Question

有没有办法在asp.net页面上显示CPU和RAM使用情况统计信息。我已经尝试了this代码，但我有错误：

Access to the registry key 'Global' is denied.

在这一行：

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

Answer 1

如评论中所述，如果没有相应的权限，您将无法执行此操作。资源统计信息将包含大量有关系统其他用户拥有的进程的信息，这些信息是特权信息

Answer 2

使用：

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

    float f = cpuUsage.NextValue();

编辑：

Windows将性能计数器的访问权限限制为管理员或性能日志用户（在Vista +中）组中的访问权限。设置注册表安全性无法解决此问题。有可能在某处附加了用户权限。

Answer 3

不要调用.NextValue（）两次你可以使用MVC“全局变量：

    [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;

        }

    }
}

public class JsonContent：HttpContent { 私人只读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;
    }
}

Answer 4

使用：

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

而不是：

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

如何在asp.net中获取CPU使用率

4 个答案: