wmi的Win32_Battery类实现

其中EstimatedChargeRemaining属性返回剩余电量的百分比,EstimatedRunTime属性返回剩余时间(分钟)

其他属性参考http://msdn2.microsoft.com/en-us/library/aa394074.aspx

我写了一个示范代码返回剩余电量的百分比

首先在引用里添加System.Management

核心代码如下:

using System.Management;

....

ObjectQuery oq = new ObjectQuery("select * from Win32_Battery");

            ManagementObjectSearcher mo = new ManagementObjectSearcher(oq);

            ManagementObjectCollection moc = mo.Get();

            foreach (ManagementObject moo in moc)

            {

                MessageBox.Show(moo["EstimatedChargeRemaining搜索"].ToString()+"%");

            }

有时候需要监控到笔记本电池的剩余电量，调查后发现WMI对象可以搞定。

在使用WMI对象前，先要添加对System.Management的引用，然后就可以调用WMI对象。

我们使用的WMI对象是：Win32_Battery

对象参考：http://msdn.microsoft.com/zh-cn/library/aa394074(v=VS.85).aspx

代码：

ManagementClass mc = new ManagementClass("Win32_Battery");

ManagementObjectCollection moc = mc.GetInstances();

ManagementObjectCollection.ManagementObjectEnumerator mom = moc.GetEnumerator();if (mom.MoveNext()) {

   Console.WriteLine("EstimatedChargeRemaining: \t{0}%", mom.Current.Properties["EstimatedChargeRemaining"].Value);}

  class Program

    {

        [DllImport("kernel32", EntryPoint = "GetSystemPowerStatus")]

         private static extern void GetSystemPowerStatus搜索(ref SYSTEM_POWER_STATUS lpSystemPowerStatus);   

         public struct SYSTEM_POWER_STATUS

         {

             public Byte ACLineStatus;                //0 = offline,  1 = Online, 255 = UnKnown Status.

             public Byte BatteryFlag;

            public Byte BatteryLifePercent;

            public Byte Reserved1;

            public int BatteryLifeTime;

             public int BatteryFullLifeTime;

         }   

         static void Main(string[] args)

        {

            SYSTEM_POWER_STATUS SysPower = new SYSTEM_POWER_STATUS();

             string strLifeTime, strLifePercent;   

            GetSystemPowerStatus(ref SysPower);   

             Console.WriteLine("供电状态:" + Convert.ToString(SysPower.ACLineStatus) + "\n"

                              + "剩余时间:" + Convert.ToString(SysPower.BatteryLifeTime) + " seconds. \n"

                              + "电力剩余:" + Convert.ToString(SysPower.BatteryLifePercent) + "% \n");   

             Console.ReadLine();

         }

     }

Win32_Battery class

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The Win32_Battery WMI class represents a battery connected to the computer system.

The following syntax is simplified from Managed Object Format (MOF) code and includes all of the inherited properties. Properties are listed in alphabetic order, not MOF order.

Syntax

Copy

[Provider("CIMWin32")]class Win32_Battery : CIM_Battery

{

  uint16   Availability;

  uint32   BatteryRechargeTime;

  uint16   BatteryStatus;

  string   Caption;

  uint16   Chemistry;

  uint32   ConfigManagerErrorCode;

  boolean  ConfigManagerUserConfig;

  string   CreationClassName;

  string   Description;

  uint32   DesignCapacity;

  uint64   DesignVoltage;

  string   DeviceID;

  boolean  ErrorCleared;

  string   ErrorDescription;

  uint16   EstimatedChargeRemaining;

  uint32   EstimatedRunTime;

  uint32   ExpectedBatteryLife;

  uint32   ExpectedLife;

  uint32   FullChargeCapacity;

  datetime InstallDate;

  uint32   LastErrorCode;

  uint32   MaxRechargeTime;

  string   Name;

  string   PNPDeviceID;

  uint16   PowerManagementCapabilities[];

  boolean  PowerManagementSupported;

  string   SmartBatteryVersion;

  string   Status;

  uint16   StatusInfo;

  string   SystemCreationClassName;

  string   SystemName;

  uint32   TimeOnBattery;

  uint32   TimeToFullCharge;

};

Members

The Win32_Battery class has these types of members:

Methods

The Win32_Battery class has these methods.

