C＃WinForm – 加载屏幕

我想问一下如何在加载程序时创建一个加载屏幕（只是一张图片或其他东西），并在程序加载完成后消失。

在发烧友的版本中，我看到了显示的进程条（％）。 你怎么能拥有它，你如何计算显示在它上面的百分比？

我知道有一个Form_Load（）事件，但我没有看到Form_Loaded（）事件，或者％作为属性/属性。

Answer 1

您只需要创建一个表单作为启动画面，然后在主开始显示登录页面之前显示它，并在加载登录页面后关闭此启动画面。

using System.Threading; using System.Windows.Forms; namespace MyTools { public class SplashForm : Form { //Delegate for cross thread call to close private delegate void CloseDelegate(); //The type of form to be displayed as the splash screen. private static SplashForm splashForm; static public void ShowSplashScreen() { // Make sure it is only launched once. if (splashForm != null) return; Thread thread = new Thread(new ThreadStart(SplashForm.ShowForm)); thread.IsBackground = true; thread.SetApartmentState(ApartmentState.STA); thread.Start(); } static private void ShowForm() { splashForm = new SplashForm(); Application.Run(splashForm); } static public void CloseForm() { splashForm.Invoke(new CloseDelegate(SplashForm.CloseFormInternal)); } static private void CloseFormInternal() { splashForm.Close(); splashForm = null; } } } 

并且主程序function如下所示：

 [STAThread] static void Main(string[] args) { SplashForm.ShowSplashScreen(); MainForm mainForm = new MainForm(); //this takes ages SplashForm.CloseForm(); Application.Run(mainForm); } 

Answer 2

如果您要在应用程序中多次显示SplashForm，请确保将splashForm变量设置为null，否则您将收到错误。

 static private void CloseFormInternal() { splashForm.Close(); splashForm = null; } 

Answer 3

我遇到了我发现的所有其他解决方案的问题，特别是那些在gui线程以外的其他线程中显示启动的问题，特别是在Citrix上。

例：

• 飞溅永远不会关闭
• 在错误的显示器上飞溅显示
• Splash show ok，但是mainform显示在所有其他窗口后面

我最终得到了它，似乎运作良好。

飞溅forms：

 public partial class Splash : Form { public Splash() { InitializeComponent(); } private void pictureBox1_Click(object sender, EventArgs e) { } } 

飞溅forms续：

 partial class Splash { private System.ComponentModel.IContainer components = null; protected override void Dispose(bool disposing) { if (disposing && (components != null)) { components.Dispose(); } base.Dispose(disposing); } private void InitializeComponent() { System.ComponentModel.ComponentResourceManager resources = new System.ComponentModel.ComponentResourceManager(typeof(Splash)); this.pictureBox1 = new System.Windows.Forms.PictureBox(); ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).BeginInit(); this.SuspendLayout(); // // pictureBox1 // this.pictureBox1.Dock = System.Windows.Forms.DockStyle.Fill; this.pictureBox1.Image = ((System.Drawing.Image)(resources.GetObject("pictureBox1.Image"))); this.pictureBox1.Location = new System.Drawing.Point(0, 0); this.pictureBox1.Name = "pictureBox1"; this.pictureBox1.Size = new System.Drawing.Size(512, 224); this.pictureBox1.TabIndex = 0; this.pictureBox1.TabStop = false; this.pictureBox1.Click += new System.EventHandler(this.pictureBox1_Click); // // Splash // this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F); this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font; this.ClientSize = new System.Drawing.Size(512, 224); this.ControlBox = false; this.Controls.Add(this.pictureBox1); this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None; this.Name = "Splash"; this.ShowIcon = false; this.ShowInTaskbar = false; this.StartPosition = System.Windows.Forms.FormStartPosition.CenterScreen; this.Text = "Splash"; ((System.ComponentModel.ISupportInitialize)(this.pictureBox1)).EndInit(); this.ResumeLayout(false); } #endregion private System.Windows.Forms.PictureBox pictureBox1; } 

主要：

 [STAThread] static void Main(string[] _args) { ShowSplash(); MainForm mainForm = new MainForm(); Application.Run(mainForm); } private static void ShowSplash() { Splash sp = new Splash(); sp.Show(); Application.DoEvents(); System.Windows.Forms.Timer t = new System.Windows.Forms.Timer(); t.Interval = 1000; t.Tick += new EventHandler((sender, ea) => { sp.BeginInvoke(new Action(() => { if (sp != null && Application.OpenForms.Count > 1) { sp.Close(); sp.Dispose(); sp = null; t.Stop(); t.Dispose(); t = null; } })); }); t.Start(); }