原文如下:
本代码可以依据主程序加载进度来显示Splash。
static class Program
{
/// <summary>
/// 主程序的入口点在此设置,包括一些初始化操作,启动窗体等
/// </summary>
private static ApplicationContext context;
[STAThread]
static void Main()
{
Application.EnableVisualStyles(); //样式设置
Application.SetCompatibleTextRenderingDefault(false); //样式设置
Splash sp = new Splash(); //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)
{
Main mw = new Main();
context.MainForm =mw;
mw.init(); //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
Splash sp = (Splash)context.Tag;
sp.Close(); //关闭启动窗体
mw.Show(); //启动主程序窗体
}
}
}
Splash窗体的相关属性设置:
BackgroundImage:载入你想作为启动画面的图片;
ControlBox:False;
FormBorderStyle:None;
ShowInTaskbar:False;
StartPositon:CenterScreen.
[转]
http://www.lordong.cn/blog/post/18.html
当程序在启动过程中需要花一些时间去加载资源时,我们希望程序能显示一个欢迎界面,能简单介绍软件功能的同时还能告知用户该程序还在加载中,使得用户体验更友好。
实现如下:
1. 添加欢迎界面的窗体(比如SlpashForm),做以下调整:
将FormBorderStyle属性设成None,即没有窗体边框
将StartPosition属性设成CenterScreen,即总是居中
将TopMost属性设成True,即总是在顶部
将UseWaitCursor属性设成Ture,即显示等待光标,让人感觉后台还在运行
增加一个PictureBox控件,与欢迎图片大小一致,窗体的大小也设成一致
增加一个ProgressBar控件,将Style设成Marquee,将MarqueeAnimationSpeed设成50
2. 主界面的构造函数改成以下代码:
// Create thread to show splash window
Thread showSplashThread = new Thread(new ThreadStart(ShowSplash));
showSplashThread.Start();
// Time consumed here
InitializeFrame(); // 把原来构造函数中的所有代码移到该函数中
// Abort show splash thread
showSplashThread.Abort();
showSplashThread.Join(); // Wait until the thread aborted
showSplashThread = null;
3. 显示SplashForm的线程函数
///
/// Thread to show the splash.
///
private void ShowSplash()
{
SplashForm sForm = null;
try
{
sForm = new SplashForm();
sForm.ShowDialog();
}
catch (ThreadAbortException e)
{
// Thread was aborted normally
if (_log.IsDebugEnabled)
{
_log.Debug(“Splash window was aborted normally: ” + e.Message);
}
}
finally
{
sForm = null;
}
}
4. 在主窗体的Load事件加激活自己的代码
SetForegroundWindow(Process.GetCurrentProcess().MainWindowHandle);
在使用SetForegroundWindow之前先声明一下
// Uses to active the exist window
[DllImport(“User32.dll”)]
public static extern void SetForegroundWindow(IntPtr hwnd);
对于需要加载很多组件的应用程序来说,在启动的时候会非常的缓慢,可能会让用户误以为程序已经死掉,这显然不是我们希望看到的。如果能够在启动的时候动态的给用户一些反馈信息(比如当前正在加载的项),那么就可以有效的避免这一问题,并且可以给我们的应用程序增色不少。下边的图片是此代码的效果图。
下面是部分代码:
AppStart 类,包含Main方法
public class AppStart
{
public AppStart()
{
}
[STAThread]
static void Main(string[] args)
{
// 显示Splash窗体
Splash.Show();
DoStartup(args);
// 关闭Splash窗体
Splash.Close();
}
static void DoStartup(string[] args)
{
// 做需要的事情
frmMain f = new frmMain();
Application.Run(f);
}
}
Splash功能类:
public class Splash
{
static frmSplash MySplashForm = null;
static Thread MySplashThread = null;
static void ShowThread()
{
MySplashForm = new frmSplash();
Application.Run(MySplashForm);
}
static public void Show()
{
if (MySplashThread != null)
return;
MySplashThread = new Thread(new ThreadStart(Splash.ShowThread));
MySplashThread.IsBackground = true;
MySplashThread.ApartmentState = ApartmentState.STA;
MySplashThread.Start();
}
static public void Close()
{
if (MySplashThread == null) return;
if (MySplashForm == null) return;
try
{
MySplashForm.Invoke(new MethodInvoker(MySplashForm.Close));
}
catch (Exception)
{
}
MySplashThread = null;
MySplashForm = null;
}
static public string Status
{
set
{
if (MySplashForm == null)
{
return;
}
MySplashForm.StatusInfo = value;
}
get
{
if (MySplashForm == null)
{
throw new InvalidOperationException(“Splash Form not on screen“);
}
return MySplashForm.StatusInfo;
}
}
}
Splash 界面类:
public class frmSplash : System.Windows.Forms.Form
{
private string _StatusInfo = “”;
public frmSplash()
{
InitializeComponent();
}
private void InitializeComponent()
{
//
this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject(“pictureBox1.Image“)));
//
}
public string StatusInfo
{
set
{
_StatusInfo = value;
ChangeStatusText();
}
get
{
return _StatusInfo;
}
}
public void ChangeStatusText()
{
try
{
if (this.InvokeRequired)
{
this.Invoke(new MethodInvoker(this.ChangeStatusText));
return;
}
labStatus.Text = _StatusInfo;
}
catch (Exception e)
{
// 异常处理
}
}
}
主界面类:
public class frmMain : System.Windows.Forms.Form
{
public frmMain()
{
InitializeComponent();
Splash.Status = “状态:载入初始化模块“;
System.Threading.Thread.Sleep(1000);
Splash.Status = “状态:载入管理模块“;
System.Threading.Thread.Sleep(1000);
Splash.Status = “状态:载入打印模块“;
System.Threading.Thread.Sleep(1000);
Splash.Status = “状态:载入插件模块“;
System.Threading.Thread.Sleep(1000);
Splash.Status = “状态:连接数据库“;
System.Threading.Thread.Sleep(1000);
Splash.Close();
}
}