我的表演台在哪里？它已创建,但我无法在perfmon中看到它

Question

我有这段代码:我在哪里创建我的性能计数器.它执行正常,如果不存在,它也会创建性能计数器,但是当我使用perfmon时,我找不到这个性能计数器.

怎么了？

 const string _categoryName = "MyPerformanceCounter";
    if (!PerformanceCounterCategory.Exists(_categoryName))
    {
        CounterCreationDataCollection counters = new CounterCreationDataCollection();

        CounterCreationData ccdWorkingThreads = new CounterCreationData();
        ccdWorkingThreads.CounterName = "# working threads";
        ccdWorkingThreads.CounterHelp = "Total number of operations executed";
        ccdWorkingThreads.CounterType = PerformanceCounterType.NumberOfItems32;
        counters.Add(ccdWorkingThreads);

        // create new category with the counters above
        PerformanceCounterCategory.Create(_categoryName,
                "Performance counters of my app",
                PerformanceCounterCategoryType.SingleInstance,
                counters);
    }

Answer 1

没有收到任何异常的原因是缺少 try-catch 块。如果您像这样在 try 和 catch 块中添加语句

        try
        {                
            const string _categoryName = "MyPerformanceCounter";
            if (!PerformanceCounterCategory.Exists(_categoryName))
            {
                CounterCreationDataCollection counters = 
                new CounterCreationDataCollection();

                CounterCreationData ccdWorkingThreads = new CounterCreationData();
                ccdWorkingThreads.CounterName = "# working threads";
                ccdWorkingThreads.CounterHelp = "Total number of operations executed";
                ccdWorkingThreads.CounterType = PerformanceCounterType.NumberOfItems32;
                counters.Add(ccdWorkingThreads);

                // create new category with the counters above
                PerformanceCounterCategory.Create(_categoryName,
                        "Performance counters of my app",
                        PerformanceCounterCategoryType.SingleInstance,
                        counters);
            }                
        }
        catch(Exception ex)
        {
            MessageBox.Show(ex.ToString()); //Do necessary action
        }   

然后它将捕获异常。如果您看到类似“不允许请求的注册表访问”的异常。那么你需要管理权限才能做这些事情。要确认这一点，请使用管理权限运行 Visual Studio 并执行代码。