Method	Description
Reset	Not implemented. To implement this method, see the Reset method in CIM_Battery for documentation.
SetPowerState	Not implemented. To implement this method, see the SetPowerState method in CIM_Battery for documentation.

Properties

The Win32_Battery class has these properties.

Availability

Data type: uint16
Access type: Read-only

Availability and status of the device. Inherited from CIM_LogicalDevice.

Value	Meaning
1 (0x1)	Other
2 (0x2)	Unknown
3 (0x3)	Running or Full Power
4 (0x4)	Warning
5 (0x5)	In Test
6 (0x6)	Not Applicable
7 (0x7)	Power Off
8 (0x8)	Off Line
9 (0x9)	Off Duty
10 (0xA)	Degraded
11 (0xB)	Not Installed
12 (0xC)	Install Error
13 (0xD)	Power Save - Unknown The device is known to be in a power save mode, but its exact status is unknown.
14 (0xE)	Power Save - Low Power Mode The device is in a power save state but still functioning, and may exhibit degraded performance.
15 (0xF)	Power Save - Standby The device is not functioning, but could be brought to full power quickly.
16 (0x10)	Power Cycle
17 (0x11)	Power Save - Warning The device is in a warning state, though also in a power save mode.

BatteryRechargeTime

Data type: uint32
Access type: Read-only
Qualifiers: Deprecated, Units (Minutes)

Time required to fully charge the battery. This property is not supported. BatteryRechargeTime does not have a replacement property, and is now considered obsolete.

BatteryStatus

Data type: uint16
Access type: Read-only

Status of the battery. The value 10 (Undefined) is not valid in the CIM schema because in DMI it represents that no battery is installed. In this case, the object should not be instantiated. This property is inherited from CIM_Battery.

Value	Meaning
1	The battery is discharging.
2	The system has access to AC so no battery is being discharged. However, the battery is not necessarily charging.
3	Fully Charged
4	Low
5	Critical
6	Charging
7	Charging and High
8	Charging and Low
9	Charging and Critical
10	Undefined
11	Partially Charged

Caption

Data type: string
Access type: Read-only

Short description of the object—a one-line string. This property is inherited from CIM_ManagedSystemElement.

Chemistry

Data type: uint16
Access type: Read-only

Enumeration that describes the battery's chemistry. This property is inherited from CIM_Battery.

Value	Meaning
1	Other
2	Unknown
3	Lead Acid
4	Nickel Cadmium
5	Nickel Metal Hydride
6	Lithium-ion
7	Zinc air
8	Lithium Polymer

ConfigManagerErrorCode

Data type: uint32
Access type: Read-only

Windows Configuration Manager error code.

Value	Meaning
0 (0x0)	Device is working properly.
1 (0x1)	Device is not configured correctly.
2 (0x2)	Windows cannot load the driver for this device.
3 (0x3)	Driver for this device might be corrupted, or the system may be low on memory or other resources.
4 (0x4)	Device is not working properly. One of its drivers or the registry might be corrupted.
5 (0x5)	Driver for the device requires a resource that Windows cannot manage.
6 (0x6)	Boot configuration for the device conflicts with other devices.
7 (0x7)	Cannot filter.
8 (0x8)	Driver loader for the device is missing.
9 (0x9)	Device is not working properly. The controlling firmware is incorrectly reporting the resources for the device.
10 (0xA)	Device cannot start.
11 (0xB)	Device failed.
12 (0xC)	Device cannot find enough free resources to use.
13 (0xD)	Windows cannot verify the device's resources.
14 (0xE)	Device cannot work properly until the computer is restarted.
15 (0xF)	Device is not working properly due to a possible re-enumeration problem.
16 (0x10)	Windows cannot identify all of the resources that the device uses.
17 (0x11)	Device is requesting an unknown resource type.
18 (0x12)	Device drivers must be reinstalled.
19 (0x13)	Failure using the VxD loader.
20 (0x14)	Registry might be corrupted.
21 (0x15)	System failure. If changing the device driver is ineffective, see the hardware documentation. Windows is removing the device.
22 (0x16)	Device is disabled.
23 (0x17)	System failure. If changing the device driver is ineffective, see the hardware documentation.
24 (0x18)	Device is not present, not working properly, or does not have all of its drivers installed.
25 (0x19)	Windows is still setting up the device.
26 (0x1A)	Windows is still setting up the device.
27 (0x1B)	Device does not have valid log configuration.
28 (0x1C)	Device drivers are not installed.
29 (0x1D)	Device is disabled. The device firmware did not provide the required resources.
30 (0x1E)	Device is using an IRQ resource that another device is using.
31 (0x1F)	Device is not working properly. Windows cannot load the required device drivers.

