如何獲得在asp.net

Question

CPU使用率有沒有辦法顯示一個asp.net頁面上的CPU和內存使用情況的統計數據。我試過this代碼，但我有錯誤：

Access to the registry key 'Global' is denied. 

在這條線：正如在評論中提到

ramCounter = new PerformanceCounter("Memory", "Available MBytes"); 

Answer 1

，沒有相應的權限，您將無法做到這一點。資源統計將包括有關係統是特權信息

Answer 2

使用的其他用戶擁有的進程很多信息：

System.Diagnostics.PerformanceCounter cpuUsage = 
     new System.Diagnostics.PerformanceCounter(); 
    cpuUsage.CategoryName = "Processor"; 
    cpuUsage.CounterName = "% Processor Time"; 
    cpuUsage.InstanceName = "_Total"; 

    float f = cpuUsage.NextValue(); 

編輯：

的Windows限制訪問性能計數器那些管理員或性能日誌用戶（在Vista +中）組。設置註冊表安全無法解決此問題。有可能在某處附加了用戶權限。

Answer 3

用途：

new PerformanceCounter("Processor Information", "% Processor Time", "_Total"); 

相反的：

new PerformanceCounter("Processor", "% Processor Time", "_Total"); 

Answer 4

到不叫.NextValue（）兩次，您可以使用MVC「全局變量：

[AllowAnonymous] 
    [HttpGet] 
    [ActionName("serverusage")] 
    public HttpResponseMessage serverusage() 
    { 
     try 
     { 

      PerformanceCounter cpuCounter; 

      if (HttpContext.Current.Application["cpuobj"] == null) 
      { 
       cpuCounter = new PerformanceCounter(); 
       cpuCounter.CategoryName = "Processor"; 
       cpuCounter.CounterName = "% Processor Time"; 
       cpuCounter.InstanceName = "_Total"; 

       HttpContext.Current.Application["cpuobj"] = cpuCounter; 
      } 
      else 
      { 
       cpuCounter = HttpContext.Current.Application["cpuobj"] as PerformanceCounter; 
      } 

      JToken json; 
      try 
      { 
       json = JObject.Parse("{ 'usage' : '" + HttpContext.Current.Application["cpu"] + "'}"); 
      } 
      catch 
      { 
       json = JObject.Parse("{ 'usage' : '" + 0 + "'}"); 
      } 

       HttpContext.Current.Application["cpu"] = cpuCounter.NextValue(); 

      var response = Request.CreateResponse(System.Net.HttpStatusCode.OK); 
      response.Content = new JsonContent(json); 
      return response; 

     } 
     catch (Exception e) 
     { 
      var response = Request.CreateResponse(System.Net.HttpStatusCode.BadRequest); 
      JToken json = JObject.Parse("{ 'problem' : '" + e.Message + "'}"); 
      response.Content = new JsonContent(json); 
      return response; 

     } 

    } 
} 

公共類JsonContent ：HttpContent { private readonly JToken _value;

public JsonContent(JToken value) 
    { 
     _value = value; 
     Headers.ContentType = new MediaTypeHeaderValue("application/json"); 
    } 

    protected override Task SerializeToStreamAsync(Stream stream, 
     TransportContext context) 
    { 
     var jw = new JsonTextWriter(new StreamWriter(stream)) 
     { 
      Formatting = Formatting.Indented 
     }; 
     _value.WriteTo(jw); 
     jw.Flush(); 
     return Task.FromResult<object>(null); 
    } 

    protected override bool TryComputeLength(out long length) 
    { 
     length = -1; 
     return false; 
    } 
}