以.NET客户端连接时间传输文件?

所以我问了一个关于使用C保护下载安全的问题。#( Securing Large Downloads Using C# and IIS 7 )我得到了一些关于如何做它的很好的建议(包括将文件读取到内存中,然后将其写入用户)。唯一的问题是,现在我正试图实现一些基本的日志记录,我撞上了一堵砖墙。以下是流式处理文件的代码:

public void StreamFile(string file_path)
{
    DateTime start;
    TimeSpan ts;
    FileStream fstream;
    string filename = Path.GetFileName(file_path);
    byte[] buffer = new byte[STREAM_BUFFER_SIZE];
    int count = 1, total = 0, seconds;

    // Open the file to read
    fstream = new FileStream("D:\\" + file_path, FileMode.Open, FileAccess.Read);

    // Set up the response headers
    Response.AddHeader("Content-Length", fstream.Length.ToString());
    Response.AddHeader("Content-Disposition", "attachment; filename=\"" + filename + "\"");
    Response.ContentType = "application/octet-stream";

    // If the user agent is Internet Explorer, we add one last header
    if (Request.UserAgent.Contains("MSIE"))
        Response.AddHeader("Content-Transfer-Encoding", "binary");

    // Start counting the time
    start = DateTime.Now;

    // Now, until the client disconnects, we stream the file
    while (Response.IsClientConnected)
    {
        // Read the file into the buffer
        count = fstream.Read(buffer, 0, buffer.Length);

        // If the buffer is empty, break out of the loop. We're done!
        if (count == 0)
            break;

        // Write to the output stream and push it to the user
        Response.OutputStream.Write(buffer, 0, count);
        Response.Flush();

        // Increment the total as well, this way we can know how much we've streamed
        total += count;
    }
    // The transfer is done! Close the connection.
    Response.Close();

    // Count the number of seconds
    ts = DateTime.Now - start;
    seconds = ts.Seconds + (60 * ts.Minutes) + (60 * 60 * ts.Hours); // Also, is there a better way to do this? This is laaaaaame!

    // Finally, log the transfer
    Logging.AddLog(Request["user"], file_path, total, count == 0, seconds);
}

好的,所以问题是,这个创建的日志条目表明文件是在将文件读取到内存所用的秒数内完成的,而不是用户下载的。我认为这应该是客户的反应,但显然不是。所以日志报告的文件下载时间是0-1秒,即使我中途停止下载,日志也说它提供了整个过程。

以前有人做过类似的事情,或者有什么想法可以让我在转账后得到实数?不幸的是,拥有这些信息是一个巨大的优先事项,或者我只是对它不屑一顾,将这两个值从日志中全部删除。