Download speed for Open Hardware Monitor

Question

I'm making some changes for Open Hardware Monitor. I will add the network adapter download and upload speed. But when I calculate the download speed I get a wrong calculation.

I can't use a timer to calculate the correct download speed because of the auto update in OHM. In the source here you can see how I calculate the download speed (in Mb/s).

In the construct of the class i do:

IPv4InterfaceStatistics interfaceStats = netInterfaces.GetIPv4Statistics();

bytesSent = interfaceStats.BytesSent;
bytesReceived = interfaceStats.BytesReceived;

stopWatch = new Stopwatch();
stopWatch.Start();

When the update method is called (in some random times) I do this:

IPv4InterfaceStatistics interfaceStats = netInterfaces.GetIPv4Statistics();

stopWatch.Stop();
long time = stopWatch.ElapsedMilliseconds;

if (time != 0)
{
    long bytes = interfaceStats.BytesSent;
    long bytesCalc = ((bytes - bytesSent)*8);

    usedDownloadSpeed.Value = ((bytesCalc / time) * 1000)/1024;
    bytesSent = bytes;                 
}

Hope someone can see my issue?

Added screenshot

Answer 1

There where a few conversion issues with my previous code. Now I have this source and it works. Tnx all for answering.

    interfaceStats = netInterfaces.GetIPv4Statistics();

        //Calculate download speed
        downloadSpeed.Value = Convert.ToInt32(interfaceStats.BytesReceived - bytesPreviousReceived) / 1024F;

        bytesPreviousReceived = interfaceStats.BytesReceived;