UrlIdentityPermission.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が表す URL へのアクセス権に加え、指定したアクセス許可が表す URL へのすべてのアクセス権を表すアクセス許可が作成されます。

現在のアクセス許可が、指定したアクセス許可と等しい場合、またはいずれかアクセス許可がワイルドカード演算子 ("*") を使用している場合、 UrlIdentityPermission は set 操作 (IsSubsetOf 、 Intersect 、および Union) だけをサポートします。

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 url1, url2 As String
    Dim urlIdPerm1, urlIdPerm2 As UrlIdentityPermission
    Dim urlIdPerm3 As IPermission

    Dim urlGen1 As New UrlGenerator()
    Dim urlGen2 As New UrlGenerator()

    urlGen1.ResetIndex()
    While urlGen1.CreateUrl(urlIdPerm1, url1)
        If urlIdPerm1 Is Nothing Then
            GoTo ContinueWhile1
        End If
        Console.WriteLine("**********************************************************" & ControlChars.Lf)
        urlGen2.ResetIndex()
        While urlGen2.CreateUrl(urlIdPerm2, url2)

            Try
                If urlIdPerm2 Is Nothing Then
                    GoTo ContinueWhile2
                End If
                Dim firstPermission As String = IIf(url1 = "" Or url1 Is Nothing, "null", url1)
                Dim secondPermission As String = IIf(url2 = "" Or url2 Is Nothing, "null", url2)
                urlIdPerm3 = CType(urlIdPerm1.Union(urlIdPerm2), UrlIdentityPermission)
                urlIdPerm3 = urlIdPerm1.Union(urlIdPerm2)

                If urlIdPerm3 Is Nothing Then
                    Console.WriteLine("The union of " & firstPermission & "  and " & ControlChars.Lf & ControlChars.Tab & secondPermission & " is null.")
                Else
                    Console.WriteLine("The union of " & firstPermission & "  and " & ControlChars.Lf & ControlChars.Tab & secondPermission & " = " & ControlChars.Lf & ControlChars.Tab & CType(urlIdPerm3, UrlIdentityPermission).Url.ToString())
                End If
            Catch e As Exception
                Console.WriteLine("An exception was thrown for union :" & e.ToString())
                returnValue = False
            End Try
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;

    string url1,url2;
    UrlIdentityPermission urlIdPerm1,urlIdPerm2;
    IPermission urlIdPerm3;

    UrlGenerator urlGen1 = new UrlGenerator();
    UrlGenerator urlGen2 = new UrlGenerator();

    urlGen1.ResetIndex();
    while(urlGen1.CreateUrl(out urlIdPerm1, out url1)) 
    {
        if(urlIdPerm1 == null) continue;
        
        Console.WriteLine("**********************************************************\n");
        urlGen2.ResetIndex();
            while(urlGen2.CreateUrl(out urlIdPerm2, out url2)) 
            {

                try
                {
                    if(urlIdPerm2 == null) continue;

                    string firstPermission = url1 == "" | url1 == null ? "null" : url1 ;
                    string secondPermission = url2 == "" | url2 == null ? "null" : url2;
                    urlIdPerm3 = (UrlIdentityPermission)urlIdPerm1.Union(urlIdPerm2);
                    urlIdPerm3 = urlIdPerm1.Union(urlIdPerm2);

                    if(urlIdPerm3 == null) 
                    {
                        Console.WriteLine("The union of " + firstPermission 
                            + "  and \n\t"  + secondPermission + " is null.");
                    }
                    else
                    {
                        Console.WriteLine("The union of " + firstPermission + "  and \n\t"  
                            + secondPermission + 
                            " = \n\t" + ((UrlIdentityPermission)urlIdPerm3).Url.ToString());
                    }
                }
                catch(Exception e) 
                {
                    Console.WriteLine("An exception was thrown for union :" + e);
                    returnValue=false;
                }

        }
        
    }

    return returnValue;

}

[C++] 
// Union creates a new permission that is the union of the current permission and
// the specified permission.
private:
bool UnionDemo() {

   bool returnValue = true;

   String* url1, *url2;
   UrlIdentityPermission* urlIdPerm1, *urlIdPerm2;
   IPermission* urlIdPerm3;

   UrlGenerator* urlGen1 = new UrlGenerator();
   UrlGenerator* urlGen2 = new UrlGenerator();

   urlGen1->ResetIndex();
   while(urlGen1->CreateUrl(&urlIdPerm1, &url1)) {
      if (urlIdPerm1 == 0) continue;

      Console::WriteLine(S"**********************************************************\n");
      urlGen2->ResetIndex();
      while(urlGen2->CreateUrl(&urlIdPerm2, &url2)) {
         try {
            if (urlIdPerm2 == 0) continue;

            String* firstPermission = url1->Equals(S"") || url1 == 0 ? S"null" : url1 ;
            String* secondPermission = url2->Equals(S"") || url2 == 0 ? S"null" : url2;
            urlIdPerm3 = dynamic_cast<UrlIdentityPermission*>(urlIdPerm1->Union(urlIdPerm2));
            urlIdPerm3 = urlIdPerm1->Union(urlIdPerm2);

            if (urlIdPerm3 == 0) {
               Console::WriteLine(S"The union of {0}  and \n\t{1} is null.",
                  firstPermission,
                  secondPermission);
            } else {
               Console::WriteLine(S"The union of {0}  and \n\t{1} = \n\t{2}",
                  firstPermission,
                  secondPermission,
                  (dynamic_cast<UrlIdentityPermission*>(urlIdPerm3))->Url);
            }
         } catch (Exception* e) {
            Console::WriteLine(S"An exception was thrown for union : {0}", e);
            returnValue=false;
         }
      }
   }
   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

参照

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