c# one Form blocking another in a winform Project

Question

I have an application which uses 2 forms, a Main Form and a Splash Form being used in the following configuration:

public class MainForm : Form
{
    public MainForm()
    {
       SplashScreen splash = new SplashScreen();

       // configure Splash Screen
    }
}


public class SplashScreen
{
    public SplashScreen()
    {
       InitializeComponent();

       // perform initialization

       this.ShowDialog();
       this.BringToFront();
    }
}

NB: Main form is created with the following code:

Application.Run( new MainForm() );

The problem above is that the configuration of splash does not occur unless splash is closed with

splash.Close();

only when this occurs does the rest of the MainForm constructor run. how can I easily stop this blocking behaviour?

Seems like the error is likely inside your SplashScreen constructor. Can you post that code as well? — Harper Shelby, Feb 04 '09 at 16:27

score 1 · Answer 1 · answered Feb 04 '09 at 16:29

1

Generally, you need to show splash screens on a separate thread, and let the primary thread carry on with loading. Not trivial - in particular, you will need to use Control.Invoke to ask the splash screen to close itself when ready (thread affinity)...

answered Feb 04 '09 at 16:29

Marc Gravell

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score 1 · Accepted Answer · edited May 23 '17 at 12:13

1

I already replied to you with a working example on the other question you asked for the same thing:

C# winforms startup (Splash) form not hiding

edited May 23 '17 at 12:13

Community

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answered Feb 04 '09 at 16:33

Grzenio

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Apologies. This is a different problem to the above question, although you are correct in saying your solution might work for this problem as well. I will have to give it a try. – TK. Feb 04 '09 at 16:38

score 0 · Answer 3 · answered Feb 04 '09 at 16:29

0

Use splash.Open() rather than splash.OpenDialog() and this won't happen.

answered Feb 04 '09 at 16:29

Yes - that Jake.

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score 0 · Answer 4 · answered Feb 04 '09 at 16:31

Basically, you want to just show you splash form, but not let it block the main form.

Here's how I've done it:

class MainForm : Form {

    SplashScreen splash = new SplashScreen();  //Make your splash screen member

    public MainForm()
    {
        splash.Show();  //Just show the form
    }

}

Then in your MainForm_Load you do your initialization as normal.

Now when your form is ready to be displayed (MainForm_Shown):

public MainForm_Shown()
{
    splash.Close();
}

This lets your MainForm load normally while displaying the splash screen.

c# one Form blocking another in a winform Project

4 Answers4