DnsPermission.Intersect-Methode

Erstellt eine Berechtigungsinstanz, die die Schnittmenge aus der aktuellen Berechtigungsinstanz und der angegebenen Berechtigungsinstanz ist.

Namespace: System.Net
Assembly: System (in system.dll)

Syntax

'Declaration
Public Overrides Function Intersect ( _
    target As IPermission _
) As IPermission
'Usage
Dim instance As DnsPermission
Dim target As IPermission
Dim returnValue As IPermission

returnValue = instance.Intersect(target)

public override IPermission Intersect (
    IPermission target
)

public:
virtual IPermission^ Intersect (
    IPermission^ target
) override

public IPermission Intersect (
    IPermission target
)

public override function Intersect (
    target : IPermission
) : IPermission

Parameter

• target
  Die DnsPermission-Instanz, von der mit der aktuellen Instanz eine Schnittmenge gebildet werden soll.

Rückgabewert

Eine DnsPermission-Instanz, die die Schnittmenge aus der aktuellen DnsPermission-Instanz und der angegebenen DnsPermission-Instanz darstellt oder NULL (Nothing in Visual Basic), wenn die Schnittmenge leer ist. Wenn die aktuelle Instanz und target uneingeschränkt sind, gibt diese Methode eine neue, uneingeschränkte DnsPermission-Instanz zurück, andernfalls wird NULL (Nothing in Visual Basic) zurückgegeben.

Ausnahmen

Hinweise

Die Intersect-Methode gibt eine DnsPermission-Instanz zurück, die den Zugriff ermöglicht, der durch die aktuelle DnsPermission-Instanz und die angegebene DnsPermission-Instanz definiert ist. Anforderungen müssen beide Berechtigungen erfolgreich durchlaufen, um deren Schnittmenge erfolgreich zu durchlaufen.

Beispiel

Im folgenden Beispiel wird eine Berechtigungsinstanz erstellt, die die Schnittmenge aus der aktuellen Berechtigungsinstanz und der angegebenen Berechtigungsinstanz ist.

Public Sub useDns()
    ' Create a DnsPermission instance.
    dnsPermission1 = New DnsPermission(PermissionState.Unrestricted)
    dnsPermission2 = New DnsPermission(PermissionState.None)
    ' Check for permission.
    dnsPermission1.Demand()
    dnsPermission2.Demand()
    Console.WriteLine("Attributes and Values of first DnsPermission instance :")
    PrintKeysAndValues(dnsPermission1.ToXml().Attributes)
    Console.WriteLine("Attributes and Values of second DnsPermission instance :")
    PrintKeysAndValues(dnsPermission2.ToXml().Attributes)
    Console.WriteLine("Union of both instances : ")
    MyUnion()
    Console.WriteLine("Intersection of both instances : ")
    MyIntersection()
End Sub 'useDns

Private Sub PrintKeysAndValues(myList As Hashtable)
    ' Get the enumerator that can iterate through the hash table.
    Dim myEnumerator As IDictionaryEnumerator = myList.GetEnumerator()
    Console.WriteLine(ControlChars.Tab + "-KEY-" + ControlChars.Tab + "-VALUE-")
    While myEnumerator.MoveNext()
        Console.WriteLine(ControlChars.Tab + "{0}:" + ControlChars.Tab + "{1}", myEnumerator.Key, myEnumerator.Value)
    End While
    Console.WriteLine()
End Sub 'PrintKeysAndValues

Private Sub MyIntersection()
    ' Create a DnsPermission instance that is the intersection of the current
    ' DnsPermission instance and the specified DnsPermission instance.
    Dim permission As DnsPermission = CType(dnsPermission1.Intersect(dnsPermission2), DnsPermission)
    ' Print the attributes and values of the intersection instance of DnsPermission.
    PrintKeysAndValues(permission.ToXml().Attributes)
End Sub 'MyIntersection

public void useDns() {
   // Create a DnsPermission instance.
   dnsPermission1 = new DnsPermission(PermissionState.Unrestricted);
   dnsPermission2 = new DnsPermission(PermissionState.None);
   // Check for permission.
   dnsPermission1.Demand();
   dnsPermission2.Demand();
   Console.WriteLine("Attributes and Values of first DnsPermission instance :");
   PrintKeysAndValues(dnsPermission1.ToXml().Attributes);
   Console.WriteLine("Attributes and Values of second DnsPermission instance :");
   PrintKeysAndValues(dnsPermission2.ToXml().Attributes);
   Console.WriteLine("Union of both instances : ");
   MyUnion();
   Console.WriteLine("Intersection of both instances : ");
   MyIntersection();
}

