几秒钟后加载form2并关闭form1

Question

我想知道几秒钟后如何关闭form1。 它本质上是带有一些数据的加载形式。 我希望显示Form1半分钟，然后我需要关闭Form1并在使用Visual C＃打开Windows Form应用程序的地方打开form2。

任何人的任何编码帮助！！！ 请

Answer 1

您可以使用Timer等待指定的时间。

尝试这个：

System.Windows.Forms.Timer timer1 = new System.Windows.Forms.Timer();
timer1.Interval=30000;
timer1.Tick += new System.EventHandler(timer1_Tick);
timer1.Start();

private void timer1_Tick(object sender, EventArgs e)
{
   timer1.Stop();
   this.Hide();
   new Form2().Show();
}

Answer 2

您可以使用ApplicationContext类来完成此工作：

    public class CustomApplicationContext : ApplicationContext
    {
        Form mainForm = null;
        Timer timer = new Timer();

        public CustomApplicationContext(Form mainForm,Form timed):base(timed)
        {
            this.mainForm = mainForm;

            timer.Tick += new EventHandler(SplashTimeUp);
            timer.Interval = 30000;
            timer.Enabled = true;
        }

        private void SplashTimeUp(object sender, EventArgs e)
        {
            timer.Enabled = false;
            timer.Dispose();

            base.MainForm.Close();
        }

        protected override void OnMainFormClosed(object sender, EventArgs e)
        {
            if (sender is Form1)
            {
                base.MainForm = this.mainForm;
                base.MainForm.Show();
            }
            else if (sender is Form2)
            {
                base.OnMainFormClosed(sender, e);
            }
        }


    }

然后在您的Program.cs中的Main（）中：

[STAThread]
static void Main()
{
     Application.EnableVisualStyles();
     Application.SetCompatibleTextRenderingDefault(false);
     CustomApplicationContext app = new CustomApplicationContext(new Form2(),new Form1());
     Application.Run(app);

}

这样，您就不需要Form1中的计时器，只需在指定的时间量内拥有所需的功能，然后它将关闭，然后显示Form2。

Answer 3

将以下代码用于启动屏幕并调用form1。

 Form2 _f2;
    public Form1()
    {
        InitializeComponent();
        backgroundWorker1.WorkerReportsProgress = true;
        backgroundWorker1.WorkerSupportsCancellation = true;
        _f2 = new Form2();
    }

    private void Form1_Load(object sender, EventArgs e)
    {
        if (backgroundWorker1.IsBusy != true)
        {
            _f2.Show();
            this.WindowState = FormWindowState.Minimized;
            this.ShowInTaskbar = false;
            // Start the asynchronous operation.
            backgroundWorker1.RunWorkerAsync();
        }
    }

    private void btnStart_Click(object sender, EventArgs e)
    {

    }

    private void btnCancle_Click(object sender, EventArgs e)
    {
        if (backgroundWorker1.WorkerSupportsCancellation == true)
        {

            // Cancel the asynchronous operation.
            backgroundWorker1.CancelAsync();
        }
    }

    private void backgroundWorker1_DoWork(object sender, DoWorkEventArgs e)
    {
        BackgroundWorker worker = sender as BackgroundWorker;

        for (int i = 1; i <= 100; i++)
        {
            if (worker.CancellationPending == true)
            {
                e.Cancel = true;
                break;
            }
            else
            {
                // Perform a time consuming operation and report progress.
                System.Threading.Thread.Sleep(500);


            }
        }
    }

    private void backgroundWorker1_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {

    }

    private void backgroundWorker1_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
    {
        _f2.Close();
        this.WindowState = FormWindowState.Normal;
        this.ShowInTaskbar = true;

    }

}