PowerStatus Class
Indicates current system power status information.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
The PowerStatus type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | BatteryChargeStatus | Gets the current battery charge status. |
![]() | BatteryFullLifetime | Gets the reported full charge lifetime of the primary battery power source in seconds. |
![]() | BatteryLifePercent | Gets the approximate amount of full battery charge remaining. |
![]() | BatteryLifeRemaining | Gets the approximate number of seconds of battery time remaining. |
![]() | PowerLineStatus | Gets the current system power status. |
| Name | Description | |
|---|---|---|
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | ToString | 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.Windows.Forms.dll> #using <System.Drawing.dll> #using <System.dll> using namespace System; using namespace System::Collections; using namespace System::ComponentModel; using namespace System::Drawing; using namespace System::Reflection; using namespace System::Windows::Forms; public ref class PowerStatusBrowserForm: public System::Windows::Forms::Form { private: System::Windows::Forms::ListBox^ listBox1; System::Windows::Forms::TextBox^ textBox1; public: PowerStatusBrowserForm() { this->SuspendLayout(); InitForm(); //Add each property of the PowerStatus class to the list box. Type^ t = System::Windows::Forms::PowerStatus::typeid; array<PropertyInfo^>^pi = t->GetProperties(); for ( int i = 0; i < pi->Length; i++ ) listBox1->Items->Add( pi[ i ]->Name ); textBox1->Text = String::Format( "The PowerStatus class has {0} properties.\r\n", pi->Length ); // Configure the list item selected handler for the list box to invoke a // method that displays the value of each property. listBox1->SelectedIndexChanged += gcnew EventHandler( this, &PowerStatusBrowserForm::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 = System::Windows::Forms::PowerStatus::typeid; array<PropertyInfo^>^pi = t->GetProperties(); PropertyInfo^ prop = nullptr; for ( int i = 0; i < pi->Length; i++ ) if ( pi[ i ]->Name == propname ) { prop = pi[ i ]; break; } Object^ propval = prop->GetValue( SystemInformation::PowerStatus, nullptr ); textBox1->Text = String::Format( "{0}\r\nThe value of the {1} property is: {2}", textBox1->Text, propname, propval ); } void InitForm() { // Initialize the form settings this->listBox1 = gcnew System::Windows::Forms::ListBox; this->textBox1 = gcnew 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 = System::Drawing::Point( 8, 16 ); this->listBox1->Size = 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 = System::Drawing::Point( 188, 16 ); this->textBox1->Multiline = true; this->textBox1->ScrollBars = System::Windows::Forms::ScrollBars::Vertical; this->textBox1->Size = System::Drawing::Size( 420, 496 ); this->textBox1->TabIndex = 1; this->ClientSize = 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] int main() { Application::Run( gcnew PowerStatusBrowserForm ); }
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
