根据进程 ID 获取进程 CPU 占用和内存占用等信息（C#）

根据进程 ID 获取进程 CPU 占用和内存占用等信息（C#）

代码参考

  PerformanceCounter? cpuCounter = null;
  PerformanceCounter? ramCounter = null;
  PerformanceCounter? ramCounter2 = null;
  // PerformanceCounter? ramCounter3 = null;

  var performanceCounterCategory = new PerformanceCounterCategory("Process");
  var instanceNames = performanceCounterCategory.GetInstanceNames();
  foreach (var instanceName in instanceNames)
  {
      try
      {
          var counter = new PerformanceCounter("Process", "ID Process", instanceName, true);
          if (counter.RawValue == Pid)
          {
              cpuCounter = new PerformanceCounter("Process", "% Processor Time", instanceName);
              ramCounter = new PerformanceCounter("Process", "Working Set", instanceName);
              ramCounter2 = new PerformanceCounter("Process", "Private Bytes", instanceName);
              // ramCounter3 = new PerformanceCounter(".NET CLR Memory", "# Gen 2 Collections", instanceName);
              break;
          }
      }
      catch (Exception e)
      {
          continue;
      }
  }

  if (cpuCounter == null || ramCounter == null || ramCounter2 == null)
  {
      return null;
  }

  var cpu = cpuCounter.NextValue();
  var ram = ramCounter.NextValue() / (1024.0 * 1024);
  var ram2 = ramCounter2.NextValue() / (1024.0 * 1024);
  // var ram3 = ramCounter3.NextValue() / (1024.0 * 1024);

参考资料

c# - Performance Counter by Process ID instead of name? - Stack Overflow
.net - Get CPU Usage for Process by Process ID - Stack Overflow