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我正在研究一个应该包括计算机粉丝状态的项目。我需要的大部分属性都可以从Win32_Fan类中获得。遗憾的是,我找不到使用此类获取当前风扇速度读数的方法。在Win32_Fan MSDN 页面中,“DesiredSpeed”属性中提到当前速度由名为的传感器确定CIM_Tachometer

期望速度

数据类型:uint64

访问类型:只读

限定词:单位(“每分钟转数”)

当前请求的风扇速度,以每分钟转数定义,当支持变速风扇时(VariableSpeed 为 TRUE)。当前速度由使用CIM_AssociatedSensor关系与风扇关联的传感器 ( CIM_Tachometer ) 确定。

此属性继承自 CIM_Fan。

有关在脚本中使用 uint64 值的更多信息,请参阅 WMI 中的脚本。

看到之后,我搜索了这个 Tachometer CIM 传感器并找到了以下代码片段(取自http://wutils.com/wmi/root/cimv2/cim_tachometer/cs-samples.html):

//Project -> Add reference -> System.Management
//using System.Management;

//set the class name and namespace
string NamespacePath = "\\\\.\\ROOT\\cimv2";
string ClassName = "CIM_Tachometer";

//Create ManagementClass
ManagementClass oClass = new ManagementClass(NamespacePath + ":" + ClassName);

//Get all instances of the class and enumerate them
foreach (ManagementObject oObject in oClass.GetInstances())
{
    //access a property of the Management object
    Console.WriteLine("Accuracy : {0}", oObject["Accuracy"]);
}

所以我尝试在我的代码中实现它:

public static String[] GetFanInfo()
    {
        ManagementClass cSpeed = new ManagementClass
            ("\\\\.\\ROOT\\cimv2:CIM_Tachometer");   //Create ManagementClass for the current speed property
        ManagementObjectSearcher temp = new ManagementObjectSearcher("root\\WMI",
            "SELECT * FROM MSAcpi_ThermalZoneTemperature"); //Create management object searcher for the temperature property
        ManagementObjectSearcher mos = new ManagementObjectSearcher
            ("SELECT * FROM Win32_Fan"); //Create a management object searcher for the other properties
        string[] Id = new string[8]; //Preparig  a string array in which the results will be returned
        Id[0] = "Fan"; //First value is the category name
        foreach (ManagementObject mo in mos.Get())
        {

            Id[1] = mo["Name"].ToString(); //Name of the component
            Id[2] = mo["Status"].ToString(); //Component's status
            long vel = Convert.ToInt64(mo["DesiredSpeed"]); //Desired speed of the component
            Id[4] = Convert.ToString(vel); 
            bool s = Convert.ToBoolean(mo["variableSpeed"]); //Wheater or not variable speed are supported
            Id[5] = s.ToString();
            break;
        }
        foreach (ManagementObject obj in temp.Get())
        {
            Double temperature = Convert.ToDouble(obj["CurrentTemperature"].ToString()); //Fetching the temperature
            Id[3] = Convert.ToString((temperature - 2732) / 10.0) + " C";
        }
        foreach (ManagementObject sObject in cSpeed.GetInstances()) //Get all instances of the class and enumerate them
        {
            Id[7] = sObject["CurrentReading"].ToString(); //Getting the current reading
        }
        return Id;
    }

令我惊讶的是,当前阅读的整个部分似乎在运行时被跳过了。无论如何都会发生!

我的问题是,为什么这一部分被跳过了?转速表是不能使用的传感器吗?它是否由于某种原因被禁用?

提前谢谢。

附言

我正在 Microsoft Visual Studio 2015 中使用 winforms 作为用户界面编写程序。

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