How to display bytes received per second in C#

问题

I'm trying to display the received bytes per second and have them displayed in the console once a second. The I am presented with a Invalid Operation Exception once it reaches .nextvalue.

PerformanceCounter NetworkDownSpeed = new PerformanceCounter("Network Interface", "Bytes Received/sec");
float CurrentNetworkDownSpeed = (int)NetworkDownSpeed.NextValue();

while (true)
{
    Console.WriteLine("Current Network Download Speed: {0}MB", CurrentNetworkDownSpeed);
    Thread.Sleep(1000);
}

回答1:

Sorry for answering after someone already did, but does this helps by any chance ?

private static void ShowNetworkTraffic()
{
    PerformanceCounterCategory performanceCounterCategory = new PerformanceCounterCategory("Network Interface");
    string instance = performanceCounterCategory.GetInstanceNames()[0]; // 1st NIC !
    PerformanceCounter performanceCounterSent = new PerformanceCounter("Network Interface", "Bytes Sent/sec", instance);
    PerformanceCounter performanceCounterReceived = new PerformanceCounter("Network Interface", "Bytes Received/sec", instance);

    for (int i = 0; i < 10; i++)
    {
        Console.WriteLine("bytes sent: {0}k\tbytes received: {1}k", performanceCounterSent.NextValue() / 1024, performanceCounterReceived.NextValue() / 1024);
        Thread.Sleep(500);
    }
}

From here.

回答2:

NetworkDownSpeed.NextValue() can throw InvalidOperationException.

In NetworkDownSpeed.NextValue there is a comment that details the why.

// If the category does not exist, create the category and exit.
// Performance counters should not be created and immediately used.
// There is a latency time to enable the counters, they should be created
// prior to executing the application that uses the counters.
// Execute this sample a second time to use the category.

An alternative solution that takes care of this issue can be found on this stack overflow post.

来源：https://stackoverflow.com/questions/32211577/how-to-display-bytes-received-per-second-in-c-sharp

标签

networking

byte

performancecounter