CredentialCache.GetEnumerator Метод
Определение
Важно!
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Возвращает перечислитель, с помощью которого можно выполнять итерацию элементов экземпляра CredentialCache.
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
Возвращаемое значение
Интерфейс IEnumerator для CredentialCache.
Реализации
Примеры
В следующем примере кода метод используется GetEnumerator для возврата перечислителя, который может выполнять итерацию по экземпляру CredentialCache .
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
Применяется к
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