WMI介绍及简单实际运用（二，Win32_Processor内容）

下面是获取计算机的CPU利用率信息：

ConnectionOptions Conn = new ConnectionOptions();

Conn.EnablePrivileges = true;

//如果是登陆其他电脑就需要提供用户名和密码

//Conn.Username = "administrator";

//Conn.Password = "";

System.Management.ManagementScope Ms = new System.Management.ManagementScope("\\\\localhost\\root\\cimv2", Conn);     

System.Management.ObjectQuery Query = new System.Management.ObjectQuery("select *  from Win32_Processor ");

ManagementObjectSearcher Searcher = new ManagementObjectSearcher(Ms,Query);

WMI是支持以SQL语句的方式来查询，对于有SQL语句操作经验的开发人员来说基本上不用学习；只是根据需要的情况查询相关的WMI Classe就可以了。如果需要条件过虑的情况下直接套用where，对于WMI Class的相关成员可以从MSDN得到相关详细的资料。

Win32_Processor成员描述：

class Win32_Processor : CIM_Processor

{

 uint16 AddressWidth;

 uint16 Architecture;

 uint16 Availability;

 string Caption;

 uint32 ConfigManagerErrorCode;

 boolean ConfigManagerUserConfig;

 uint16 CpuStatus;

 string CreationClassName;

 uint32 CurrentClockSpeed;

 uint16 CurrentVoltage;

 uint16 DataWidth;

 string Description;

 string DeviceID;

 boolean ErrorCleared;

 string ErrorDescription;

 uint32 ExtClock;

 uint16 Family;

 datetime InstallDate;

 uint32 L2CacheSize;

 uint32 L2CacheSpeed;

 uint32 L3CacheSize;

 uint32 L3CacheSpeed;

 uint32 LastErrorCode;

 uint16 Level;

 uint16 LoadPercentage;

 string Manufacturer;

 uint32 MaxClockSpeed;

 string Name;

 uint32 NumberOfCores;

 uint32 NumberOfLogicalProcessors;

 string OtherFamilyDescription;

 string PNPDeviceID;

 uint16 PowerManagementCapabilities[];

 boolean PowerManagementSupported;

 string ProcessorId;

 uint16 ProcessorType;

 uint16 Revision;

 string Role;

 string SocketDesignation;

 string Status;

 uint16 StatusInfo;

 string Stepping;

 string SystemCreationClassName;

 string SystemName;

 string UniqueId;

 uint16 UpgradeMethod;

 string Version;

 uint32 VoltageCaps;

};

可以通过LoadPercentage成员获取CPU的利用率。

ManagementObjectCollection ReturnCollection = Searcher.Get();

foreach(ManagementObject item in ReturnCollection)

{

     Console.WriteLine(item["LoadPercentage"]);

}

查询会返回一个对象集，因为实际情况可能有多个CPU；因此通过遍历的方式来把具体CPU的信息显示出来。