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CredentialCache.GetEnumerator Method

Returns an enumerator that can iterate through the CredentialCache instance.

Namespace:  System.Net
Assemblies:   System (in System.dll)
  System.Net.Primitives (in System.Net.Primitives.dll)

'Declaration
Public Function GetEnumerator As IEnumerator

Implements

IEnumerable.GetEnumerator

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

    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 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

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8
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