列出某個類別的所有性能計數器

Question

System.Diagnostics中是否存在用於檢索給定CategoryName的所有實例化性能計數器的內置方法？

我們有一些使用自定義性能計數器的多線程應用程序，現在需要添加一個儀表板來顯示性能統計信息。

我想使儀表板以這樣的方式進行，即當有人向新的代碼段添加新的計數器時不需要更新儀表板。

Answer 1

試試這個：

public void ListCounters(string categoryName) 
{ 
    PerformanceCounterCategory category = PerformanceCounterCategory.GetCategories().First(c => c.CategoryName == categoryName); 
    Console.WriteLine("{0} [{1}]", category.CategoryName, category.CategoryType); 

    string[] instanceNames = category.GetInstanceNames(); 

    if (instanceNames.Length > 0) 
    { 
     // MultiInstance categories 
     foreach (string instanceName in instanceNames) 
     { 
      ListInstances(category, instanceName); 
     } 
    } 
    else 
    { 
     // SingleInstance categories 
     ListInstances(category, string.Empty); 
    } 
} 

private static void ListInstances(PerformanceCounterCategory category, string instanceName) 
{ 
    Console.WriteLine(" {0}", instanceName); 
    PerformanceCounter[] counters = category.GetCounters(instanceName); 

    foreach (PerformanceCounter counter in counters) 
    { 
     Console.WriteLine("  {0}", counter.CounterName); 
    } 
} 

你必須要知道，可以有多個實例，並與處理略有不同類別。

Answer 2

只是爲了好玩..這裏是在1線LINQ同樣的事情：

PerformanceCounterCategory 
.GetCategories() 
.Where(cat => cat.CategoryName == "ASP.NET v4.0.30319") 
.Select (cat => cat.GetInstanceNames().Any() ? cat.GetInstanceNames().Select (i => cat.GetCounters(i)).SelectMany (counter => counter) : cat.GetCounters("")).SelectMany (counter => counter) 
.Select(counter => string.Format("{0} : {1}.{2}", counter.InstanceName , counter.CategoryName, counter.CounterName))