[C#]利用WebClient透過Proxy下載檔案,並處理進度更新及下載完成事件

如果沒有要透過Proxy下載檔案,可以將5,6,7,10行拿掉

   1: using System.Net;

   2:  

   3: public void Fatch(string url, string fileName)

   4: {

   5:     WebProxy webProxy = new WebProxy(ipString, port);

   6:     NetworkCredential networkCredential = new NetworkCredential(userNameString, passwordString);

   7:     webProxy.Credentials = networkCredential;

   8:  

   9:     WebClient webClient = new WebClient();

  10:     webClient.Proxy = webProxy;

  11:     

  12:     //處理下載完成事件

  13:     webClient.DownloadFileCompleted += new AsyncCompletedEventHandler(downloadCompletedCallback);

  14:     //處理進度更新事件    

  15:     webClient.DownloadProgressChanged +=new DownloadProgressChangedEventHandler(downloadProgressChangedCallback);

  16:     

  17:     webClient.DownloadFileAsync(new Uri(url), fileName);

  18: }

  19:  

  20: //處理下載完成事件

  21: private void downloadCompletedCallback(object sender, AsyncCompletedEventArgs e)

  22: {

  23:     Console.WriteLine("下載完成");    

  24: }

  25:  

  26:  

  27: //處理進度更新事件

  28: private void downloadProgressChangedCallback(object sender, DownloadProgressChangedEventArgs e)

  29: {

  30:     Console.WriteLine("進度(%) : " + e.ProgressPercentage);

  31:     Console.WriteLine("進度(bytes) : " +  e.BytesReceived  +"/" + e.TotalBytesToReceive);       

  32: }