c# winform 欢迎界面时加载数据

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace WindowsFormsApplication1
{
    public partial class WelcomeForm : Form
    {
        public WelcomeForm()
        {
            InitializeComponent();
        }

        private void WelcomeForm_Load(object sender, EventArgs e)
        {
            //Thread.Sleep(2000);
            //this.Close();
            //this.Dispose();
        }

        public void KillMe(object o, EventArgs e)
        {
            this.Close();
        }

        /// <summary>
        /// 加载并显示主窗体
        /// </summary>
        /// <param name="form">主窗体</param>
        public static void LoadAndRun(Form form)
        {
            //订阅主窗体的句柄创建事件
            form.HandleCreated += delegate
            {
                //启动新线程来显示Splash窗体
                new Thread(new ThreadStart(delegate
                {
                    WelcomeForm splash = new WelcomeForm();
                    //订阅主窗体的Shown事件
                    form.Shown += delegate
                    {
                        //通知Splash窗体关闭自身
                        splash.Invoke(new EventHandler(splash.KillMe));
                        splash.Dispose();
                    };
                   // Thread.Sleep(2000);
                    //显示Splash窗体
                    Application.Run(splash);
                })).Start();
            };
            //显示主窗体
            Application.Run(form);
        }

    }
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            //Thread.Sleep(2000);
            for (int i = ; i < ; i++)
            {
                Thread.Sleep();
            }
            //this.Focus();
            MessageBox.Show("加载完毕！");
        }
    }
}

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;
using System.Threading;

namespace WindowsFormsApplication1
{
    static class Program
    {
        /// <summary>
        /// 应用程序的主入口点。
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            WelcomeForm.LoadAndRun(new Form1());
        }
    }
}