ConfigManagerUserConfig

Data type: boolean
Access type: Read-only

If True, the device is using a user-defined configuration. This property is inherited from CIM_LogicalDevice.

CreationClassName

Data type: string
Access type: Read-only
Qualifiers: Key, MaxLen (256)

Name of the first concrete class that appears in the inheritance chain used in the creation of an instance. When used with the other key properties of the class, the property allows all instances of this class and its subclasses to be identified uniquely. This property is inherited from CIM_LogicalDevice.

Description

Data type: string
Access type: Read-only

Description of the object. This property is inherited from CIM_ManagedSystemElement.

DesignCapacity

Data type: uint32
Access type: Read-only

Design capacity of the battery in milliwatt-hours. If the property is not supported, enter 0 (zero). This property is inherited from CIM_Battery.

DesignVoltage

Data type: uint64
Access type: Read-only

Design voltage of the battery in millivolts. If the attribute is not supported, enter 0 (zero). This property is inherited from CIM_Battery.

For more information about using uint64 values in scripts, see Scripting in WMI.

DeviceID

Data type: string
Access type: Read-only
Qualifiers: Key

Identifies the battery. This property is inherited from CIM_LogicalDevice.

Example: "Internal Battery"

ErrorCleared

Data type: boolean
Access type: Read-only

If True, the error reported in the LastErrorCode property is now cleared. This property is inherited from CIM_LogicalDevice.

ErrorDescription

Data type: string
Access type: Read-only

Free-form string that supplies more information about the error recorded in LastErrorCode property, and information about any corrective actions that may be taken. This property is inherited from CIM_LogicalDevice.

EstimatedChargeRemaining

Data type: uint16
Access type: Read-only

Estimate of the percentage of full charge remaining. This property is inherited from CIM_Battery.

EstimatedRunTime

Data type: uint32
Access type: Read-only

Estimate in minutes of the time to battery charge depletion under the present load conditions if the utility power is off, or lost and remains off, or a laptop is disconnected from a power source. This property is inherited from CIM_Battery.

ExpectedBatteryLife

Data type: uint32
Access type: Read-only
Qualifiers: Deprecated, Units (Minutes)

Amount of time it takes to completely drain the battery after it is fully charged. This property is no longer used and is considered obsolete.

ExpectedLife

Data type: uint32
Access type: Read-only

Battery's expected lifetime in minutes, assuming that the battery is fully charged. The property represents the total expected life of the battery, not its current remaining life, which is indicated by the EstimatedRunTime property. This property is inherited from CIM_Battery.

FullChargeCapacity

Data type: uint32
Access type: Read-only

Full charge capacity of the battery in milliwatt-hours. Comparison of the value to the DesignCapacity property determines when the battery requires replacement. A battery's end of life is typically when the FullChargeCapacity property falls below 80% of the DesignCapacity property. If the property is not supported, enter 0 (zero). This property is inherited from CIM_Battery.

InstallDate

Data type: datetime
Access type: Read-only

Date and time the object was installed. This property does not need a value to indicate that the object is installed. This property is inherited from CIM_ManagedSystemElement.

LastErrorCode

Data type: uint32
Access type: Read-only

Last error code reported by the logical device. This property is inherited from CIM_LogicalDevice.

MaxRechargeTime

Data type: uint32
Access type: Read-only

Maximum time, in minutes, to fully charge the battery. The property represents the time to recharge a fully depleted battery, not the current remaining charge time, which is indicated in the TimeToFullCharge property. This property is inherited from CIM_Battery.

