创建PerformanceCounter“ NetworkInterface CurrentBandwidth *”时，C＃InvalidOperationException

Question

When I try to create an instance of System.Diagnostics.PerformanceCounter class with the following parameters:

categoryName = NetworkInterface,  
counterName = CurrentBandwidth, 
instanceName = *.

I get an exception System.InvalidOperationException: Instance '*' does not exist in the specified Category.

I don't understand why star sign doesn't work for selecting all the instances in the category. In PerfMon it's used and it works.

Any ideas?

Answer 1

the answer is in your question: you want to create an instance, ie. one instance. PercormanceCounter does not return a collection of counters, which would be required when you want to select with a wildcard.

to enumerate all instances, see here: https://stackoverflow.com/a/1305159/3961759