private void PrintKeysAndValues(Hashtable myList) {
   // Get the enumerator that can iterate through the hash tabble.
   IDictionaryEnumerator myEnumerator = myList.GetEnumerator();
   Console.WriteLine("\t-KEY-\t-VALUE-");
   while (myEnumerator.MoveNext())
      Console.WriteLine("\t{0}:\t{1}", myEnumerator.Key, myEnumerator.Value);
   Console.WriteLine();
}
   // Create a DnsPermission instance that is the intersection of current
   // DnsPermission instance and the specified DnsPermission instance.
private void MyIntersection()
{
   DnsPermission permission = (DnsPermission)dnsPermission1.Intersect(dnsPermission2);
   // Print the attributes and the values of the intersection instance of
   // DnsPermission.
   PrintKeysAndValues(permission.ToXml().Attributes);
}

public:
   void useDns()
   {
      // Create a DnsPermission instance.
      dnsPermission1 = gcnew DnsPermission( PermissionState::Unrestricted );
      dnsPermission2 = gcnew DnsPermission( PermissionState::None );
      // Check for permission.
      dnsPermission1->Demand();
      dnsPermission2->Demand();
      Console::WriteLine( "Attributes and Values of first DnsPermission instance :" );
      PrintKeysAndValues( dnsPermission1->ToXml()->Attributes );
      Console::WriteLine( "Attributes and Values of second DnsPermission instance :" );
      PrintKeysAndValues( dnsPermission2->ToXml()->Attributes );
      Console::WriteLine( "Union of both instances : " );
      MyUnion();
      Console::WriteLine( "Intersection of both instances : " );
      MyIntersection();
   }

private:
   void PrintKeysAndValues( Hashtable^ myList )
   {
      // Get the enumerator that can iterate through the hash tabble.
      IDictionaryEnumerator^ myEnumerator = myList->GetEnumerator();
      Console::WriteLine( "\t-KEY-\t-VALUE-" );
      while ( myEnumerator->MoveNext() )
      {
         Console::WriteLine( "\t {0}:\t {1}", myEnumerator->Key, myEnumerator->Value );
      }
      Console::WriteLine();
   }

   // Create a DnsPermission instance that is the intersection of current
   // DnsPermission instance and the specified DnsPermission instance.
   void MyIntersection()
   {
      DnsPermission^ permission = dynamic_cast<DnsPermission^>(dnsPermission1->Intersect( dnsPermission2 ));
      // Print the attributes and the values of the intersection instance of
      // DnsPermission.
      PrintKeysAndValues( permission->ToXml()->Attributes );
   }

public void UseDns()
{
    // Create a DnsPermission instance.
    dnsPermission1 = new DnsPermission(PermissionState.Unrestricted);
    dnsPermission2 = new DnsPermission(PermissionState.None);

    // Check for permission.
    dnsPermission1.Demand();
    dnsPermission2.Demand();
    Console.WriteLine("Attributes and Values of first DnsPermission "
        + "instance :");
    PrintKeysAndValues(dnsPermission1.ToXml().get_Attributes());
    Console.WriteLine("Attributes and Values of second DnsPermission "
        + "instance :");
    PrintKeysAndValues(dnsPermission2.ToXml().get_Attributes());
    Console.WriteLine("Union of both instances : ");
    MyUnion();
    Console.WriteLine("Intersection of both instances : ");
    MyIntersection();
} //UseDns

private void PrintKeysAndValues(Hashtable myList)
{
    // Get the enumerator that can iterate through the hash tabble.
    IDictionaryEnumerator myEnumerator = myList.GetEnumerator();
    Console.WriteLine("\t-KEY-\t-VALUE-");
    while (myEnumerator.MoveNext()) {
        Console.WriteLine("\t{0}:\t{1}", myEnumerator.get_Key(),
            myEnumerator.get_Value());
    }
    Console.WriteLine();
} //PrintKeysAndValues

// Create a DnsPermission instance that is the intersection of current
// DnsPermission instance and the specified DnsPermission instance.
private void MyIntersection()
{
    DnsPermission permission = (DnsPermission)dnsPermission1.
        Intersect(dnsPermission2);

    // Print the attributes and the values of the intersection instance of
    // DnsPermission.
    PrintKeysAndValues(permission.ToXml().get_Attributes());
} //MyIntersection

Plattformen

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

.NET Framework unterstützt nicht alle Versionen sämtlicher Plattformen. Eine Liste der unterstützten Versionen finden Sie unter Systemanforderungen.

Versionsinformationen

.NET Framework

Unterstützt in: 2.0, 1.1, 1.0

Siehe auch

Referenz

DnsPermission-Klasse
DnsPermission-Member
System.Net-Namespace