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CredentialCache.GetEnumerator Method

Returns an enumerator that can iterate through the CredentialCache instance.

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

public IEnumerator GetEnumerator()

Implements

IEnumerable.GetEnumerator()

The following code example uses the GetEnumerator method to return an enumerator that can iterate through the CredentialCache instance.

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("http://microsoft.com/"),"Basic", new NetworkCredential("user1","passwd1","domain1"));
          myCredentialCache.Add(new Uri("http://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(S"\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 = new CredentialCache();
      // Dummy Credentials used here.
      myCredentialCache->Add(new Uri(S"http://microsoft.com/"), S"Basic",
         new NetworkCredential(S"user1", S"passwd1", S"domain1"));
      myCredentialCache->Add(new Uri(S"http://msdn.com/"), S"Basic",
         new NetworkCredential(S"user2", S"passwd2", S"domain2"));

      myCredentialCache->Add(new Uri(url), S"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(S"\nDisplaying credentials stored in CredentialCache: ");
      while(listCredentials->MoveNext())
         Display(dynamic_cast<NetworkCredential*>(listCredentials->Current));
      Console::WriteLine(S"\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 = __try_cast<NetworkCredential*>(myEnum->Current);
         Display(credential);
      }
      // Send the request and waits for response.
      WebResponse* myWebResponse = myWebRequest->GetResponse();

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

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98, Windows CE, Windows Mobile for Smartphone, Windows Mobile for Pocket PC

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 3.5, 2.0

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