C#文件下载、文件分块下载实例（一）

时间：2025-03-27 10:50:01

一、简单下载方式使用WebClient

/// <summary>
/// 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
/// </summary>
public static void Test1()
{
    //string url = "/video/11555";
    string url = "/98672526-02b5-454c-b31e-d8526755b40b/L.mp4?auth_key=1474171330-0-0-8ff3fe3a33cfd257577dfa999e41530d";

    DateTime start = ;
    Uri uri = new Uri(url);
    string filename = (("/") + 1);
    filename =  + "/data/" + filename;
    //指定url 下载文件
    WebClient client = new WebClient();
    (url, filename);
    ("下载文件成功,用时：" + ( - start).TotalSeconds + "秒");
}

二、分块下载

/// <summary>
/// 分段下载文件
/// 读取速度和分块大小、网速有关
/// </summary>
public static void Test3()
{
    string url = "/98672526-02b5-454c-b31e-d8526755b40b/L.mp4?auth_key=1474171330-0-0-8ff3fe3a33cfd257577dfa999e41530d";
    DateTime start = ;
    Uri uri = new Uri(url);
    string filename = (("/") + 1);
    filename =  + "/data/" + filename;
    //指定url 下载文件
    HttpWebRequest request = (HttpWebRequest)(url);
    Stream stream = ().GetResponseStream();
    //创建写入流
    FileStream fs = new FileStream(filename, , );
    byte[] bytes = new byte[1024 * 512];
    int readCount = 0;
    while (true)
    {
        readCount = (bytes, 0, );
        if (readCount <= 0)
            break;
        (bytes, 0, readCount);
        ();
    }
    ();
    ();
    ("下载文件成功,用时：" + ( - start).TotalSeconds + "秒");
}


更多：

C#下载实例二

C#下载实例（三）-断点下载

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