CredentialCache.GetEnumerator-Methode

Gibt einen Enumerator zurück, der die CredentialCache-Instanz durchlaufen kann.

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

Syntax

'Declaration
Public Function GetEnumerator As IEnumerator
'Usage
Dim instance As CredentialCache
Dim returnValue As IEnumerator

returnValue = instance.GetEnumerator

public IEnumerator GetEnumerator ()

public:
virtual IEnumerator^ GetEnumerator () sealed

public final IEnumerator GetEnumerator ()

public final function GetEnumerator () : IEnumerator

Rückgabewert

Ein IEnumerator für den CredentialCache.

Beispiel

Im folgenden Codebeispiel wird mit der GetEnumerator-Methode ein Enumerator zum Durchlaufen der CredentialCache-Instanz zurückgegeben.

    Try
        Dim myCredentialCache As New CredentialCache
        ' Dummy Credentials used here.             
        myCredentialCache.Add(New Uri("https://microsoft.com/"), "Basic", New NetworkCredential("user1", "passwd1", "domain1"))
        myCredentialCache.Add(New Uri("https://msdn.com/"), "Basic", New NetworkCredential("user2", "passwd2", "domain2"))

        myCredentialCache.Add(New Uri(url), "Basic", New NetworkCredential(userName, password, domainName))
        Dim myWebRequest As WebRequest = WebRequest.Create(url) 'Creates a webrequest with the specified url 
        myWebRequest.Credentials = myCredentialCache
        Dim listCredentials As IEnumerator = myCredentialCache.GetEnumerator()
        Console.WriteLine("Displaying credentials stored in CredentialCache: ")
        While listCredentials.MoveNext()
            Display(CType(listCredentials.Current, NetworkCredential))
        End While
        Console.WriteLine(ControlChars.Cr + "Now Displaying using 'foreach': ")
        ' Can use foreach with CredentialCache(Since GetEnumerator method of IEnumerable has been implemented by 'CredentialCache' class.
        Dim credential As NetworkCredential
        For Each credential In myCredentialCache
            Display(credential)
        Next credential
        Dim myWebResponse As WebResponse = myWebRequest.GetResponse() 'Sends the request and waits for response.
        ' Process the response here
        Console.WriteLine(ControlChars.Cr + "Response Received.")
        myWebResponse.Close()

    Catch e As WebException
        If Not (e.Response Is Nothing) Then
            Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "Failed to obtain a response. The following error occured : {0}", CType(e.Response, HttpWebResponse).StatusDescription)
        Else
            Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "Failed to obtain a response. The following error occured : {0}", e.Status)
        End If
    Catch e As Exception
        Console.WriteLine(ControlChars.Cr + "The following exception was raised : {0}", e.Message)
    End Try

End Sub 'GetPage

Public Shared Sub Display(credential As NetworkCredential)
    Console.WriteLine(ControlChars.Cr + "Username : {0} ,Password : {1} ,Domain : {2}", credential.UserName, credential.Password, credential.Domain)
End Sub 'Display

 public static void GetPage(string url,string userName,string password,string domainName)
   {
      try 
      {
          CredentialCache myCredentialCache = new CredentialCache();
          // Dummy Credentials used here.             
          myCredentialCache.Add(new Uri("https://microsoft.com/"),"Basic", new NetworkCredential("user1","passwd1","domain1"));
          myCredentialCache.Add(new Uri("https://msdn.com/"),"Basic", new NetworkCredential("user2","passwd2","domain2"));

          myCredentialCache.Add(new Uri(url),"Basic", new NetworkCredential(userName,password,domainName));    
          // Creates a webrequest with the specified url.                 
          WebRequest myWebRequest = WebRequest.Create(url);
          myWebRequest.Credentials = myCredentialCache;            
          IEnumerator listCredentials = myCredentialCache.GetEnumerator();
          
          Console.WriteLine("\nDisplaying credentials stored in CredentialCache: ");
          while(listCredentials.MoveNext())
          {
              Display((NetworkCredential)listCredentials.Current);
          }
          Console.WriteLine("\nNow Displaying the same using 'foreach' : ");
          // Can use foreach with CredentialCache(Since GetEnumerator function of IEnumerable has been implemented by 'CredentialCache' class.
          foreach(NetworkCredential credential in myCredentialCache)
              Display(credential);
          // Send the request and waits for response.
       WebResponse myWebResponse = myWebRequest.GetResponse(); 
          
         // Process response here.
          
         Console.WriteLine("\nResponse Received.");
          myWebResponse.Close();
                                
      } 
      catch(WebException e) 
      {
          if (e.Response != null)
              Console.WriteLine("\r\nFailed to obtain a response. The following error occured : {0}",((HttpWebResponse)(e.Response)).StatusDescription); 
          else
              Console.WriteLine("\r\nFailed to obtain a response. The following error occured : {0}",e.Status); 
      }
      catch(Exception e)
      {
          Console.WriteLine("\nThe following exception was raised : {0}",e.Message);
      }
}
public static void Display(NetworkCredential credential)
{
  Console.WriteLine("\n\tUsername : {0} ,Password : {1} ,Domain : {2}",credential.UserName,credential.Password,credential.Domain);
}

void Display( NetworkCredential^ credential )
{
   Console::WriteLine( "\n\tUsername : {0} , Password : {1} , Domain : {2}", credential->UserName, credential->Password, credential->Domain );
}

void GetPage( String^ url, String^ userName, String^ password, String^ domainName )
{
   try
   {
      CredentialCache^ myCredentialCache = gcnew CredentialCache;

