using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;namespace WindowsFormsApplication15{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        const int N = 4;//按钮的行、列数        Button[,] buttons = new Button[N, N];//按钮的数组        private void Form1_Load(object sender, EventArgs e)        {            //产生所有按钮            GenerateAllButtons();        }        private void button1_Click(object sender, EventArgs e)        {            //点击“开始”按钮，打乱顺序            Shuffle();        }        //打乱顺序函数        void Shuffle()        {            //多次随机交换两个按钮            Random rnd = new Random();            for(int i = 0; i < 100; i++)            {                int a = rnd.Next(N);                int b = rnd.Next(N);                int c = rnd.Next(N);                int d = rnd.Next(N);                Swap(buttons[a, b], buttons[c, d]);//交换两个按钮位置            }        }        //生成所有按钮函数        void GenerateAllButtons()        {            int x0 = 100, y0 = 10, w = 45, d = 50;            for (int r = 0; r < N; r++)            {                for (int c = 0; c < N; c++)                {                    int num = r * N + c;                    Button btn = new Button();                    btn.Text = (num + 1).ToString();//设置按钮显示的数字                    btn.Top = y0 + r * d;//设置按钮的左边缘与容器的上边缘之间的距离                    btn.Left = x0 + c * d;//设置按钮的左边缘与容器的左边缘之间的距离                    btn.Width = w;//按钮宽度                    btn.Height = w;//按钮高度                    btn.Visible = true;//是否显示按钮                    btn.Tag = r * N + c;//Tag属性是给程序员自己用的，做点标记，类似于按钮的ID，此处这个数据用来表示它所在的行列位置                    //注册事件                    btn.Click += new EventHandler(btn_click);                    buttons[r, c] = btn;//放到数组中                    this.Controls.Add(btn);//加到界面上                }            }            buttons[N - 1, N - 1].Visible = false;//定义最后一个按钮不可见        }        //交换两个按钮函数        void Swap(Button btna,Button btnb)        {            //两个按钮的值交换            string t = btna.Text;            btna.Text = btnb.Text;            btnb.Text = t;            //两个按钮的可见属性交换            bool v = btna.Visible;            btna.Visible = btnb.Visible;            btnb.Visible = v;        }        //按钮点击事件处理        void btn_click(object sender,EventArgs e)        {            Button btn = sender as Button;//当前点中的按钮            Button blank = FindHiddenButton();//空白按钮            //判断是否与空白按钮相邻，如果是，则交换            if (IsNeighbor(btn,blank))            {                Swap(btn, blank);                blank.Focus();            }            //判断是否完成了游戏            if (ResultIsOk())            {                MessageBox.Show("OK");            }        }        //查找要隐藏的按钮函数        Button FindHiddenButton()        {            for (int r = 0; r < N; r++)            {                for (int c = 0; c < N; c++)                {                    if (!buttons[r,c].Visible)                    {                        return buttons[r, c];                    }                }            }            return null;        }        //判断是否相邻函数        bool IsNeighbor(Button btnA,Button btnB)        {            int a = (int)btnA.Tag;//获取Tag中保存的位置信息(0-15的值)            int b = (int)btnB.Tag;            int r1 = a / N, c1 = a % N;//算出第几行第几列            int r2 = b / N, c2 = b % N;                        //判断左右相邻或者上下相邻            if ( (r1 == r2 && (c1 == c2 - 1 || c1 == c2 + 1)) || (c1 == c2 && (r1 == r2 - 1 || r1 == r2 + 1)) )            {                return true;            }            return false;                     }        //检查是否完成        bool ResultIsOk()        {            for (int r = 0; r < N; r++)            {                for (int c = 0; c < N; c++)                {                    if(buttons[r,c].Text != (r * N + c + 1).ToString())                    {                        return false;                    }                }            }            return true;        }        private void Btn_Click(object sender, EventArgs e)        {            throw new NotImplementedException();        }    }}