CODEWITHSUNDEEP
c#
Ghaleon
Ghaleon

Reputation: 1196

Show a SplashScreen while loading form content

I have a SplashScreen , MainForm.

On my MainForm_Load I have a method named Connect();. This methods makes a verification of the connection of my RFID device with the SerialPort and it takes a few seconds to finish.

While it goes through the Connect() method, I want to show my SplashScreen. I tried this: 

private void Main_Load(object sender, EventArgs e)
{
    Frm_Splash s = new Frm_Splash();
    s.Show();
    Connect();            
}

The Connect(); method, shows a message using MessageBox. But when the SplashScreen is over, it cloeses itself AND closes the MessageBox aswell.

Here's my SplashScreen form code: 

private void timer1_Tick(object sender, EventArgs e)
{
    if (pbLoad.Value < 100)
       {
          pbLoad.Value = pbLoad.Value + 1;
       }
    else
       {
          timer1.Enabled = false;
          this.Close();
       }
}

I know it has something to do with the this.Close();. I just don't know how to fix it.

Maybe if I use this.Visible = false, but then the SplashScreen would not close, it would still be processing, just would be invisible... I think there is a better option.

Upvotes: 0

Views: 223

Answers (2)

Sayse
Sayse

Reputation: 43300

I imagine that you are opening your messagebox using MessageBox.Show()... Instead of this, use MessageBox.Show(this,"message");

I imagine what is happening is your messageboxes parent is set to the splash screen as that is the dialog with focus

Upvotes: 4

DonBoitnott
DonBoitnott

Reputation: 11025

Here's my splash screen:

namespace MyNamespace
{
    public partial class frmSplashScreen : Form
    {
        private static frmSplashScreen splashScreen = null;
        private static Thread splashThread = null;
        private Double opacityInc = .03;
        private Double opacityDec = .1;
        private const Int32 iTimerInterval = 30;

        public frmSplashScreen()
        {
            InitializeComponent();

            Opacity = .0;
            timer1.Interval = iTimerInterval;
            timer1.Start();
        }

        private void frmSplashScreen_Load(Object sender, EventArgs e)
        {
            CenterToScreen();
        }

        public static void ShowSplashScreen()
        {
            if (splashScreen != null)
                return;
            splashThread = new Thread(new ThreadStart(frmSplashScreen.ShowForm));
            splashThread.IsBackground = true;
            splashThread.SetApartmentState(ApartmentState.STA);
            splashThread.Start();
        }

        private static void ShowForm()
        {
            splashScreen = new frmSplashScreen();
            Application.Run(splashScreen);
        }

        public static void CloseForm()
        {
            if (splashScreen != null)
                splashScreen.opacityInc = -splashScreen.opacityDec;
            splashThread = null;
            splashScreen = null;
        }

        private void timer1_Tick(Object sender, EventArgs e)
        {
            if (opacityInc > 0)
            {
                if (Opacity < 1)
                    Opacity += opacityInc;
            }
            else
            {
                if (Opacity > 0)
                    Opacity += opacityInc;
                else
                    Close();
            }
        }
    }
}

I activate it by calling this in the constructor of the Form where I want it to pop-up from:

frmSplashScreen.ShowSplashScreen();

Then close it in Shown of the same Form:

frmSplashScreen.CloseForm();

NOTE: I offer this because it employs static classes, and that helps to alleviate the ownership issues.

Upvotes: 1

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