c#制作簡單啟動畫面

啟動畫面是程序啟動加載組件時一個讓用戶稍微耐心等待的提示框。一個好的軟件在有啟動等待需求時必定做一個啟動畫面。啟動畫面可以讓用戶有心理准備來接受程序加載的緩慢，還可以讓用戶知道加載的進度和內容。本文只是記錄最簡單的構架。

VS2010創建一個C# Windows窗體應用程序，將主窗體改名為FormMain，再創建一個窗體起名為SplashScreen。向程序中加載一個圖片作為啟動畫面，如下圖

然後編輯SplashScreen.cs代碼

[csharp]
/// <summary>  
/// 啟動畫面  
/// </summary>  
public partial class SplashScreen : Form 
{ 
    /// <summary>  
    /// 啟動畫面本身  
    /// </summary>  
    static SplashScreen instance; 
 
    /// <summary>  
    /// 顯示的圖片  
    /// </summary>  
    Bitmap bitmap; 
 
    public static SplashScreen Instance 
    { 
        get 
        { 
            return instance; 
        } 
        set 
        { 
            instance = value; 
        } 
    } 
 
    public SplashScreen() 
    { 
        InitializeComponent(); 
 
        // 設置窗體的類型  
        const string showInfo = "啟動畫面：我們正在努力的加載程序，請稍後..."; 
        FormBorderStyle = FormBorderStyle.None; 
        StartPosition = FormStartPosition.CenterScreen; 
        ShowInTaskbar = false; 
        bitmap = new Bitmap(Properties.Resources.SplashScreen); 
        ClientSize = bitmap.Size; 
 
        using (Font font = new Font("Consoles", 10)) 
        { 
            using (Graphics g = Graphics.FromImage(bitmap)) 
            { 
                g.DrawString(showInfo, font, Brushes.White, 130, 100); 
            } 
        } 
 
        BackgroundImage = bitmap; 
    } 
 
    protected override void Dispose(bool disposing) 
    { 
        if (disposing && (components != null)) 
        { 
            if (bitmap != null) 
            { 
                bitmap.Dispose(); 
                bitmap = null; 
            } 
            components.Dispose(); 
        } 
        base.Dispose(disposing); 
    } 
 
    public static void ShowSplashScreen() 
    { 
        instance = new SplashScreen(); 
        instance.Show(); 
    } 
} 

 /// <summary>
 /// 啟動畫面
 /// </summary>
 public partial class SplashScreen : Form
 {
  /// <summary>
  /// 啟動畫面本身
  /// </summary>
  static SplashScreen instance;

  /// <summary>
  /// 顯示的圖片
  /// </summary>
  Bitmap bitmap;

  public static SplashScreen Instance
  {
   get
   {
    return instance;
   }
   set
   {
    instance = value;
   }
  }

  public SplashScreen()
  {
   InitializeComponent();

   // 設置窗體的類型
   const string showInfo = "啟動畫面：我們正在努力的加載程序，請稍後...";
   FormBorderStyle = FormBorderStyle.None;
   StartPosition = FormStartPosition.CenterScreen;
   ShowInTaskbar = false;
   bitmap = new Bitmap(Properties.Resources.SplashScreen);
   ClientSize = bitmap.Size;

   using (Font font = new Font("Consoles", 10))
   {
    using (Graphics g = Graphics.FromImage(bitmap))
    {
     g.DrawString(showInfo, font, Brushes.White, 130, 100);
    }
   }

   BackgroundImage = bitmap;
  }

  protected override void Dispose(bool disposing)
  {
   if (disposing && (components != null))
   {
    if (bitmap != null)
    {
     bitmap.Dispose();
     bitmap = null;
    }
    components.Dispose();
   }
   base.Dispose(disposing);
  }

  public static void ShowSplashScreen()
  {
   instance = new SplashScreen();
   instance.Show();
  }
 }
然後在主程序啟動時調用

[csharp]
static class Program 
{ 
    /// <summary>  
    /// 應用程序的主入口點。  
    /// </summary>  
    [STAThread] 
    static void Main() 
    { 
        Application.EnableVisualStyles(); 
        Application.SetCompatibleTextRenderingDefault(false); 
        // 啟動  
        SplashScreen.ShowSplashScreen(); 
 
        // 進行自己的操作：加載組件，加載文件等等  
        // 示例代碼為休眠一會  
        System.Threading.Thread.Sleep(3000); 
 
        // 關閉  
        if (SplashScreen.Instance != null) 
        { 
            SplashScreen.Instance.BeginInvoke(new MethodInvoker(SplashScreen.Instance.Dispose)); 
            SplashScreen.Instance = null; 
        } 
        Application.Run(new FormMain()); 
    } 
} 

 static class Program
 {
  /// <summary>
  /// 應用程序的主入口點。
  /// </summary>
  [STAThread]
  static void Main()
  {
   Application.EnableVisualStyles();
   Application.SetCompatibleTextRenderingDefault(false);
   // 啟動
   SplashScreen.ShowSplashScreen();

   // 進行自己的操作：加載組件，加載文件等等
   // 示例代碼為休眠一會
   System.Threading.Thread.Sleep(3000);

   // 關閉
   if (SplashScreen.Instance != null)
   {
    SplashScreen.Instance.BeginInvoke(new MethodInvoker(SplashScreen.Instance.Dispose));
    SplashScreen.Instance = null;
   }
   Application.Run(new FormMain());
  }
 }