PowerStatus Class
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PowerStatus Class

 

Indicates current system power status information.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

System.Object
  System.Windows.Forms.PowerStatus

public class PowerStatus

NameDescription
System_CAPS_pubpropertyBatteryChargeStatus

Gets the current battery charge status.

System_CAPS_pubpropertyBatteryFullLifetime

Gets the reported full charge lifetime of the primary battery power source in seconds.

System_CAPS_pubpropertyBatteryLifePercent

Gets the approximate amount of full battery charge remaining.

System_CAPS_pubpropertyBatteryLifeRemaining

Gets the approximate number of seconds of battery time remaining.

System_CAPS_pubpropertyPowerLineStatus

Gets the current system power status.

NameDescription
System_CAPS_pubmethodEquals(Object)

Determines whether the specified object is equal to the current object.(Inherited from Object.)

System_CAPS_protmethodFinalize()

Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection.(Inherited from Object.)

System_CAPS_pubmethodGetHashCode()

Serves as the default hash function. (Inherited from Object.)

System_CAPS_pubmethodGetType()

Gets the Type of the current instance.(Inherited from Object.)

System_CAPS_protmethodMemberwiseClone()

Creates a shallow copy of the current Object.(Inherited from Object.)

System_CAPS_pubmethodToString()

Returns a string that represents the current object.(Inherited from Object.)

The PowerStatus class represents information about the current AC line power status, battery charging status, and battery charge status.

This class is used by the PowerStatus property of the SystemInformation class to indicate current system power information.

The following example lists all properties of the PowerStatus class in a ListBox control and displays the current value of the associated property in a TextBox control when a list item selected.

using System;
using System.Collections;
using System.ComponentModel;
using System.Drawing;
using System.Reflection;
using System.Windows.Forms;

namespace PowerStatusBrowser
{
    public class PowerStatusBrowserForm : System.Windows.Forms.Form
    {
        private System.Windows.Forms.ListBox listBox1;
        private System.Windows.Forms.TextBox textBox1;        

        public PowerStatusBrowserForm()
        {
            this.SuspendLayout();
            InitForm();

            //Add each property of the PowerStatus class to the list box.
            Type t = typeof(System.Windows.Forms.PowerStatus);            
            PropertyInfo[] pi = t.GetProperties();            
            for( int i=0; i<pi.Length; i++ )
                listBox1.Items.Add( pi[i].Name );            
            textBox1.Text = "The PowerStatus class has "+pi.Length.ToString()+" properties.\r\n";

            // Configure the list item selected handler for the list box to invoke a 
            // method that displays the value of each property.           
            listBox1.SelectedIndexChanged += new EventHandler(listBox1_SelectedIndexChanged);
            this.ResumeLayout(false);
        }

        private void listBox1_SelectedIndexChanged(object sender, EventArgs e)
        {
            // Return if no item is selected.
            if( listBox1.SelectedIndex == -1 ) return;
            // Get the property name from the list item
            string propname = listBox1.Text;

            // Display the value of the selected property of the PowerStatus type.
            Type t = typeof(System.Windows.Forms.PowerStatus);
            PropertyInfo[] pi = t.GetProperties();            
            PropertyInfo prop = null;
            for( int i=0; i<pi.Length; i++ )
                if( pi[i].Name == propname )
                {
                    prop = pi[i];
                    break;           
                }

            object propval = prop.GetValue(SystemInformation.PowerStatus, null);            
            textBox1.Text += "\r\nThe value of the "+propname+" property is: "+propval.ToString();
        }

        private void InitForm()
        {
            // Initialize the form settings
            this.listBox1 = new System.Windows.Forms.ListBox();
            this.textBox1 = new System.Windows.Forms.TextBox();            
            this.listBox1.Anchor = ((System.Windows.Forms.AnchorStyles)((((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
                | System.Windows.Forms.AnchorStyles.Left) | System.Windows.Forms.AnchorStyles.Right)));
            this.listBox1.Location = new System.Drawing.Point(8, 16);
            this.listBox1.Size = new System.Drawing.Size(172, 496);
            this.listBox1.TabIndex = 0;            
            this.textBox1.Anchor = ((System.Windows.Forms.AnchorStyles)(((System.Windows.Forms.AnchorStyles.Top | System.Windows.Forms.AnchorStyles.Bottom) 
                | System.Windows.Forms.AnchorStyles.Right)));
            this.textBox1.Location = new System.Drawing.Point(188, 16);
            this.textBox1.Multiline = true;
            this.textBox1.ScrollBars = System.Windows.Forms.ScrollBars.Vertical;           
            this.textBox1.Size = new System.Drawing.Size(420, 496);
            this.textBox1.TabIndex = 1;            
            this.ClientSize = new System.Drawing.Size(616, 525);            
            this.Controls.Add(this.textBox1);
            this.Controls.Add(this.listBox1);            
            this.Text = "Select a PowerStatus property to get the value of";                   
        }

        [STAThread]
        static void Main() 
        {
            Application.Run(new PowerStatusBrowserForm());
        }
    }
}

.NET Framework
Available since 2.0

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

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