Application Lifetime in Visual Studio .NET

Draw QR Code in Visual Studio .NET Application Lifetime
Application Lifetime
Generate QR In Visual Studio .NET
Using Barcode printer for VS .NET Control to generate, create Denso QR Bar Code image in VS .NET applications.
A WinForms application starts when the Main method is called However, to initialize a WinForms applicati fully and start it routing WinForms events, you need a call to ApplicationRun There are three ways to call the Application class's Run method The first is to simply call Run with no arguments at all This is useful only if other means have already been used to show an initial UI:
QR Decoder In .NET
Using Barcode scanner for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
[STAThreadAttribute] static void Main() { // Create and show the main form modelessly Form form = new MainForm(); formShow(); // Run the application ApplicationRun(); }
Bar Code Encoder In Visual Studio .NET
Using Barcode generation for .NET framework Control to generate, create barcode image in .NET applications.
When you call Run with no arguments, the application runs until explicitly told to stop, even when all its fo are closed This puts the burden on some part of the application to call the Application class's Exit method void MainForm_Closed(object sender, EventArgs e) { // Close the application when the main form goes away // Only for use when ApplicationRun is called without // any arguments ApplicationExit(); }
Scanning Bar Code In .NET Framework
Using Barcode decoder for .NET framework Control to read, scan read, scan image in .NET framework applications.
Typically, you call ApplicationRun without any arguments only when the application needs a secondary UI thread A UI thread is one that calls ApplicationRun and can process the events that drive a Windows application Because the vast majority of applications contain a single UI thread and because most of thos have a main form that, when closed, causes the application to exit, another overload of the Run method i used far more often This overload of Run takes as an argument a reference to the form designated as the main form When Run is called this way, it shows the main form and doesn't return until the main form closes: [STAThreadAttribute] static void Main() { // Create the main form Form form = new MainForm(); // Run the application until the main form is closed ApplicationRun(form); }
Drawing QR-Code In C#.NET
Using Barcode encoder for .NET framework Control to generate, create QR-Code image in Visual Studio .NET applications.
In this case, there is no need for explicit code to exit the application Instead, the Application watches for main form to close and then exits itself
QR-Code Creation In VS .NET
Using Barcode creator for ASP.NET Control to generate, create QR Code 2d barcode image in ASP.NET applications.
Application Context
Encoding QR Code 2d Barcode In VB.NET
Using Barcode generation for .NET framework Control to generate, create Denso QR Bar Code image in .NET framework applications.
Internally, the Run method creates an instance of the ApplicationContext class from the SystemWindowsForms namespace It's this class that subscribes to the main form's Closed event and ex the application as appropriate: class ApplicationContext { // Constructors public ApplicationContext(); public ApplicationContext(Form mainForm); // Properties public Form MainForm { get; set; } // Events public event EventHandler ThreadExit;
Print Barcode In VS .NET
Using Barcode generator for .NET Control to generate, create barcode image in VS .NET applications.
// Methods public void ExitThread(); protected virtual void OnMainFormClosed(object sender, EventArgs e); } In fact, the Run method allows you to pass an ApplicationContext yourself: [STAThreadAttribute] static void Main() { // Run the application with a context ApplicationContext ctx = new ApplicationContext(new MainForm()); ApplicationRun(ctx); }
USS Code 128 Generator In Visual Studio .NET
Using Barcode creator for .NET framework Control to generate, create Code128 image in .NET applications.
This is useful if you'd like to derive from the ApplicationContext class and provide your own custom conte class MyTimedContext : ApplicationContext { Timer timer = new Timer(); public MyTimedContext(Form form) : base(form) { timerTick += new EventHandler(TimesUp); timerInterval = 5000; // 5 minutes timerEnabled = true; } void TimesUp(object sender, EventArgs e) { timerEnabled = false; timerDispose(); DialogResult res = MessageBoxShow( "OK to charge your credit card ", "Time's Up!", MessageBoxButtonsYesNo); if( res == DialogResultNo ) { // See ya baseMainFormClose(); } } } [STAThreadAttribute] static void Main() { // Run the application with a custom context ApplicationContext ctx = new MyTimedContext(new MainForm()); ApplicationRun(ctx); }
Create GTIN - 13 In VS .NET
Using Barcode maker for VS .NET Control to generate, create GTIN - 13 image in Visual Studio .NET applications.
This custom context class waits for five minutes after an application has started and then asks to charge t user's credit card If the answer is no, the main form of the application will be closed (available from the MainForm property of the base ApplicationContext class), causing the application to exit
Barcode Creator In .NET Framework
Using Barcode maker for VS .NET Control to generate, create bar code image in Visual Studio .NET applications.
Conversely, if you'd like to stop the application from exiting when the main form goes away, you can over the OnMainFormClosed method from the ApplicationContext base class: class RemotingServerContext : ApplicationContext { public RemotingServerContext(Form form) : base(form) { }
EAN8 Drawer In Visual Studio .NET
Using Barcode generator for Visual Studio .NET Control to generate, create European Article Number 8 image in VS .NET applications.
protected override void OnMainFormClosed(object sender, EventArgs e) { // Don't let base class exit application // NOTE: Remember to call ApplicationExit // later when the remoting service // is finished servicing its clients if( ServicingRemotingClient() ) return; // Let base class exit application baseOnMainFormClosed(sender, e); } protected bool ServicingRemotingClient() {} } }
EAN / UCC - 13 Printer In Java
Using Barcode generation for Java Control to generate, create USS-128 image in Java applications.
This example assumes an application that is serving NET Remoting[1] clients and so needs to stick aroun even if the user has closed the main form
Encoding EAN / UCC - 14 In .NET Framework
Using Barcode creation for ASP.NET Control to generate, create UCC.EAN - 128 image in ASP.NET applications.
NET Remoting is a technology that allows objects to talk to each other across application and machine boundaries Remoting is beyond the scope of this book but is covered very nicely in Ingo Rammer's book Advanced NET Remoting (APress 2002)
Printing Bar Code In Visual Basic .NET
Using Barcode creation for Visual Studio .NET Control to generate, create bar code image in Visual Studio .NET applications.
USS Code 128 Generator In Java
Using Barcode generation for Java Control to generate, create Code 128A image in Java applications.
USS Code 128 Creation In Visual Basic .NET
Using Barcode creator for Visual Studio .NET Control to generate, create Code-128 image in .NET framework applications.
Drawing ECC200 In Visual C#
Using Barcode generation for Visual Studio .NET Control to generate, create Data Matrix ECC200 image in .NET applications.