public static void Sleep (int millisecondsTimeout);

// 使用Sleep方法動(dòng)態(tài)時(shí)間
namespace _065
{
    public partial class Form1 : Form
    {
        private Label? label1;
        private static TextBox? textBox1;
 
        public Form1()
        {
            InitializeComponent();
            Load += Form1_Load;
        }
        private void Form1_Load(object? sender, EventArgs e)
        {
            // 
            // label1
            // 
            label1 = new Label
            {
                AutoSize = true,
                Location = new Point(12, 8),
                Name = "label1",
                Size = new Size(188, 17),
                TabIndex = 0,
                Text = "每秒種獲取一次系統(tǒng)時(shí)間并顯示："
            };
            // 
            // textBox1
            // 
            textBox1 = new TextBox
            {
                ForeColor = Color.Red,
                Location = new Point(12, 29),
                Multiline = true,
                Name = "textBox1",
                Size = new Size(360, 45),
                TabIndex = 1
            };
            // 
            // Form1
            // 
            AutoScaleDimensions = new SizeF(7F, 17F);
            AutoScaleMode = AutoScaleMode.Font;
            ClientSize = new Size(384, 86);
            Controls.Add(textBox1);
            Controls.Add(label1);
            Name = "Form1";
            StartPosition = FormStartPosition.CenterScreen;
            Text = "用Sleep方法動(dòng)態(tài)顯示時(shí)間";
            Sleep_Func();
        }
        private static void Sleep_Func()
        {
            Thread th = new(      //創(chuàng)建線程對(duì)象
                () =>             //使用Lambda表達(dá)式
                {
                    while (true)  //無(wú)限循環(huán)
                    {
                        Parallel.Invoke(//在窗體線程中執(zhí)行
                          () =>   //使用Lambda表達(dá)式
                            {
                                textBox1!.Text = //顯示系統(tǒng)時(shí)間
                                    DateTime.Now.ToString("F");
                            });
                        Thread.Sleep(1000);      //線程掛起1000毫秒
                    }
                })
            {
                IsBackground = true   //設(shè)置線程為后臺(tái)線程
            };
            th.Start();               //開(kāi)始執(zhí)行線程
        }
    }
}