      // Dummy Credentials used here.
      myCredentialCache->Add( gcnew Uri( "https://microsoft.com/" ), "Basic", gcnew NetworkCredential( "user1","passwd1","domain1" ) );
      myCredentialCache->Add( gcnew Uri( "https://msdn.com/" ), "Basic", gcnew NetworkCredential( "user2","passwd2","domain2" ) );
      myCredentialCache->Add( gcnew Uri( url ), "Basic", gcnew NetworkCredential( userName,password,domainName ) );

      // Creates a webrequest with the specified url.
      WebRequest^ myWebRequest = WebRequest::Create( url );
      myWebRequest->Credentials = myCredentialCache;
      IEnumerator^ listCredentials = myCredentialCache->GetEnumerator();
      Console::WriteLine( "\nDisplaying credentials stored in CredentialCache: " );
      while ( listCredentials->MoveNext() )
            Display( dynamic_cast<NetworkCredential^>(listCredentials->Current) );
      Console::WriteLine( "\nNow Displaying the same using 'foreach' : " );

      // Can use foreach with CredentialCache(Since GetEnumerator function of IEnumerable* has been implemented by 'CredentialCache' class.
      IEnumerator^ myEnum = myCredentialCache->GetEnumerator();
      while ( myEnum->MoveNext() )
      {
         NetworkCredential^ credential = safe_cast<NetworkCredential^>(myEnum->Current);
         Display( credential );
      }
      WebResponse^ myWebResponse = myWebRequest->GetResponse();

      // Process response here.
      Console::WriteLine( "\nResponse Received." );
      myWebResponse->Close();
   }
   catch ( WebException^ e ) 
   {
      if ( e->Response != nullptr )
            Console::WriteLine( "\r\nFailed to obtain a response. The following error occured : {0}", (dynamic_cast<HttpWebResponse^>(e->Response))->StatusDescription );
      else
            Console::WriteLine( "\r\nFailed to obtain a response. The following error occured : {0}", e->Status );
   }
   catch ( Exception^ e ) 
   {
      Console::WriteLine( "\nThe following exception was raised : {0}", e->Message );
   }
}

public static void GetPage(String url, String userName, String password, 
    String domainName)
{
    try {
        CredentialCache myCredentialCache = new CredentialCache();

        // Dummy Credentials used here.             
        myCredentialCache.Add(new Uri("https://microsoft.com/"), "Basic", 
            new NetworkCredential("user1", "passwd1", "domain1"));
        myCredentialCache.Add(new Uri("https://msdn.com/"), "Basic", 
            new NetworkCredential("user2", "passwd2", "domain2"));
        myCredentialCache.Add(new Uri(url), "Basic", 
            new NetworkCredential(userName, password, domainName));

        // Creates a webrequest with the specified url.                 
        WebRequest myWebRequest = WebRequest.Create(url);
        myWebRequest.set_Credentials(myCredentialCache);
        IEnumerator listCredentials = myCredentialCache.GetEnumerator();
        Console.WriteLine("\nDisplaying credentials stored in "
            + "CredentialCache: ");
        while (listCredentials.MoveNext()) {
            Display((NetworkCredential)listCredentials.get_Current());
        }
        Console.WriteLine("\nNow Displaying the same using 'foreach' : ");
        IEnumerator myEnumerator = myCredentialCache.GetEnumerator();
        while (myEnumerator.MoveNext()) {
            NetworkCredential credential = (NetworkCredential)myEnumerator.
                get_Current();

            // Can use foreach with CredentialCache(Since GetEnumerator 
            // function of IEnumerable has been implemented by 
            // 'CredentialCache' class.
            Display(credential);
        }

        // Send the request and waits for response.
        WebResponse myWebResponse = myWebRequest.GetResponse();

        // Process response here.
        Console.WriteLine("\nResponse Received.");
        myWebResponse.Close();
    }
    catch (WebException e) {
        if (e.get_Response() != null) {
            Console.WriteLine("\r\nFailed to obtain a response. "
                + "The following error occured : {0}", 
                ((HttpWebResponse)e.get_Response()).get_StatusDescription());
        }
        else {
            Console.WriteLine("\r\nFailed to obtain a response. "
                + "The following error occured : {0}", e.get_Status());
        }
    }
    catch (System.Exception e) {
        Console.WriteLine("\nThe following exception was raised : {0}", 
            e.get_Message());
    }
} //GetPage

public static void Display(NetworkCredential credential)
{
    Console.WriteLine("\n\tUsername : {0} ,Password : {1} ,Domain : {2}", 
        credential.get_UserName(), credential.get_Password(), credential.
        get_Domain());
} //Display

Plattformen

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile für Pocket PC, Windows Mobile für Smartphone, 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

.NET Compact Framework

Unterstützt in: 2.0

Siehe auch

Referenz

CredentialCache-Klasse
CredentialCache-Member
System.Net-Namespace