WebRequest wq = WebRequest.Create(this.address); HttpWebRequest hq = wq as HttpWebRequest; string username = "keguangqiang@163.com"; string password = "3216731ks"; string appkey = "5786724301"; System.Net.CredentialCache cache = new CredentialCache(); cache.Add(new Uri(this.address), "Basic", new NetworkCredential(username, password)); hq.Credentials = cache; hq.Headers.Add("Authorization","Basic " +Convert.ToBase64String(new System.Text.ASCIIEncoding().GetBytes(username+":"+password))); System.Net.WebResponse webresponse = hq.GetResponse(); System.IO.Stream receiveStream = webresponse.GetResponseStream(); System.IO.StreamReader reader = new System.IO.StreamReader(receiveStream, System.Text.Encoding.UTF8); string json = reader.ReadToEnd();