DnsPermission-Konstruktor

Erstellt eine neue Instanz der DnsPermission-Klasse, die entweder uneingeschränkten oder keinen DNS-Zugriff ermöglicht.

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

Syntax

'Declaration
Public Sub New ( _
    state As PermissionState _
)
'Usage
Dim state As PermissionState

Dim instance As New DnsPermission(state)

public DnsPermission (
    PermissionState state
)

public:
DnsPermission (
    PermissionState state
)

public DnsPermission (
    PermissionState state
)

public function DnsPermission (
    state : PermissionState
)

Parameter

• state
  Einer der PermissionState-Werte.

Ausnahmen

Hinweise

Wenn state den Wert Unrestricted hat, sind bei der DnsPermission-Instanz alle Anforderungen erfolgreich. Wenn state einen anderen Wert enthält, schlagen bei der DnsPermission-Instanz alle Anforderungen fehl.

Beispiel

Im nächsten Beispiel wird eine Instanz der DnsPermission-Klasse erstellt.

Public Sub useDns()
    ' Create a DnsPermission instance.
    Dim permission As New DnsPermission(PermissionState.Unrestricted)
    
    ' Check for permission.
    permission.Demand()
    ' Create a SecurityElement object to hold XML encoding of the DnsPermission instance.
    Dim securityElementObj As SecurityElement = permission.ToXml()
    Console.WriteLine("Tag, Attributes and Values of 'DnsPermission' instance :")
    Console.WriteLine((ControlChars.Cr + ControlChars.Tab + "Tag :" + securityElementObj.Tag))
    ' Print the attributes and values.
    PrintKeysAndValues(securityElementObj.Attributes)
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.Cr + 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

public void useDns() {

   // Create a DnsPermission instance.
   DnsPermission permission = new DnsPermission(PermissionState.Unrestricted);

   // Check for permission.
   permission.Demand();
   // Create a SecurityElement object to hold XML encoding of the DnsPermission instance.
   SecurityElement securityElementObj = permission.ToXml();    
   Console.WriteLine("Tag, Attributes and Values of 'DnsPermission' instance :");
   Console.WriteLine("\n\tTag :" + securityElementObj.Tag);
   // Print the attributes and values.
   PrintKeysAndValues(securityElementObj.Attributes);
}

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

public:
   void useDns()
   {
      // Create a DnsPermission instance.
      DnsPermission^ permission = gcnew DnsPermission( PermissionState::Unrestricted );
      
      // Check for permission.
      permission->Demand();
      // Create a SecurityElement Object* to hold XML encoding of the DnsPermission instance.
      SecurityElement^ securityElementObj = permission->ToXml();
      Console::WriteLine( "Tag, Attributes and Values of 'DnsPermission' instance :" );
      Console::WriteLine( "\n\tTag : {0}", securityElementObj->Tag );
      // Print the attributes and values.
      PrintKeysAndValues( securityElementObj->Attributes );
   }

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

public void UseDns()
{
    // Create a DnsPermission instance.
    DnsPermission permission = new DnsPermission(PermissionState.
        Unrestricted);

    // Check for permission.
    permission.Demand();

    // Create a SecurityElement object to hold XML encoding of the
    // DnsPermission instance.
    SecurityElement securityElementObj = permission.ToXml();
    Console.WriteLine("Tag, Attributes and Values of 'DnsPermission' "
        + "instance :");
    Console.WriteLine("\n\tTag :" + securityElementObj.get_Tag());

    // Print the attributes and values.
    PrintKeysAndValues(securityElementObj.get_Attributes());
} //UseDns

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

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