriteLine
            ("PermissionState.Unrestricted is a subset of PermissionState.Unrestricted.");
    }
    else
    {
        Console.WriteLine
            ("IsSubsetOfDemo failed: Permissionstate.Unrestricted should be
 a subset of " +
            "\n\tPermissionState.Unrestricted");
    }

}

C++

void IsSubsetOfDemo()
{
   Console::WriteLine( "\nIsSubsetOf demo." );
   IsolatedStorageFilePermission^ isfp0 = gcnew IsolatedStorageFilePermission( PermissionState::None
 );
   IsolatedStorageFilePermission^ isfp1 = gcnew IsolatedStorageFilePermission( PermissionState::None
 );
   IsolatedStorageFilePermission^ isfp2 = gcnew IsolatedStorageFilePermission( PermissionState::Unrestricted
 );
   IsolatedStorageFilePermission^ isfp3 = gcnew IsolatedStorageFilePermission( PermissionState::Unrestricted
 );
   if ( isfp0->IsSubsetOf( isfp1 ) )
   {
      Console::WriteLine( "PermissionState.None is a subset of PermissionState.None."
 );
   }
   else
   {
      Console::WriteLine( "IsSubsetOfDemo failed: PermissionState.None should
 be a subset of PermissionState.None" );
   }

   if ( isfp0->IsSubsetOf( isfp2 ) )
   {
      Console::WriteLine( "PermissionState.None is a subset of PermissionState.Unrestricted."
 );
   }
   else
   {
      Console::WriteLine( "IsSubsetOfDemo failed: PermissionState.None should
 be a subset of PermissionState.Unrestricted" );
   }

   if (  !isfp2->IsSubsetOf( isfp0 ) )
   {
      Console::WriteLine( "PermissionState.Unrestricted is not a subset of PermissionState.None."
 );
   }
   else
   {
      Console::WriteLine( "IsSubsetOfDemo failed: PermissionState.Unrestricted
 should not be a subset "
      "\n\tof PermissionState.None" );
   }

   if ( isfp2->IsSubsetOf( isfp3 ) )
   {
      Console::WriteLine( "PermissionState.Unrestricted is a subset of PermissionState.Unrestricted."
 );
   }
   else
   {
      Console::WriteLine( "IsSubsetOfDemo failed: Permissionstate.Unrestricted
 should be a subset of "
      "\n\tPermissionState.Unrestricted" );
   }
}

private void IsSubsetOfDemo()
{
    Console.WriteLine("\nIsSubsetOf demo.");
    IsolatedStorageFilePermission isfp0 = 
        new IsolatedStorageFilePermission(PermissionState.None);
    IsolatedStorageFilePermission isfp1 = 
        new IsolatedStorageFilePermission(PermissionState.None);
    IsolatedStorageFilePermission isfp2 = 
        new IsolatedStorageFilePermission(PermissionState.Unrestricted);
    IsolatedStorageFilePermission isfp3 = 
        new IsolatedStorageFilePermission(PermissionState.Unrestricted);
    if (isfp0.IsSubsetOf(isfp1)) {
        Console.WriteLine("PermissionState.None is a subset of " 
            + "PermissionState.None.");
    }
    else {
        Console.WriteLine("IsSubsetOfDemo failed: PermissionState.None "
 
            + "should be a subset of PermissionState.None");
    }
    if (isfp0.IsSubsetOf(isfp2)) {
        Console.WriteLine("PermissionState.None is a subset of " 
        + "PermissionState.Unrestricted.");
    }
    else {
        Console.WriteLine("IsSubsetOfDemo failed: PermissionState.None "
 
            + "should be a subset of PermissionState.Unrestricted");
    }
    if (!(isfp2.IsSubsetOf(isfp0))) {
        Console.WriteLine("PermissionState.Unrestricted is not " 
            + "a subset of PermissionState.None.");
    }
    else {
        Console.WriteLine(("IsSubsetOfDemo failed: PermissionState." 
            + "Unrestricted should not be a subset " 
            + "\n\tof PermissionState.None"));
    }
    if (isfp2.IsSubsetOf(isfp3)) {
        Console.WriteLine("PermissionState.Unrestricted is a " 
            + "subset of PermissionState.Unrestricted.");
    }
    else {
        Console.WriteLine(("IsSubsetOfDemo failed: " 
            + "Permissionstate.Unrestricted should be a subset of " 
            + "\n\tPermissionState.Unrestricted"));
    }
} //IsSubsetOfDemo

プラットフォーム

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

このページでは「.NET Framework クラスライブラリリファレンス」からIsolatedStorageFilePermission.IsSubsetOf メソッドを検索した結果を表示しています。
Weblioに収録されているすべての辞書からIsolatedStorageFilePermission.IsSubsetOf メソッドを検索する場合は、下記のリンクをクリックしてください。

全ての辞書からIsolatedStorageFilePermission.IsSubsetOf メソッドを検索

>> 「IsolatedStorageFilePermission.IsSubsetOf メソッド」を含む用語の索引
IsolatedStorageFilePermission.IsSubsetOf メソッドのページへのリンク


	© 2025 Microsoft.All rights reserved.

IsolatedStorageFilePermission.IsSubsetOf メソッドとは？ わかりやすく解説

IsolatedStorageFilePermission.IsSubsetOf メソッド

急上昇のことば

IsolatedStorageFilePermission.IsSubsetOf メソッドとは？わかりやすく解説