c#自制抽奖小程序

        #region 第一部分界面设计
        const int N = 8;
        Button button = new Button();
        Image[] images = new Image[N];
        PictureBox[] pictures = new PictureBox[N];
        int[] dx = new int[N] { 112, 112, 0, 0, -113, -113, 0, 0 };
        int[] dy = new int[N] { 0, 0, 113, 113, 0, 0, -112, -112 };
        private void Form1_Load(object sender, EventArgs e)
        {
            InitialImage();
            InitialSurface();//初始化窗体界面
        }
        //添加图片
        private void InitialImage()
        {
            images[0] = Resources.保温杯;
            images[1] = Resources.体重秤;
            images[2] = Resources.x1;
            images[3] = Resources.台灯;
            images[4] = Resources.耳机;
            images[5] = Resources.x2;
            images[6] = Resources.电动牙刷;
            images[7] = Resources.时钟;
            this.BackgroundImage = Resources.formbg;
        }
        //初始化界面
        private void InitialSurface()
        {
            Panel pa = new Panel();
            pa.Size = new System.Drawing.Size(342, 348);
            pa.BackgroundImage = Resources.bga1;
            pa.BackgroundImageLayout = ImageLayout.Stretch;
            pa.Location = new Point(91, 316);
            pa.BackColor = Color.Transparent;
            pa.TabIndex = 0;
            this.Controls.Add(pa);
            int x = 11, y = 11;
            for (int i = 0; i < N; i++)
            {
                x += dx[i];
                y += dy[i];
                PictureBox box = new PictureBox();
                box.Size = new Size(95, 95);
                box.Location = new Point(x, y);
                box.Image = images[i];
                box.SizeMode = PictureBoxSizeMode.StretchImage;
                box.BorderStyle = BorderStyle.FixedSingle;
                box.Padding = new Padding(4);
                box.BackColor = Color.White;
                pictures[i] = box;
                pa.Controls.Add(box);
            }
            button.Text = "开始" + "
" + "抽奖";
            button.Font = new Font("宋体", 14, FontStyle.Bold);
            button.Size = new Size(97, 97);
            button.Location = new Point(123, 124);
            button.Click += Button_Click;
            pa.Controls.Add(button);

            PictureBox box1 = new PictureBox();
            box1.Image = Resources.bgGIF;
            box1.SizeMode = PictureBoxSizeMode.StretchImage;
            box1.BorderStyle = BorderStyle.None;
            box1.Size = new Size(395, 400);
            box1.Location = new Point(64, 290);
            this.Controls.Add(box1);
            this.MaximizeBox = false;
            this.BackgroundImageLayout = ImageLayout.Stretch;
            this.AutoSizeMode = AutoSizeMode.GrowAndShrink;
        } 
        #endregion

界面效果如下：

实现旋转是使用的改变控件大小，背景颜色(把padding设置4可以看见背景颜色)。

Random random = new Random();
        SoundPlayer sp = new SoundPlayer(Resources.Untitled_Project);
        int circle;
        int index;
        int stopNum;
        bool flag = true;//奇数和偶数的标志，为true表示偶数
        private void Button_Click(object sender, EventArgs e)
        {
            circle = random.Next(5, 8);//随机产生旋转的圈数
            stopNum = random.Next(0, 8);//随机确定选择抽中奖品的下标
            button.Enabled = false;
            time.Interval = 10;
            index = 0;
            flag = true;
            sp.Play();
            time.Start();
        }

        private void time_Tick(object sender, EventArgs e)
        {
            if (flag)//放大picturebox，实现转动效果
            {
                pictures[index].Size = new Size(103, 103);
                pictures[index].BackColor = Color.YellowGreen;
                flag = false;
            }
            else if (flag == false)//将原来的picturebox缩放回原来的尺寸
            {
                pictures[index].Size = new Size(95, 95);
                pictures[index].BackColor = Color.White;
                index++;
                flag = true;
            }
            if (index == 8)
            {
                index = 0;
                circle -= circle > 0 ? 1 : 0;//每次转动8次，旋转的圈数-1
            }
            //倒数两圈慢
            time.Interval = circle > 2 ? 10 : 100;
            if (circle == 0 && index == stopNum)
            {
                pictures[index].Size = new Size(103, 103);
                pictures[index].BackColor = Color.YellowGreen;
                pictures[index].Location = new Point(pictures[index].Location.X - 4, pictures[index].Location.Y - 4);
                StopRotate(index);
                pictures[index].Size = new Size(95, 95);
                pictures[index].BackColor = Color.White;
                pictures[index].Location = new Point(pictures[index].Location.X + 4, pictures[index].Location.Y + 4);
            }
        }

停止再加上一个简单的概率会有点不了不流畅。

 private void StopRotate(int sum)
        {
            string message = null;
            switch (index)
            {
                case 0: if (random.Next(0, 2) == stopNum) message = "恭喜获取保温杯一个"; else { circle = 1; stopNum = 2; } break;//1/2  14  7%
                case 1: if (random.Next(0, 3) == stopNum) message = "恭喜获取体重秤一个"; else { circle = 1; stopNum = 5; } break;//1/3  21  4%
                case 2: message = "谢谢惠顾"; break;
                case 3: if (random.Next(3, 7) == stopNum) message = "恭喜获取台灯一个"; else { circle = 1; stopNum = 5; } break;//1/4   28   3%
                case 4: if (random.Next(0, 5) == stopNum) message = "恭喜获取耳机一个"; else { circle = 1; stopNum = 5; } break;//1/4  28   3%
                case 5: message = "谢谢惠顾"; break;
                case 6: if (random.Next(6, 8) == stopNum) message = "恭喜获取电动牙刷一个"; else { circle = 1; stopNum = 2; } break;//1/2  1/14   7&
                case 7: if (random.Next(7, 10) == stopNum) message = "恭喜获取时钟一个"; else { circle = 1; stopNum = 2; } break;//1/3   1/21    4%
            }
            if (message != null)
            {
                sp.Stop();
                time.Stop();//先关闭定时器
                MessageBox.Show(message);
                this.button.Enabled = true;
            }
        }

简单的旋转程序就完成了。