如何在 Windows Forms C# 中执行代码时显示动画加载表单

Question

我想在主窗体中执行一些代码时显示动画加载窗体。动画形式仅用于向用户显示操作正在执行，我想在操作完成后关闭它。我使用的代码是：

    public partial class Form_main_admin : Form
    {
        private Thread loadingThread;
        private string loadingText;

        public Form_main_admin()
        {
            InitializeComponent();
        }

     private void main_tabControl_SelectedIndexChanged(object sender, EventArgs e)
     { 
         switch (main_tabControl.SelectedIndex)
         {
             case 0:
                 // ...
                 break;
             case 1:
                 showLoadingForm("Loading");

                 // Load a datagridview (load data, adjust column widths) in Form_main_admin

                 closeLoadingForm();
                 break;
            }
    }

    private void showLoadingForm(string text)
    {
         loadingText = text;
         loadingThread = new Thread(new ThreadStart(openLoadingForm));
         loadingThread.Start();
    }

    private void openLoadingForm()
    {
         try
         {
             Form_loading loadingForm = new Form_loading(loadingText);
             loadingForm.ShowDialog();
         }
         catch 
         {
             Thread.ResetAbort();
         }
     }

     private void closeLoadingForm()
     {
         try
         {
             loadingThread.Abort();
         }
         catch 
         {
             Thread.ResetAbort();
         }

     }
}

问题是当我在选项卡之间快速切换时出现 "Thread was being aborted" 异常（请参见下面 link 中的图像）。

http://postimg.org/image/bvre2bmi5/

我不希望用户切换标签太快时看到此异常。在阅读了该论坛上的其他帖子后，我意识到不推荐我的实现。有人可以告诉我如何正确实现此功能吗？

Answer 1

如果您需要动画进度表，请尝试使用 BackgroundWorker class 在附加线程中执行加载：

    public partial class MainForm : Form
    {
        /// <summary>
        /// Some progress form
        /// </summary>
        WaitForm waitForm = new WaitForm();

        /// <summary>
        /// https://msdn.microsoft.com/library/cc221403(v=vs.95).aspx
        /// </summary>
        BackgroundWorker worker = new BackgroundWorker();

        public MainForm()
        {
            InitializeComponent();

            worker.DoWork += (sender, args) => PerformReading();
            worker.RunWorkerCompleted += (sender, args) => ReadingCompleted();
        }

        /// <summary>
        /// This method will be executed in an additional thread
        /// </summary>
        void PerformReading()
        {
            //some long operation here
            Thread.Sleep(5000);
        }

        /// <summary>
        /// This method will be executed in a main thread after BackgroundWorker has finished
        /// </summary>
        void ReadingCompleted()
        {                        
           waitForm.Close();
        }
        
        private void button1_Click(object sender, EventArgs e)
        {
            //Run reading in an additional thread
            worker.RunWorkerAsync();
            //Show progress form in a main thread
            waitForm.ShowDialog();
        }
    }

如何在 Windows Forms C# 中执行代码时显示动画加载表单

How to show an animated loading form while executing code in Windows Forms C#

c#

forms

winforms

splash-screen