C#拼图小程序Panel尺寸异常

Question

C#课上的一个拼图小程序，素材imageList设置的是80，80；标签也都是80，80尺寸，panel控件设置size = 240，240.执行出来的画面却放不下素材，改成320，300刚刚好，怎磨回事？是因为我电脑分辨率的问题吗？
代码如下：

namespace 拼图
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Label[,] arrlbl = new Label[3, 3];
        int unrow = 0, uncol = 0;
        bool playing = false;
        private void Form1_Load(object sender, EventArgs e)
        {
            this.SuspendLayout();
            //添加,设计标签控件
            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    Label lbl = new Label();
                    lbl.Text = "";
                    lbl.AutoSize = false;
                    lbl.Size = new Size(80,80);
                    lbl.Location = new Point(j*80,i*80);
                    lbl.ImageList = imageList1;
                    lbl.Click += new System.EventHandler(this.lblPic_Click);
                    panel1.Controls.Add(lbl);
                    arrlbl[i, j] = lbl;
                }
            }
            this.ResumeLayout();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            arrlbl[unrow, uncol].Visible = true;
            int[] arrnum = { 0, 1, 2, 3, 4, 5, 6, 7, 8 };
            Random rm = new Random();
            //打乱数组
            for (int i = 0; i < 8; i++)
            {
                int rmNum = rm.Next(1, 9);
                int temp = arrnum[i];
                arrnum[i] = arrnum[rmNum];
                arrnum[rmNum] = temp;
            }
            //为标签设置随机图片
            for (int i = 0; i < 9; i++)
            {
                arrlbl[i / 3, i % 3].ImageIndex = arrnum[i];
                arrlbl[i / 3, i % 3].BorderStyle = BorderStyle.FixedSingle;
            }
            //随机设置一张图片隐藏
            int cover = rm.Next(0, 9);
            unrow = cover / 3;
            uncol = cover / 3;
            arrlbl[unrow, uncol].Visible = false;
            playing = true;
        }
        private void lblPic_Click(object sender, EventArgs e)
        {
            if (!playing)
            {
                return;
            }
            //不懂
            int row = ((Label)sender).Top / 80;
            int col = ((Label)sender).Left / 80;
            //判断是否可以移动
            //单击标签与隐藏标签图片互换
            if (Math.Abs(col - uncol) + Math.Abs(row - unrow) == 1)
            {
                int temp = arrlbl[unrow, uncol].ImageIndex;
                arrlbl[unrow, uncol].ImageIndex = arrlbl[row, col].ImageIndex;
                arrlbl[row, col].ImageIndex = temp;
                arrlbl[unrow, uncol].Visible = true;
                arrlbl[row, col].Visible = false;
                unrow = row;
                uncol = col;
            }
            for (int i = 0; i < 9; i++)
            {
                if (arrlbl[i / 3, i % 3].ImageIndex != i)
                {
                    break;
                }
                if (i == 8)
                {
                    arrlbl[unrow, uncol].Visible = true;
                    foreach (Label lbl in arrlbl)
                    {
                        lbl.BorderStyle = BorderStyle.None;
                    }
                    playing = false;
                    MessageBox.Show("恭喜过关！", "拼图", MessageBoxButtons.OK, MessageBoxIcon.Information);
                }
            }
        }
    }
}

运行结果如下：

Answer 1

说明你的panel 容器 有padding