📅  最后修改于: 2023-12-03 15:13:52.596000             🧑  作者: Mango
在开发需要使用电池状态信息的应用程序时,获取电池电量是至关重要的一部分。在C#中,可以使用电源管理器来获取电池电量并执行其他电池操作。本文将介绍如何在C#中获取电池电量。
要获取电池电量,需要使用System.Management
和System.Linq
命名空间。首先,我们需要获取Windows电源管理器对象:
using System.Management;
public class Battery
{
public static int GetBatteryLevel()
{
ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_Battery");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
ManagementObjectCollection collection = searcher.Get();
var batteryLevel = collection.Cast<ManagementBaseObject>().First()["EstimatedChargeRemaining"];
return Convert.ToInt32(batteryLevel);
}
}
通过这个函数,我们可以得到表示当前电池电量百分比的整数。注意,该值是估计值。
获取电池电量之外,我们还可以执行其他电池操作:
ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_Battery");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
ManagementObjectCollection collection = searcher.Get();
var batteryStatus = collection.Cast<ManagementBaseObject>().First()["BatteryStatus"];
string status = Convert.ToInt32(batteryStatus) == 1 ? "正在使用电池电源" : "正在使用交流电源";
ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_Battery");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
ManagementObjectCollection collection = searcher.Get();
var batteryCapacity = collection.Cast<ManagementBaseObject>().First()["DesignCapacity"];
var batteryRemaining = collection.Cast<ManagementBaseObject>().First()["EstimateRemainingTime"];
string planName = "平衡";
ObjectQuery query = new ObjectQuery("SELECT * FROM Win32_PowerPlan WHERE IsActive='true'");
ManagementObjectSearcher searcher = new ManagementObjectSearcher(query);
ManagementObjectCollection collection = searcher.Get();
foreach (ManagementObject obj in collection)
{
if (obj["ElementName"].ToString() == planName)
{
obj.InvokeMethod("Activate", null);
break;
}
}
在C#中,我们可以使用电源管理器轻松获取电池电量并执行其他电池操作。上述代码仅仅是基本示例,希望各位程序员可以根据自己的需求进行更多的电池操作。