如何计算传输速率kb / s SOCKETS c#

时间:2012-01-15 23:09:20

标签: c# file sockets tcp

如何计算每秒千字节的传输速率,我使用秒表但它不起作用,因为它给我一个关于零的错误(计数/ 0)

    public void sendFile(string filePath)
    {
        Stopwatch stopWatch = new Stopwatch();
        FileInfo file = new FileInfo(filePath);
        try
        {
            int fileSize = (int)file.Length;
            Program.mainForm.MaxProgressBarHandler(fileSize);
            byte[] fileDetial;
            string detail =  file.Name + "," + fileSize.ToString();
            fileDetial = Encoding.ASCII.GetBytes(detail);
            client.Send(fileDetial);
            byte[] fileData = new byte[fileSize];

            int count;
            int sum = 0;
            file.OpenRead().Read(fileData, 0, fileSize);
            while (sum < fileSize)
            {
                stopWatch.Restart();
                if (fileSize - sum < packetSize)
                {
                    count = client.Send(fileData, sum, fileSize - sum, SocketFlags.None);
                    Program.mainForm.UpdateProgressBarHandler(count);
                }
                else
                {
                    count = client.Send(fileData, sum, packetSize, SocketFlags.None);
                    Program.mainForm.UpdateProgressBarHandler(count);
                }
                stopWatch.Stop();
                sum += count;
                Program.mainForm.AppendLabel(((fileSize * 8) / stopWatch.ElapsedMilliseconds).ToString());
                Console.WriteLine(sum + "of" + fileSize + "sent");
            }
        }
        finally
        {
            Console.WriteLine("sent");
            CloseClient();
        }
    }

请帮帮我=)

1 个答案:

答案 0 :(得分:1)

对于问题的第一部分,请查看此Joel On Software Forum Thread。它不是特定的.Net相关,而是直接处理使用TCP传输文件。

至于第二部分,由于我没有完整的代码,所以我无法理解为什么stopWatch.ElapsedMilliseconds等于零。我的猜测是没有数据要传输。您可以尝试做这样的事情以避免除以零错误。

if (stopWatch.ElapsedMilliseconds != 0)
    Program.mainForm.AppendLabel(((fileSize * 8) / stopWatch.ElapsedMilliseconds).ToString());

虽然我可能有1秒的计时器,并使sum成为一个类范围的变量并每隔一秒更新一次标签,例如:

public partial class Form1 : Form
{
    int sum = 0;
    int seconds = 0;
...

private void timer1_Tick(object sender, EventArgs e)
{
    seconds += 1;
    Program.mainForm.AppendLabel(((sum * 8) / seconds).ToString());
} 

并在完成转帐时重置它们。

....
finally        
    {        
        timer1.Stop();
        sum = 0;
        seconds = 0
        Console.WriteLine("sent");        
        CloseClient();        
    }