SecurityPermission.Intersect メソッド

現在のアクセス許可と指定したアクセス許可の積集合を表すアクセス許可を作成して返します。

Overrides Public Function Intersect( _
   ByVal target As IPermission _) As IPermission Implements IPermission.Intersect
[C#]
public override IPermission Intersect(IPermissiontarget);
[C++]
public: IPermission* Intersect(IPermission* target);
[JScript]
public override function Intersect(
   target : IPermission) : IPermission;

パラメータ

• target
  現在のアクセス許可との積集合を持つアクセス許可。これは、現在のアクセス許可と同じ型であることが必要です。

戻り値

現在のアクセス許可と指定したアクセス許可の積集合を表す新しいアクセス許可オブジェクト。積集合が空の場合、この新しいアクセス許可は null 参照 (Visual Basic では Nothing) です。

実装

IPermission.Intersect

例外

解説

2 つのアクセス許可の積集合となるアクセス許可には、両方に共通する状態が記述されています。2 つのアクセス許可を要求し、その両方について要求が満たされる場合にだけ、それらの積集合を表すアクセス許可に対する要求も満たされます。

使用例

 
' Intersect creates and returns a new permission that is the intersection of the current 
' permission and the permission specified.
Private Function IntersectDemo() As Boolean
    Dim returnValue As Boolean = True
    Dim Security1, Security2 As SecurityPermissionFlag
    Dim SecurityPerm1, SecurityPerm2, SecurityPerm3 As SecurityPermission
    Dim SecurityGen1 As New SecurityGenerator()
    Dim SecurityGen2 As New SecurityGenerator()
    SecurityGen1.ResetIndex()
    While SecurityGen1.CreateSecurity(SecurityPerm1, Security1)
        If SecurityPerm1 Is Nothing Then
            GoTo ContinueWhile1
        End If
        Console.WriteLine("**********************************************************" & ControlChars.Lf)
        SecurityGen2.ResetIndex()

        While SecurityGen2.CreateSecurity(SecurityPerm2, Security2)
            If SecurityPerm2 Is Nothing Then
                GoTo ContinueWhile2
            End If
            SecurityPerm3 = CType(SecurityPerm1.Intersect(SecurityPerm2), SecurityPermission)
            If Not (SecurityPerm3 Is Nothing) Then
                Console.WriteLine(("The intersection of " & Security1.ToString() & " and " _
                & Security2.ToString() & " = " _
                & CType(SecurityPerm3, SecurityPermission).Flags.ToString().ToString()))
            Else
                Console.WriteLine(("The intersection of " & Security1.ToString() & " and " _
                & Security2.ToString() & " is null."))
            End If
ContinueWhile2:
        End While
ContinueWhile1:
    End While

    Return returnValue
End Function 'IntersectDemo


[C#] 
// Intersect creates and returns a new permission that is the intersection of the current 
// permission and the permission specified.
private bool IntersectDemo()
{
    bool returnValue = true;
    SecurityPermissionFlag Security1,Security2;
    SecurityPermission SecurityPerm1,SecurityPerm2,SecurityPerm3;
    SecurityGenerator SecurityGen1 = new SecurityGenerator();
    SecurityGenerator SecurityGen2 = new SecurityGenerator();
    SecurityGen1.ResetIndex();
    while(SecurityGen1.CreateSecurity(out SecurityPerm1, out Security1)) 
    {
        if(SecurityPerm1 == null) continue;
        Console.WriteLine("**********************************************************\n");
        SecurityGen2.ResetIndex();

        while(SecurityGen2.CreateSecurity(out SecurityPerm2, out Security2)) 
        {
            if(SecurityPerm2 == null) continue;

            SecurityPerm3 = (SecurityPermission)SecurityPerm1.Intersect(SecurityPerm2);
            if (SecurityPerm3 != null)
            {
                Console.WriteLine("The intersection of " + Security1 + " and " + Security2 + " = " + 
                    ((SecurityPermission)SecurityPerm3).Flags.ToString());
            }
            else
            {
                Console.WriteLine("The intersection of " + Security1 + " and " + Security2 + " is null." );
            }
        }
    }

    return returnValue;
}

[C++] 
// Intersect creates and returns a new permission that is the intersection of the current 
// permission and the permission specified.
bool IntersectDemo()
{
    bool returnValue = true;
    SecurityPermissionFlag Security1,Security2;
    SecurityPermission* SecurityPerm1;
    SecurityPermission* SecurityPerm2;
    SecurityPermission* SecurityPerm3;
    SecurityGenerator* SecurityGen1 = new SecurityGenerator();
    SecurityGenerator* SecurityGen2 = new SecurityGenerator();
    SecurityGen1->ResetIndex();
    while(SecurityGen1->CreateSecurity(&SecurityPerm1, &Security1)) 
    {
        if(SecurityPerm1 == 0) continue;
        Console::WriteLine(S"**********************************************************\n");
        SecurityGen2->ResetIndex();

        while(SecurityGen2->CreateSecurity(&SecurityPerm2, &Security2)) 
        {
            if(SecurityPerm2 == 0) continue;

            SecurityPerm3 = dynamic_cast<SecurityPermission*>(SecurityPerm1->Intersect(SecurityPerm2));
            if (SecurityPerm3 != 0)
            {
                Console::WriteLine(S"The intersection of {0} and {1} = {2}",
                    __box(Security1), __box(Security2),
                    __box((dynamic_cast<SecurityPermission*>(SecurityPerm3))->Flags));
            }
            else
            {
                Console::WriteLine(S"The intersection of {0} and {1} is null.", __box(Security1), __box(Security2));
            }
        }
    }

    return returnValue;
}

[JScript] JScript のサンプルはありません。Visual Basic、C#、および C++ のサンプルを表示するには、このページの左上隅にある言語のフィルタ ボタン をクリックします。

必要条件

プラットフォーム: Windows 98, Windows NT 4.0, Windows Millennium Edition, Windows 2000, Windows XP Home Edition, Windows XP Professional, Windows Server 2003 ファミリ, Common Language Infrastructure (CLI) Standard

参照

SecurityPermission クラス | SecurityPermission メンバ | System.Security.Permissions 名前空間