In this article I will
show you how to show battery status of laptop battery like its battery is discharging,
charging, full etc. We will do this using WMI because WMI have power to answer
questions about battery status .So let's start with WMI.
To access account information of Battery we need
to Use System. Management name space.
To use this name space first of all we need to add
reference to System.management by
Project Menu>>Add Reference.
after that at the top of the code use
using System.Management;
so that you can use of
its classes . Now its simple to get information about laptop Battery through querying ManagementObjectSearcher Class .
We can get all information about Laptop Battery through
Win32_Battery class.
so we need to query on that class to get related
Management object and then we just need to get various properties related to it
.
setup interface like below on the form
![1.gif]()
here i have taken two labels one textbox with read only property and one progress bar and a timer control .
now to get battery status we need to code like below .
Dictionary<UInt16, string>
StatusCodes;
private void
Form1_Load(object sender, EventArgs e)
{
StatusCodes = new Dictionary<ushort,
string>();
StatusCodes.Add(1, "The battery is
discharging");
StatusCodes.Add(2, "The system has
access to AC so no battery is being discharged. However, the battery is not
necessarily charging");
StatusCodes.Add(3, "Fully Charged");
StatusCodes.Add(4, "Low");
StatusCodes.Add(5, "Critical");
StatusCodes.Add(6, "Charging");
StatusCodes.Add(7, "Charging and
High");
StatusCodes.Add(8, "Charging and
Low");
StatusCodes.Add(9, "Undefined");
StatusCodes.Add(10,"Partially
Charged");
/* Set progress bar values and Properties */
progressBar1.Maximum = 100;
progressBar1.Style = ProgressBarStyle.Continuous;
timer1.Enabled = true;
ManagementObjectSearcher mos = new ManagementObjectSearcher("select * from Win32_Battery");
foreach (ManagementObject
mo in mos.Get())
{
lblBatteryName.Text = mo["Name"].ToString();
UInt16
statuscode = (UInt16)mo["BatteryStatus"];
string
statusString = StatusCodes[statuscode];
lblBatteryStatus.Text =
statusString;
}
}
private void
timer1_Tick(object sender, EventArgs e)
{
ManagementObjectSearcher mos = new ManagementObjectSearcher("select * from Win32_Battery where Name='"+lblBatteryName.Text+"'");
foreach
(ManagementObject mo in mos.Get())
{
UInt16
statuscode = (UInt16)mo["BatteryStatus"];
string
statusString = StatusCodes[statuscode];
lblBatteryStatus.Text =
statusString;
/*
Set Progress bar according to status */
if
(statuscode == 4)
{
progressBar1.ForeColor = Color.Red;
progressBar1.Value = 5;
}
else
if (statuscode == 3)
{
progressBar1.ForeColor = Color.Blue;
progressBar1.Value = 100;
}
else
if (statuscode == 2)
{
progressBar1.ForeColor = Color.Green;
progressBar1.Value = 100;
}
else
if (statuscode == 5)
{
progressBar1.ForeColor = Color.Red;
progressBar1.Value = 1;
}
else
if (statuscode == 6)
{
progressBar1.ForeColor = Color.Blue;
progressBar1.Value = 100;
}
}
}
Here i have used few status only to show in progress bar you can code whatever you want to show in progress bar..
Thank you :)