翻译强力驱动I would like to ask how to make a loading screen (just a picture or something) that appears while the program is being loaded, and disappears when the program has finished loading.
in fancier versions, I have seen the process bar (%) displayed. how can you have that, and how do you calculate the % to show on it?
I know there is a Form_Load() event, but I do not see a Form_Loaded() event, or the % as a property / attribute anywhere.
all you need to create one form as splash screen and show it before you main start showing the landing page and close this splash once the landing page loaded.
using System.Threading; using System.Windows.Forms; namespace MyTools { public class SplashForm : Form { //Delegate for cross thread call to close private delegate void CloseDelegate(); //The type of form to be displayed as the splash screen. private static SplashForm splashForm; static public void ShowSplashScreen() { // Make sure it is only launched once. if (splashForm != null) return; Thread thread = new Thread(new ThreadStart(SplashForm.ShowForm)); thread.IsBackground = true; thread.SetApartmentState(ApartmentState.STA); thread.Start(); } static private void ShowForm() { splashForm = new SplashForm(); Application.Run(splashForm); } static public void CloseForm() { splashForm.Invoke(new CloseDelegate(SplashForm.CloseFormInternal)); } static private void CloseFormInternal() { splashForm.Close(); splashForm = null; } } }and the main program function looks like this:
[STAThread] static void Main(string[] args) { SplashForm.ShowSplashScreen(); MainForm mainForm = new MainForm(); //this takes ages SplashForm.CloseForm(); Application.Run(mainForm); }If you're going to show the SplashForm more than once in your application, be sure to set the splashForm variable to null otherwise you'll get an error.
static private void CloseFormInternal() { splashForm.Close(); splashForm = null; }