CredentialCache.GetEnumerator 方法

定義

命名空間:

System.Net

組件:

System.Net.Primitives.dll

來源:

CredentialCache.cs

傳回可以逐一查看 CredentialCache 執行個體的列舉值。

public:
 virtual System::Collections::IEnumerator ^ GetEnumerator();

public System.Collections.IEnumerator GetEnumerator ();

abstract member GetEnumerator : unit -> System.Collections.IEnumerator
override this.GetEnumerator : unit -> System.Collections.IEnumerator

Public Function GetEnumerator () As IEnumerator

傳回

IEnumerator

IEnumerator 的 CredentialCache。

實作

GetEnumerator()

範例

下列程式代碼範例會 GetEnumerator 使用 方法來傳回可逐一查看 實例的 CredentialCache 列舉值。

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( "http://microsoft.com/" ), "Basic", gcnew NetworkCredential( "user1","passwd1","domain1" ) );
      myCredentialCache->Add( gcnew Uri( "http://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 occurred : {0}", (dynamic_cast<HttpWebResponse^>(e->Response))->StatusDescription );
      else
            Console::WriteLine( "\r\nFailed to obtain a response. The following error occurred : {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("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 occurred : {0}",((HttpWebResponse)(e.Response)).StatusDescription);
          else
              Console.WriteLine("\r\nFailed to obtain a response. The following error occurred : {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);
}

    Try
        Dim myCredentialCache As 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))
        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 occurred : {0}", CType(e.Response, HttpWebResponse).StatusDescription)
        Else
            Console.WriteLine(ControlChars.Lf + ControlChars.Cr + "Failed to obtain a response. The following error occurred : {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

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