NetworkInterface.GetIPv4Statistics（）。BytesReceived - 它返回什么？

Question

What does that particular field return? I want the the number of bytes received per second. Should I rely on this?

Answer 1

I think you can use it that way:

long beginValue = NetworkInterface.GetIPv4Statistics().BytesReceived;
DateTime beginTime = DateTime.Now;

// do something

long endValue = NetworkInterface.GetIPv4Statistics().BytesReceived;
DateTime endTime = DateTime.Now;

long recievedBytes = endValue - beginValue;
double totalSeconds = (endTime - beginTime).TotalSeconds;

var bytesPerSecond = recievedBytes / totalSeconds;

Code Snippet for periodically update

private object _lockObj;
private long bytesPerSecond = 0;
private Timer _refreshTimer = new Timer { Interval = 1000 };

// do in ctor or some init method
_refreshTimer.Tick += _refreshTimer_Tick;
_refreshTimer.Enabled = true;

private void _refreshTimer_Tick(object sender, EventArgs e)
{
  ThreadPool.QueueUserItem(callback => 
  {
    long beginValue = NetworkInterface.GetIPv4Statistics().BytesReceived;
    DateTime beginTime = DateTime.Now;

    Thread.Sleep(1000);

    long endValue = NetworkInterface.GetIPv4Statistics().BytesReceived;
    DateTime endTime = DateTime.Now;

    long recievedBytes = endValue - beginValue;
    double totalSeconds = (endTime - beginTime).TotalSeconds;

    lock(_lockObj)
    {
      bytesPerSecond = recievedBytes / totalSeconds;
    }
  });

}

You can combine this with some tracking to record the recieved Bytes over time

Answer 2

NetworkInterface.GetIPv4Statistics().BytesReceived 

will show you the total number of bytes received for the given interface.

I dont think you can exactly use this to get the number of bytes received per second.

Check This

Answer 3

http://msdn.microsoft.com/en-us/library/system.net.networkinformation.ipv4interfacestatistics.bytesreceived.aspx

According to MSDN (as others have also pointed out) it Gets the number of bytes that were received on the interface.

How does it behave if, for example, the network interface is disconnected and reconnected (eg a network cable is pulled out or a wireless connection drops out).

If you want a much more reliable way to capture packets, filter them, dissect them and only count the ones that matter, then have a look at http://sourceforge.net/projects/sharppcap/