C# Timer 元件實戰：讓視窗飄動起來（二）完整原始碼與總結

完整原始碼：Form1.cs

using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;

namespace FloatingForm
{
    public class Form1 : Form
    {
        private Timer timer1;
        private Timer timer2;
        private Label label1;
        private Button button1;
        private Container components;

        public Form1()
        {
            InitializeComponent();
        }

        protected override void Dispose(bool disposing)
        {
            if (disposing && components != null)
                components.Dispose();
            base.Dispose(disposing);
        }

        private void InitializeComponent()
        {
            components = new Container();
            timer1 = new Timer(components);
            timer2 = new Timer(components);
            label1 = new Label();
            button1 = new Button();
            
            this.SuspendLayout();
            
            // Timer1: 向右移動 (每 10ms)
            timer1.Enabled = true;
            timer1.Interval = 10;
            timer1.Tick += Timer1_Tick;
            
            // Timer2: 向左移動 (每 10ms，初始停用)
            timer2.Enabled = false;
            timer2.Interval = 10;
            timer2.Tick += Timer2_Tick;
            
            // Button: 停止飄動
            button1.Font = new Font("新細明體", 10);
            button1.Location = new Point(1, 8);
            button1.Name = "button1";
            button1.Size = new Size(80, 25);
            button1.TabIndex = 0;
            button1.Text = "停止飄動";
            button1.Click += Button1_Click;
            
            // Label: 顯示文字
            label1.Font = new Font("新細明體", 22F, FontStyle.Bold);
            label1.Location = new Point(8, 38);
            label1.Name = "label1";
            label1.Size = new Size(344, 40);
            label1.TabIndex = 1;
            label1.Text = "用 Visual C# 做的飄動視窗！";
            
            // Form 設定
            this.AutoScaleBaseSize = new Size(5, 13);
            this.ClientSize = new Size(352, 70);
            this.Controls.Add(label1);
            this.Controls.Add(button1);
            this.Name = "Form1";
            this.Text = "用 Visual C# 做的飄動視窗！";
            this.Load += Form1_Load;
            this.ResumeLayout(false);
        }

        [STAThread]
        static void Main()
        {
            Application.Run(new Form1());
        }

        // 設定初始位置 (螢幕座標 0, 240)
        private void Form1_Load(object sender, EventArgs e)
        {
            this.DesktopLocation = new Point(0, 240);
        }

        // 向右移動：X + 1，到達 550 切換 Timer2
        private void Timer1_Tick(object sender, EventArgs e)
        {
            Point p = new Point(this.DesktopLocation.X + 1, this.DesktopLocation.Y);
            this.DesktopLocation = p;
            
            if (p.X == 550)
            {
                timer1.Enabled = false;
                timer2.Enabled = true;
            }
        }

        // 向左移動：X - 1，到達 -150 切換 Timer1
        private void Timer2_Tick(object sender, EventArgs e)
        {
            Point p = new Point(this.DesktopLocation.X - 1, this.DesktopLocation.Y);
            this.DesktopLocation = p;
            
            if (p.X == -150)
            {
                timer1.Enabled = true;
                timer2.Enabled = false;
            }
        }

        // 停止所有 Timer
        private void Button1_Click(object sender, EventArgs e)
        {
            timer1.Stop();
            timer2.Stop();
        }
    }
}

核心技術點總結

擴充練習建議

1. 垂直飄動：修改 Y 座標，增加 timer3/timer4 控制上下移動
2. 隨機飄動：引入 Random 讓方向、速度、邊界隨機變化
3. 隱藏邊框：FormBorderStyle = None，填入精美圖片當背景
4. 多視窗協同：多個 Form 以不同軌跡飄動
5. 螢幕邊界反彈：使用 Screen.PrimaryScreen.WorkingArea 計算真實邊界

總結

Timer 元件雖屬性事件極少，但善用可產生意想不到效果。本範例展示雙 Timer 交替控制視窗位置，實現水平來回飄動。掌握 DesktopLocation、Timer.Interval、Tick 事件 三要素，即可實作各類定時動畫與輪詢邏輯。