C# Winform欢迎窗体实现(）

方法一、program.cs 中先启动欢迎窗体，然后注册程序运行空闲去执行主程序窗体相应初始化代码

 static void Main(string[] args)
        { 
            Application.EnableVisualStyles();                       //样式设置
            Application.SetCompatibleTextRenderingDefault(false);   //样式设置

            
             UIForm.WelcomeForm sp = new UIForm.WelcomeForm();       //启动窗体
             sp.Show();                                              //显示启动窗体
             context = new ApplicationContext();
             context.Tag = sp;
             Application.Idle += new EventHandler(Application_Idle); //注册程序运行空闲去执行主程序窗体相应初始化代码
             Application.Run(context); 
        }

    //初始化等待处理函数
        private static void Application_Idle(object sender, EventArgs e)
        {

            Application.Idle -= new EventHandler(Application_Idle);
            if (context.MainForm == null)
            {
                MainForm mw = new MainForm(_args);
                context.MainForm = mw;
                mw.InitForm();                                  //主窗体要做的初始化事情在这里，该方法在主窗体里应该申明为public
                UIForm.WelcomeForm sp = (UIForm.WelcomeForm)context.Tag;
                sp.Close();                                 //关闭启动窗体 
                mw.Show();                                  //启动主程序窗体
            }


        }

方法二、实现一个Splasher类，由主窗体操作欢迎窗体（受益于大神：键盘敲击者cncxz http://www.cnblogs.com/cncxz/archive/2006/07/14/450987.html）

首先创建一个名为ISplashForm的接口，该接口包含一个名为SetStatusInfo的方法以用来在启动屏幕上设置系统加载状态，代码如下：

 public interface ISplashForm
    {
        void SetStatusInfo(string statusInfo);
    }

 然后实现一个Splasher类，负责欢迎窗体的Show、Close和Status更新，代码如下：

  public class Splasher
    {
        private static Form splashForm = null;
        private static ISplashForm splashInterface = null;
        private static System.Threading.Thread splashThread = null;
        private static string tempStatus = string.Empty;

        public static void Show(Type splashFormType)
        {
            if (splashThread != null)
            {
                return;
            }
            if (splashFormType == null)
            {
                throw new Exception("必须设置启动窗体");
            }
            splashThread = new System.Threading.Thread(new System.Threading.ThreadStart(delegate()
            {
                createInstance(splashFormType);
                Application.Run(splashForm);
            }));
            splashThread.IsBackground = true;
            splashThread.SetApartmentState(System.Threading.ApartmentState.STA);
            splashThread.Start();
        }
        public static void Close()
        {
            if (splashThread == null || splashForm == null) return;
            try
            {
                splashForm.Invoke(new MethodInvoker(splashForm.Close));
            }
            catch (Exception ex)
            {
                Controller.MessageConsole.WriteLog(ex);
                HttpProxy.LogProxy.DoTask(ex, Controller.SQLiteController.Biz.GetAuthor());
            }
            splashThread = null;
            splashForm = null;
        }
        public static string Status
        {
            set
            {
                {
                    if (splashInterface == null || splashForm == null)
                    {
                        tempStatus = value;
                        return;
                    }
                    splashForm.Invoke(
                            new splashStatusChangedHandle(delegate(string str) { splashInterface.SetStatusInfo(str); }),
                            new object[] { value }
                        );
                }
            }
        }
        private static void createInstance(Type FormType)
        {
            object obj = FormType.InvokeMember(null, System.Reflection.BindingFlags.DeclaredOnly | BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.CreateInstance, null, null, null);
            splashForm = obj as Form;
            splashInterface = obj as ISplashForm;
            if (splashForm == null)
            {
                throw new Exception("启动窗体类型必须是System.Windows.Forms.Form的子类");
            }
            if (splashInterface == null)
            {
                throw new Exception("启动窗体必须实现ISplashForm接口");
            }
            if (!string.IsNullOrEmpty(tempStatus))
            {
                splashInterface.SetStatusInfo(tempStatus);
            }
        }
        private delegate void splashStatusChangedHandle(string NewStatusInfo);
    }

欢迎窗体代码如下：

 public partial class WelcomeForm : DevExpress.XtraEditors.XtraForm, ISplashForm
    {
        public WelcomeForm()
        {
            InitializeComponent();
            this.FormBorderStyle = FormBorderStyle.None;//取消窗体边框
            this.ShowInTaskbar = false;//取消任务栏图标显示
        }

        public void SetStatusInfo(string statusInfo)
        {
            this.lbInfo.Text = statusInfo;
        }
    }

主窗体需要初始化的地方调用代码如下：

           Splasher.Status = "正在初始化窗体...";
            InitializeComponent();
            //一系列初始化操作。。。
            //为Splasher.Status复制实现消息通知
            Splasher.Close();

program.cs Main函数中实现代码如下：

   UI.UIForm.Splasher.Show(typeof(UIForm.WelcomeForm));
   Application.Run(new MainForm(args));