从其它站点下载文件到服务器

//声明一个请求

              WebRequest myWebRequest = WebRequest.Create("http://media.wiley.com/product_data/coverImage80/0X/07645786/076457860X.jpg");

 

              //穿过需要身份验证的代理服务器

              NetworkCredential myCred = new NetworkCredential("Stone Sun","XX","bqc");

              WebProxy myProxy = new WebProxy("bqcProxy", 80);

              myProxy.Credentials = myCred;

              myWebRequest.Proxy = myProxy;

              //声明来自请求的响应

              WebResponse wrs = myWebRequest.GetResponse();

              //声明要保存的文件,并将响应写入文件.

              FileStream fs = new FileStream("d:\\text.jpg", FileMode.Create);           

              BinaryWriter w = new BinaryWriter(fs);

              BinaryReader br = new BinaryReader(wrs.GetResponseStream());

              byte[] btTest = br.ReadBytes(1024);

              while(btTest.Length > 0)

              {

                   w.Write(btTest);

                   btTest.Initialize();

                   btTest = br.ReadBytes(1024);

              }

              br.Close();

              w.Close();

              fs.Close();