WebClient MyWebClient = new WebClient();                 MyWebClient.Credentials = CredentialCache.DefaultCredentials;//獲取或設(shè)置用于向Internet資源的請求進(jìn)行身份驗(yàn)證的網(wǎng)絡(luò)憑據(jù)Byte[] pageData = MyWebClient.DownloadData("http://www.baidu.com");//string pageHtml = Encoding.Default.GetString(pageData);  FileStream file = new FileStream("C://test.html", FileMode.Create); file.Write(pageData, 0, pageData.Length);

private string GetWebClient(string url){  string strHTML = "";  WebClient myWebClient = new WebClient();  Stream myStream = myWebClient.OpenRead(url);  StreamReader sr = new StreamReader(myStream, System.Text.Encoding.GetEncoding("utf-8"));  strHTML = sr.ReadToEnd();  myStream.Close();  return strHTML;}

private string GetWebRequest(string url){  Uri uri = new Uri(url);  WebRequest myReq = WebRequest.Create(uri);  WebResponse result = myReq.GetResponse();  Stream receviceStream = result.GetResponseStream();  StreamReader readerOfStream = new StreamReader(receviceStream, System.Text.Encoding.GetEncoding("utf-8"));  string strHTML = readerOfStream.ReadToEnd();  readerOfStream.Close();  receviceStream.Close();  result.Close();  return strHTML;}

private string GetHttpWebRequest(string url){  Uri uri = new Uri(url);  HttpWebRequest myReq = (HttpWebRequest)WebRequest.Create(uri);  myReq.UserAgent = "User-Agent:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; .NET CLR 1.0.3705";  myReq.Accept = "*/*";  myReq.KeepAlive = true;  myReq.Headers.Add("Accept-Language", "zh-cn,en-us;q=0.5");  HttpWebResponse result = (HttpWebResponse)myReq.GetResponse();  Stream receviceStream = result.GetResponseStream();  StreamReader readerOfStream = new StreamReader(receviceStream, System.Text.Encoding.GetEncoding("utf-8"));  string strHTML = readerOfStream.ReadToEnd();  readerOfStream.Close();  receviceStream.Close();  result.Close();  return strHTML;}