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一、简单下载方式使用WebClient

/// 
/// 简单下载方式/// 说明：对于大文件的下载，当前处理，会出现假死，长时间之后如果现在成功才相应/// 不能用户断点处理/// 
public static void Test1(){    //string url = "http://www.imooc.com/video/11555";    string url = "http://v2.mukewang.com/98672526-02b5-454c-b31e-d8526755b40b/L.mp4?auth_key=1474171330-0-0-8ff3fe3a33cfd257577dfa999e41530d";    DateTime start = DateTime.Now;    Uri uri = new Uri(url);    string filename = uri.AbsolutePath.Substring(uri.AbsolutePath.LastIndexOf("/") + 1);    filename = LocalPathHelper.CurrentSolution + "/data/" + filename;    //指定url 下载文件    WebClient client = new WebClient();    client.DownloadFile(url, filename);    Console.WriteLine("下载文件成功,用时：" + (DateTime.Now - start).TotalSeconds + "秒");}

二、分块下载

/// 
/// 分段下载文件/// 读取速度和分块大小、网速有关/// 
public static void Test3(){    string url = "http://v2.mukewang.com/98672526-02b5-454c-b31e-d8526755b40b/L.mp4?auth_key=1474171330-0-0-8ff3fe3a33cfd257577dfa999e41530d";    DateTime start = DateTime.Now;    Uri uri = new Uri(url);    string filename = uri.AbsolutePath.Substring(uri.AbsolutePath.LastIndexOf("/") + 1);    filename = LocalPathHelper.CurrentSolution + "/data/" + filename;    //指定url 下载文件    HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(url);    Stream stream = request.GetResponse().GetResponseStream();    //创建写入流    FileStream fs = new FileStream(filename, FileMode.Create, FileAccess.Write);    byte[] bytes = new byte[1024 * 512];    int readCount = 0;    while (true)    {        readCount = stream.Read(bytes, 0, bytes.Length);        if (readCount <= 0)            break;        fs.Write(bytes, 0, readCount);        fs.Flush();    }    fs.Close();    stream.Close();    Console.WriteLine("下载文件成功,用时：" + (DateTime.Now - start).TotalSeconds + "秒");}

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