使用計時器創建SplashScreen / LoadingScreen

Question

我創建了一個工作的SplashScreen/LoadingScreen 。

我使用以下代碼顯示和關閉LoadinScreen：

   LoadingScreen LS = new LoadingScreen();
   LS.Show();

   databaseThread = new Thread(CheckDataBase);
   databaseThread.Start();
   databaseThread.Join();

   LS.Close();

這段代碼對我來說非常LoadingScreen ，它顯示並關閉了LoadingScreen 。

問題是：我在LoadingScreen上看到一些文本，說： Loading Application...

我想創建一個計時器，以使text（Label）末尾的點執行以下操作：

Loading Application.

1秒后：

Loading Application..

1秒后：

Loading Application...

我想我需要在LoadingScreen form的Load_event中添加一個timer 。

我該如何實現？

Answer 1

它應該很簡單：

Timer timer = new Timer();
timer.Interval = 300;
timer.Tick += new EventHandler(methodToUpdateText);
timer.Start();

Answer 2

也許是這樣的嗎？

class LoadingScreen
{
    Timer timer0;
    TextBox mytextbox = new TextBox();
    public LoadingScreen()
    {
        timer0 = new System.Timers.Timer(1000);
        timer0.Enabled = true;
        timer0.Elapsed += new Action<object, System.Timers.ElapsedEventArgs>((object sender, System.Timers.ElapsedEventArgs e) =>
        {
            switch (mytextbox.Text) 
            {
                case "Loading":
                    mytextbox.Text = "Loading.";
                    break;
                case "Loading.":
                    mytextbox.Text = "Loading..";
                    break;
                case "Loading..":
                    mytextbox.Text = "Loading...";
                    break;
                case "Loading...":
                    mytextbox.Text = "Loading";
                    break;
            }
        });
    }
}

編輯：防止UI線程阻塞等待數據庫操作的一種好方法是將數據庫操作移至BackgroundWorker，例如：

public partial class App : Application
{
    LoadingScreen LS;   
    public void Main()
    {
        System.ComponentModel.BackgroundWorker BW;
        BW.DoWork += BW_DoWork;
        BW.RunWorkerCompleted += BW_RunWorkerCompleted;
        LS = new LoadingScreen();
        LS.Show();
    }

    private void BW_DoWork(System.Object sender, System.ComponentModel.DoWorkEventArgs e)
    {
        //Do here anything you have to do with the database
    }

    void BW_RunWorkerCompleted(object sender, System.ComponentModel.RunWorkerCompletedEventArgs e)
    {
        LS.Close();
    }
}