Question

我想问一下如何在加载程序时出现加载屏幕（只是图片或其他内容），并在程序加载完成后消失。

在发烧友版本中，我看到显示了进程条（％）。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％as作为属性/属性。

Answer 1

您需要创建一个表单作为启动画面，并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;
        }
    }
}

，主程序功能如下：

[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的问题，特别是在Citrix上。

示例：

Splash永远不会关闭
错误显示器上的启动画面
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。

启动表格：

public partial class Splash : Form
{
    public Splash()
    {
        InitializeComponent();
    }

    private void pictureBox1_Click(object sender, EventArgs e)
    {

    }
}

飞溅形式续：

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：

[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();
}

Answer 4

这是在打开应用程序时制作加载屏幕的更简单的方法。

async private void Form1_Shown(object sender, EventArgs e)
            {
                pictureBox1.Visible = true;
                await Task.Delay(2000);
                pictureBox1.Visible = false;
    
            }

Answer 5

你也可以用这个...（表单的名字是“Home.cs”）

std::cv_status::no_timeout

在表单的属性中：await Task.Delay(10000); this.Hide(); Home h1 = new Home(); h1.ShowDialog();

C＃WinForm - 加载屏幕

5 个答案: