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c#.netsplash-screensingle-instance

Updating Splash labels in a SingleInstanceApplication : WindowsFormsApplicationBase


What is the best way to update splash sceen labels on application startup, to inform the user what's going on ? The problem is that the splash screen is created in an override method, while updating has to be done within the static main method, which can't access "this.SplashScreen".

class SingleInstanceApplication : WindowsFormsApplicationBase
{
    [STAThread]
    static void Main(string[] args)
    {
        SetSplashInfo("Data configuration", "Applying DataDirectory"); 
        //Can't be done, this method is static**
        //Do some stuff, code removed for reading purposes
    }

    protected override void OnCreateSplashScreen()
    {
        this.SplashScreen = new TestSplash();
        this.SplashScreen.TopMost = true; 

        base.OnCreateSplashScreen();
    }

    private void SetSplashInfo(string txt1, string txt2)
    {
        if (  this.SplashScreen == null)
            return;
       TestSplash splashFrm = (TestSplash)this.SplashScreen;
        splashFrm.label1.Text = txt1;
        splashFrm.label2.Text = txt2;
    }
}

Solution

  • Yes, you need a reference to the SingleInstanceApplication object. Since there is only ever one of them, you can cheat:

    class SingleInstanceApplication : WindowsFormsApplicationBase {
        private static SingleInstanceApplication instance;
        public SingleInstanceApplication() {
           instance = this;
        }
    }
    

    Now you can use instance.SplashScreen to always get a reference to the splash screen and make SetSplashInfo() static. A clean fix should be possible but I can't see how you are creating the SingleInstanceApplication instance.