How Can I Ensure My Splash Screen Waits for a Background Thread Before Closing in .NET?

.NET Splash Screen Synchronization: A Robust Solution

Many .NET developers encounter a common problem: the splash screen closes prematurely before background tasks complete. This article presents a superior method using the WindowsFormsApplicationBase class for reliable splash screen management.

This approach offers a cleaner, more integrated solution compared to manual thread synchronization.

Project Setup:

1. Create a new Windows Forms Application project in Visual Studio.
2. Add a reference to Microsoft.VisualBasic.

Splash Form (frmSplash.cs):

Design a simple form (frmSplash) to serve as your splash screen. No code is needed within this form itself.

Program.cs:

Modify the Main method in Program.cs as follows:

using Microsoft.VisualBasic.ApplicationServices;

[STAThread]
static void Main(string[] args)
{
    Application.EnableVisualStyles();
    Application.SetCompatibleTextRenderingDefault(false);
    new MyApp().Run(args);
}

MyApp Class (MyApp.cs):

Create a new class named MyApp inheriting from WindowsFormsApplicationBase:

class MyApp : WindowsFormsApplicationBase
{
    protected override void OnCreateSplashScreen()
    {
        this.SplashScreen = new frmSplash();
    }

    protected override void OnCreateMainForm()
    {
        // Perform time-consuming operations here...
        // Example:  Simulate a long process
        System.Threading.Thread.Sleep(3000); 

        // Create the main form after background tasks are complete
        this.MainForm = new Form1();
    }
}

The key is the OnCreateMainForm method. Your lengthy background processes should execute within this method. Only after these operations are finished should you instantiate your main form (Form1). The splash screen will automatically close once MainForm is created.

This method elegantly handles splash screen display and closure, ensuring a smooth user experience without the need for complex manual synchronization. The WindowsFormsApplicationBase class provides built-in functionality to manage this process effectively.

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