winform 使用SplashScreen窗口

SplashScreen，就是平时我们说的溅射屏幕，任何一个做过客户端程序的coder应该对它都不陌生，因为它能提升用户体验，让软件看上去更美。SplashScreenForm通常进入程序时是打开，主窗体加载完毕后退出。一般来说，SplashScreenForm比较简洁，窗体的内容只是显示程序主题、版权等信息；复杂些的，可以显示主程序的加载项目情况。

　　下面是我实现的一个SplashScreen类：

using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.Threading;
using System.Reflection;

namespace SplashScreen
{
    public class SplashScreen
    {
        private static object _obj = new object();

        private static Form _SplashForm = null;

        private static Thread _SplashThread = null;

        private delegate void ChangeFormTextdelegate(string s);

        public static void Show(Type splashFormType)
        {
            if (_SplashThread != null)
                return;
            if (splashFormType == null)
            {
                throw (new Exception());
            }

            _SplashThread = new Thread(new ThreadStart(delegate()
            {
                CreateInstance(splashFormType);
                Application.Run(_SplashForm);
            }));

            _SplashThread.IsBackground = true;
            _SplashThread.SetApartmentState(ApartmentState.STA);
            _SplashThread.Start();
        }

        public static void ChangeTitle(string status)
        {
            ChangeFormTextdelegate de = new ChangeFormTextdelegate(ChangeText);
            _SplashForm.Invoke(de, status);
        }

        public static void Close()
        {
            if (_SplashThread == null || _SplashForm == null) return;

            try
            {
                _SplashForm.Invoke(new MethodInvoker(_SplashForm.Close));
            }
            catch (Exception)
            {
            }
            _SplashThread = null;
            _SplashForm = null;
        }

        private static void ChangeText(string title)
        {
            _SplashForm.Text = title.ToString();
        }

        private static void CreateInstance(Type FormType)
        {
            if (_SplashForm == null)
            {
                lock (_obj)
                {
                    object obj = FormType.InvokeMember(null,
                                        BindingFlags.DeclaredOnly |
                                        BindingFlags.Public | BindingFlags.NonPublic |
                                        BindingFlags.Instance | BindingFlags.CreateInstance, null, null, null);
                    _SplashForm = obj as Form;
                    _SplashForm.TopMost = true;
                    _SplashForm.ShowInTaskbar = false;
                    _SplashForm.BringToFront();
                    _SplashForm.StartPosition = FormStartPosition.CenterScreen;
                    if (_SplashForm == null)
                    {
                        throw (new Exception());
                    }
                }
            }
        }
    }
}

调用的时候只需要传入你需要作为溅射屏幕的窗体，然后在主窗体加载完毕后调用close方法：

namespace SplashScreen
{
    public partial class MainForm : Form
    {
        public MainForm()
        {
            SplashScreen.Show(typeof(SplashForm));
            InitializeComponent();
            Thread.Sleep(1000);
            SplashScreen.ChangeTitle("111");
            Thread.Sleep(1000);
            SplashScreen.ChangeTitle("222");
            Thread.Sleep(1000);
            SplashScreen.ChangeTitle("333");
            Thread.Sleep(1000);
            SplashScreen.ChangeTitle("444");
            SplashScreen.Close();
        }
    }
}