在应用程序启动时隐藏主窗体的最佳方法是什么

Question

What is the best way to hide the main form on application's startup to show it later?

If I just call the Hide method in the Load event of this form it gives a terrible flash for some time before actually hiding it.

Thanks in advance.

Answer 1

The simplest way is to set Opacity = 0 in the designer. Of course you will want to set it back to 100 at some point later..

Or you may want to use a splash screen, maybe like this:

static class Program
{
    /// <summary>
    /// Der Haupteinstiegspunkt für die Anwendung.
    /// </summary>
    [STAThread]
    static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Splash splash = new Splash();
        splash.Show();
        Application.Run();
    }
}

With a splash screen:

public partial class Splash : Form
{
    public Splash()
    {
        InitializeComponent();
    }

    Form1 form1 = new Form1();

    private void Splash_Load(object sender, EventArgs e)
    {

        form1.WindowState = FormWindowState.Minimized;
        form1.Hide();
    }

}

You can then show it for example when the splash screen is closed:

private void Splash_FormClosed(object sender, FormClosedEventArgs e)
{
    form1.Show();
    form1.WindowState = FormWindowState.Normal;
}

Which would happen whenever you want or maybe after some time:

public Splash()
{
  InitializeComponent();
  Timer timer = new Timer();
  timer.Interval = 5000;
  timer.Enabled = true;
  timer.Tick +=  (s,e) =>{ this.Close();};
}

Since the program is not watching a Form to close we also need to add this to the main form's closed event:

private void Form1_FormClosed(object sender, FormClosedEventArgs e)
{
    Application.Exit();
}

If you don't want the splash screen to be visible at all you can hide it like this:

public Splash()
{
   InitializeComponent();
   this.Opacity = 0;

But please make sure you don't leave the users in the blind: When I start a program I want immediate response!!

Answer 2

You can proceed like this:

private void Form1_Load(object sender, EventArgs e)
{
  if (Settings.Instance.HideAtStartup)
  {
    BeginInvoke(new MethodInvoker(delegate
    {
        Hide();
    }));
}
}

An alternative way can be to use the Application.Run(Form) method. You can create the main form with its Visible property initially set to false , and provide no argument to Application.Run() in main loop.

Answer 3

Modify your Program class - this is where the form is created and shown:

static class Program {
    /// <summary>
    /// The main entry point for the application.
    /// </summary>
    [STAThread]
    static void Main () {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Form1 frm = new Form1();
        frm.Visible = false;
        Application.Run();
    }
}

Hopefully your adding some sort of user interface?