Name

Data type: string
Access type: Read-only

Defines the label by which the object is known. When subclassed, the property can be overridden to be a key property. This property is inherited from CIM_ManagedSystemElement.

PNPDeviceID

Data type: string
Access type: Read-only

Windows Plug and Play device identifier of the logical device. This property is inherited from CIM_LogicalDevice.

Example: "*PNP030b"

PowerManagementCapabilities

Data type: uint16 array
Access type: Read-only

Array of the specific power-related capabilities of a logical device. This property is inherited from CIM_LogicalDevice.

Value	Meaning
0 (0x0)	Unknown
1 (0x1)	Not Supported
2 (0x2)	Disabled
3 (0x3)	Enabled The power management features are currently enabled but the exact feature set is unknown or the information is unavailable.
4 (0x4)	Power Saving Modes Entered Automatically The device can change its power state based on usage or other criteria.
5 (0x5)	Power State Settable The SetPowerState method is supported. This method is found on the parent CIM_LogicalDevice class and can be implemented. For more information, see Designing Managed Object Format (MOF) Classes.
6 (0x6)	Power Cycling Supported The SetPowerState method can be invoked with the PowerState parameter set to 5 (Power Cycle).
7 (0x7)	Timed Power-On Supported The SetPowerState method can be invoked with the PowerState parameter set to 5 (Power Cycle) and Time set to a specific date and time, or interval, for power-on.

PowerManagementSupported

Data type: boolean
Access type: Read-only

If True, the device can be power-managed (can be put into suspend mode, and so on). The property does not indicate that power management features are currently enabled, only that the logical device is capable of power management. This property is inherited from CIM_LogicalDevice.

SmartBatteryVersion

Data type: string
Access type: Read-only

Data Specification version number supported by the battery. If the battery does not support this function, the value should be left blank. This property is inherited from CIM_Battery.

Status

Data type: string
Access type: Read-only

Current status of the object. Various operational and nonoperational statuses can be defined. Operational statuses include: "OK", "Degraded", and "Pred Fail" (an element, such as a SMART-enabled hard disk drive, may be functioning properly but predicting a failure in the near future). Nonoperational statuses include: "Error", "Starting", "Stopping", and "Service". The latter, "Service", could apply during mirror-resilvering of a disk, reload of a user permissions list, or other administrative work. Not all such work is online, yet the managed element is neither "OK" nor in one of the other states. This property is inherited from CIM_ManagedSystemElement.

The values are:

"OK"

"Error"

"Degraded"

"Unknown"

"Starting"

"Stopping"

"Service"

"Stressed"

"NonRecover"

"No Contact"

"Lost Comm"

StatusInfo

Data type: uint16
Access type: Read-only

State of the logical device. If this property does not apply to the logical device, the value 5 (Not Applicable) should be used. This property is inherited from CIM_LogicalDevice.

Value	Meaning
1 (0x1)	Other
2 (0x2)	Unknown
3 (0x3)	Enabled
4 (0x4)	Disabled
5 (0x5)	Not Applicable

SystemCreationClassName

Data type: string
Access type: Read-only

Value of the scoping computer's CreationClassName property. This property is inherited from CIM_LogicalDevice.

SystemName

Data type: string
Access type: Read-only

Name of the scoping system. This property is inherited from CIM_LogicalDevice.

TimeOnBattery

Data type: uint32
Access type: Read-only

Elapsed time in seconds since the computer system's UPS last switched to battery power, or the time since the system or UPS was last restarted, whichever is less. If the battery is "on line", 0 (zero) is returned. This property is inherited from CIM_Battery.

TimeToFullCharge

Data type: uint32
Access type: Read-only

Remaining time to charge the battery fully in minutes at the current charging rate and usage. This property is inherited from CIM_Battery.

Remarks

The Win32_Battery class is derived from CIM_Battery which derives from CIM_LogicalDevice.

Examples

For script code examples, see WMI Tasks for Scripts and Applications and the TechNet ScriptCenter Script Repository.

For C++ code examples, see WMI C++ Application Examples.

Requirements

Minimum supported client	Windows XP
Minimum supported server	Windows Server 2003
Namespace	\root\CIMV2
MOF	CIMWin32.mof
DLL	CIMWin32.dll