DnsPermission.Intersect(IPermission) Metode

Definisi

Ruang nama:

System.Net

Rakitan:

System.Security.Permissions.dll

Paket:

System.Security.Permissions v9.0.0-rc.2.24473.5

Sumber:

DnsPermission.cs

Membuat instans izin yang merupakan persimpangan instans izin saat ini dan instans izin yang ditentukan.

public:
 override System::Security::IPermission ^ Intersect(System::Security::IPermission ^ target);

public override System.Security.IPermission Intersect (System.Security.IPermission target);

override this.Intersect : System.Security.IPermission -> System.Security.IPermission

Public Overrides Function Intersect (target As IPermission) As IPermission

Parameter

target

IPermission

Instans DnsPermission untuk bersinggungan dengan instans saat ini.

Mengembalikan

IPermission

DnsPermission Instans yang mewakili persimpangan instans saat ini DnsPermission dengan instans yang ditentukanDnsPermission, atau null jika persimpangan kosong. Jika instans saat ini dan target tidak dibatasi, metode ini mengembalikan instans baru DnsPermission yang tidak dibatasi; jika tidak, instans akan nullmengembalikan .

Pengecualian

ArgumentException

target bukan atau DnsPermissionnull.

Contoh

Contoh berikut membuat instans izin yang merupakan persimpangan instans izin saat ini dan instans izin yang ditentukan.

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().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 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

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

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

Keterangan

Metode mengembalikan Intersect instans yang memungkinkan akses yang ditentukan oleh instans DnsPermission saat ini DnsPermission dan instans yang ditentukan DnsPermission . Setiap permintaan harus melewati kedua izin untuk melewati persimpangan mereka.