DnsPermissionAttribute(SecurityAction) Oluşturucu

Tanım

Ad Alanı:

System.Net

Bütünleştirilmiş Kod:

System.Security.Permissions.dll

Belirtilen SecurityAction değerle sınıfının yeni bir örneğini DnsPermissionAttribute başlatır.

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)

Parametreler

action

SecurityAction

Değerlerden SecurityAction biri.

Özel durumlar

ArgumentException

action parametresi geçerli SecurityActionbir değil.

Örnekler

Aşağıdaki örnek, özel bir sınıfa bildirim temelli güvenlik uygulamak için kullanır DnsPermissionAttribute .

//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

Açıklamalar

SecurityAction Bu oluşturucuya geçirilen değer izin verilebilen DnsPermissionAttribute hedefleri belirtir.

Ayrıca bkz.

• SecurityAction