DnsPermissionAttribute(SecurityAction) Konstruktor

Definition

Namespace:

System.Net

Assembly:

System.Security.Permissions.dll

Paket:

System.Security.Permissions v8.0.0

Quelle:

DnsPermissionAttribute.cs

Initialisiert eine neue Instanz der DnsPermissionAttribute-Klasse mit dem angegebenen SecurityAction-Wert.

public:
 DnsPermissionAttribute(System::Security::Permissions::SecurityAction action);

public DnsPermissionAttribute (System.Security.Permissions.SecurityAction action);

new System.Net.DnsPermissionAttribute : System.Security.Permissions.SecurityAction -> System.Net.DnsPermissionAttribute

Public Sub New (action As SecurityAction)

Parameter

action

SecurityAction

Einer der SecurityAction-Werte.

Ausnahmen

ArgumentException

Der action-Parameter ist kein gültiger SecurityAction.

Beispiele

Im folgenden Beispiel wird verwendet DnsPermissionAttribute , um deklarative Sicherheit auf eine benutzerdefinierte Klasse anzuwenden.

//Uses the DnsPermissionAttribute to restrict access only to those who have permission.

[DnsPermission(SecurityAction::Demand,Unrestricted=true)]
public ref class MyClass
{
public:
   static IPAddress^ GetIPAddress()
   {
      IPAddress^ ipAddress = Dns::Resolve( "localhost" )->AddressList[ 0 ];
      return ipAddress;
   }

};

int main()
{
   try
   {
      
      //Grants Access.
      Console::WriteLine( " Access granted\n The local host IP Address is :{0}", MyClass::GetIPAddress() );
   }
   // Denies Access.
   catch ( SecurityException^ securityException ) 
   {
      Console::WriteLine( "Access denied" );
      Console::WriteLine( securityException->ToString() );
   }

}

public class MyClass
{
    public static IPAddress GetIPAddress()
    {
        IPAddress ipAddress = Dns.Resolve("localhost").AddressList[0];
        return ipAddress;
    }
    public static void Main()
    {
        try
        {
            //Grants Access.
            Console.WriteLine(" Access granted\n The local host IP Address is :" +
                                  MyClass.GetIPAddress().ToString());
        }
        // Denies Access.
        catch (SecurityException securityException)
        {
            Console.WriteLine("Access denied");	
            Console.WriteLine(securityException.ToString());
        }
    }
}

' Uses the DnsPermissionAttribute to restrict access only to those who have permission.
<DnsPermission(SecurityAction.Demand, Unrestricted := true)>  _
Public Class MyClass1
   
   Public Shared Function GetIPAddress() As IPAddress
      Dim ipAddress As IPAddress = Dns.Resolve("localhost").AddressList(0)
      Return ipAddress
   End Function 'GetIPAddress
   
   Public Shared Sub Main()
      Try
         ' Grants Access.
         Console.WriteLine(("Access granted" + ControlChars.NewLine + " The local host IP Address is :" + MyClass1.GetIPAddress().ToString()))
      ' Denies Access.
      Catch securityException As SecurityException
         Console.WriteLine("Access denied")
         Console.WriteLine(securityException.ToString())
      End Try
   End Sub
End Class

Hinweise

Der SecurityAction An diesen Konstruktor übergebene Wert gibt die zulässigen DnsPermissionAttribute Ziele an.

Weitere Informationen

• SecurityAction