SecurityPermission.Union 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和集合を表すアクセス許可を作成します。

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

パラメータ

• target
  現在のアクセス許可と和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和集合を表す新しいアクセス許可。

実装

IPermission.Union

例外

解説

Union を呼び出すと、現在のアクセス許可と指定したアクセス許可の両方が表す操作をすべて表すアクセス許可が作成されます。いずれかのアクセス許可を要求し、その要求が満たされた場合、両者の和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

 
' Union creates a new permission that is the union of the current permission and 
' the specified permission.
Private Function UnionDemo() As Boolean
    Dim returnValue As Boolean = True
    Dim Security1, Security2 As SecurityPermissionFlag
    Dim SecurityPerm1, SecurityPerm2 As SecurityPermission
    Dim SecurityPerm3 As IPermission
    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.Union(SecurityPerm2), SecurityPermission)
            SecurityPerm3 = SecurityPerm1.Union(SecurityPerm2)

            If SecurityPerm3 Is Nothing Then
                Console.WriteLine(("The union of " & Security1 & " and " & Security2 & " is null."))
            Else
                Console.WriteLine(("The union of " & SecurityPerm1.Flags.ToString() _
                & " and " & SecurityPerm2.Flags.ToString() & " = " & CType(SecurityPerm3, SecurityPermission).Flags.ToString().ToString()))
            End If
ContinueWhile2:
        End While
ContinueWhile1:
    End While


    Return returnValue
End Function 'UnionDemo


[C#] 
// Union creates a new permission that is the union of the current permission and the specified permission.
private bool UnionDemo()
{
    bool returnValue = true;
    SecurityPermissionFlag Security1,Security2;
    SecurityPermission SecurityPerm1,SecurityPerm2;
    IPermission 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.Union(SecurityPerm2);
            SecurityPerm3 = SecurityPerm1.Union(SecurityPerm2);

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

        }
    }

    return returnValue;

}

[C++] 
// Union creates a new permission that is the union of the current permission and the specified permission.
bool UnionDemo()
{
    bool returnValue = true;
    SecurityPermissionFlag Security1,Security2;
    SecurityPermission* SecurityPerm1;
    SecurityPermission* SecurityPerm2;
    IPermission* 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->Union(SecurityPerm2));
            SecurityPerm3 = SecurityPerm1->Union(SecurityPerm2);

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

        }
    }

    return returnValue;

}

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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