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));