System.dll中发生了类型为'System.InvalidOperationException'的未处理异常

Question

I was executing code below :

class Program
{
    static void Main(string[] args)
    {
        PerformanceCounter performanceCounter = new PerformanceCounter("Network Interface", "Bytes Sent/sec", "Intel(R) 82579V Gigabit Network Connection");
        Console.WriteLine(performanceCounter.NextValue().ToString());
    }
}

I'm getting this exception.

An unhandled exception of type 'System.InvalidOperationException' occurred in System.dll Additional information: Instance 'Intel(R) 82579V Gigabit Network Connection' does not exist in the specified Category.

I have tested the parameters with windows perfmon tool , it was working but in code its giving exception.

Can anybody please help..

Answer 1

Have you checked if the name is spelled correctly? Even with a minor error, this most likely won't work.

To check which names exist in this category, try (as suggested here: https://stackoverflow.com/a/29270209/1648463 )

PerformanceCounterCategory category = new PerformanceCounterCategory("Network Interface");
String[] instancename = category.GetInstanceNames();

foreach (string name in instancename)
{
    Console.WriteLine(name);
}

For example, one of the existing names for network interfaces on my computer is

Intel[R] 82579LM Gigabit Network Connection

(with brackets instead of round brackets).