WebClient.UseDefaultCredentials Property


Gets or sets a Boolean value that controls whether the DefaultCredentials are sent with requests.

 property bool UseDefaultCredentials { bool get(); void set(bool value); };
public bool UseDefaultCredentials { get; set; }
member this.UseDefaultCredentials : bool with get, set
Public Property UseDefaultCredentials As Boolean

Property Value


true if the default credentials are used; otherwise false. The default value is false.


The following code example demonstrates setting this property.

// Sample call: UploadFileInBackground3("http://www.contoso.com/fileUpload.aspx", "data.txt")
void UploadFileInBackground3( String^ address, String^ fileName )
   WebClient^ client = gcnew WebClient;
   Uri ^uri = gcnew Uri(address);

   client->UseDefaultCredentials = true;
   client->UploadFileCompleted += gcnew UploadFileCompletedEventHandler( UploadFileCallback2 );
   client->UploadFileAsync( uri, fileName );
   Console::WriteLine( "File upload started." );

// Sample call: UploadFileInBackground3("http://www.contoso.com/fileUpload.aspx", "data.txt")
public static void UploadFileInBackground3 (string address, string fileName)
    WebClient client = new WebClient ();

    Uri uri = new Uri(address);

    client.UseDefaultCredentials = true;
    client.UploadFileCompleted += new UploadFileCompletedEventHandler (UploadFileCallback2);
    client.UploadFileAsync (uri, fileName);
    Console.WriteLine ("File upload started.");

'  Sample call: UploadFileInBackground3("http:' www.contoso.com/fileUpload.aspx", "data.txt")
Public Shared Sub UploadFileInBackground3(ByVal address As String, ByVal fileName As String)

    Dim client As WebClient = New WebClient()
                Dim uri as Uri =  New Uri(address)
    client.UseDefaultCredentials = True
    AddHandler client.UploadFileCompleted, AddressOf UploadFileCallback2
    client.UploadFileAsync(uri, fileName)
    Console.WriteLine("File upload started.")
End Sub


Set this property to true when requests made by this WebClient object should, if requested by the server, be authenticated using the default credentials of the currently logged on user. For client applications, this is the desired behavior in most scenarios. For middle tier applications, such as ASP.NET applications, instead of using this property, you would typically set the Credentials property to the credentials of the client on whose behalf the request is made.

Applies to