C# 实现数独游戏

1.数独单元

 public struct SudokuCell
    {
        public SudokuCell() : this(0, 0, 0)
        {
        }
        public SudokuCell(int x, int y, int number)
        {
            X = x; Y = y; Number = number;
        }
        public int X { get; set; }
        public int Y { get; set; }
        public int Number { get; set; }
    }

2.数独创建

public class SudokuGenerator
    {
        private const int BoardSize = 9;
        private const int EmptyCellValue = 0;

        private Random random;
        private readonly ChaosRandomEx chaosRandomEx;
        public SudokuGenerator()
        {
            random = new Random();
            chaosRandomEx = new ChaosRandomEx();
        }

        public SudokuCell[,] GenerateSudoku(DifficultyLevel difficulty)
        {
            SudokuCell[,] board = new SudokuCell[BoardSize, BoardSize];

            // 初始化数独网格
            for (int row = 0; row < BoardSize; row++)
            {
                for (int col = 0; col < BoardSize; col++)
                {
                    board[row, col] = new SudokuCell(row, col, EmptyCellValue);
                }
            }

            // 填充数独网格
            FillSudoku(board);

            // 根据难度要求移除部分单元格的值
            RemoveCells(board, difficulty);

            return board;
        }


        private void FillSudoku(SudokuCell[,] board)
        {
            SolveSudoku(board);
        }

        private bool SolveSudoku(SudokuCell[,] board)
        {
            int row = 0;
            int col = 0;

            if (!FindEmptyCell(board, ref row, ref col))
            {
                // 所有单元格都已填满，数独已解决
                return true;
            }

            List<int> numbers = GetRandomNumberSequence();

            foreach (int num in numbers)
            {
                if (IsValidMove(board, row, col, num))
                {
                    // 尝试填充数字
                    board[row, col].Number = num;

                    if (SolveSudoku(board))
                    {
                        // 递归解决剩余的单元格
                        return true;
                    }

                    // 回溯到上一个单元格
                    board[row, col].Number = EmptyCellValue;
                }
            }

            return false;
        }

        private bool FindEmptyCell(SudokuCell[,] board, ref int row, ref int col)
        {
            for (row = 0; row < BoardSize; row++)
            {
                for (col = 0; col < BoardSize; col++)
                {
                    if (board[row, col].Number == EmptyCellValue)
                    {
                        return true;
                    }
                }
            }

            return false;
        }

        public bool IsValidMove(SudokuCell[,] board, int row, int col, int num)
        {
            // 检查行是否合法
            for (int i = 0; i < BoardSize; i++)
            {
                if (board[i, col].Number == num)
                {
                    return false;
                }
            }

            // 检查列是否合法
            for (int i = 0; i < BoardSize; i++)
            {
                if (board[row, i].Number == num)
                {
                    return false;
                }
            }

            // 检查子网格是否合法
            int subgridRow = (row / 3) * 3;
            int subgridCol = (col / 3) * 3;

            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    if (board[subgridRow + i, subgridCol + j].Number == num)
                    {
                        return false;
                    }
                }
            }

            return true;
        }

        private List<int> GetRandomNumberSequence()
        {
            List<int> numbers = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
            Shuffle(numbers);
            return numbers;
        }

        private void Shuffle<T>(List<T> list)
        {
            int n = list.Count;
            while (n > 1)
            {
                n--;
                int k = random.Next(n + 1);
                T value = list[k];
                list[k] = list[n];
                list[n] = value;
            }
        }

        private void RemoveCells(SudokuCell[,] board, DifficultyLevel difficulty)
        {
            int cellsToRemove = GetCellsToRemoveCount(difficulty);

            for (int i = 0; i < cellsToRemove; i++)
            {
                int row = random.Next(BoardSize);
                int col = random.Next(BoardSize);

                if (board[row, col].Number != EmptyCellValue)
                {
                    board[row, col].Number = EmptyCellValue;
                }
                else
                {
                    i--;
                }
            }
        }

        private int GetCellsToRemoveCount(DifficultyLevel difficulty)
        {
            return difficulty switch
            {
                DifficultyLevel.Medium => 32,
                DifficultyLevel.Hard => 44,
                DifficultyLevel.VeryHard => 56,
                DifficultyLevel.SuperHard => 68,
                DifficultyLevel.Insane => 80,
                _ => 20
            };
        }
    }

3.数独难度等级

public enum DifficultyLevel
    {
        /// <summary>
        /// 简单
        /// </summary>
        [Remark("简单")]
        Easy,
        /// <summary>
        /// 中等
        /// </summary>
        [Remark("中等")]
        Medium,
        /// <summary>
        /// 困难
        /// </summary>
        [Remark("困难")]
        Hard,
        /// <summary>
        /// 极难
        /// </summary>
        [Remark("极难")]
        VeryHard,
        /// <summary>
        /// 超难
        /// </summary>
        [Remark("超难")]
        SuperHard,
        /// <summary>
        /// 疯狂
        /// </summary>
        [Remark("疯狂")]
        Insane
    }

4.递归回溯算法寻找答案

/// <summary>
    /// 递归回溯算法
    /// </summary>
    public class SudokuSolver
    {
        public SudokuCell[,] SolveSudoku(SudokuCell[,] board)
        {
            var solution = new SudokuCell[board.GetLength(0), board.GetLength(1)];
            Array.Copy(board, solution, board.Length);
            if (BacktrackSolve(solution))
            {
                return solution;
            }
            else
            {
                // 没有找到解
                return null;
            }
        }

        private bool BacktrackSolve(SudokuCell[,] board)
        {
            for (int row = 0; row < 9; row++)
            {
                for (int col = 0; col < 9; col++)
                {
                    if (board[row, col].Number == 0)
                    {
                        for (int num = 1; num <= 9; num++)
                        {
                            if (IsValid(board, row, col, num))
                            {
                                board[row, col].Number = num;

                                if (BacktrackSolve(board))
                                {
                                    return true;
                                }

                                board[row, col].Number = 0; // 回溯
                            }
                        }

                        return false; // 所有数字都尝试过，没有找到合适的解
                    }
                }
            }

            return true; // 数独已经填满，找到解
        }

        private bool IsValid(SudokuCell[,] board, int row, int col, int num)
        {
            // 检查同行是否有重复数字
            for (int i = 0; i < 9; i++)
            {
                if (board[row, i].Number == num)
                {
                    return false;
                }
            }

            // 检查同列是否有重复数字
            for (int i = 0; i < 9; i++)
            {
                if (board[i, col].Number == num)
                {
                    return false;
                }
            }

            // 检查同九宫格是否有重复数字
            int startRow = row - row % 3;
            int startCol = col - col % 3;
            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    if (board[startRow + i, startCol + j].Number == num)
                    {
                        return false;
                    }
                }
            }

            return true; // 没有重复数字
        }
    }

5.数独创建中心

public class SudokuCenter : IDisposable
    {
        public bool IsStart { get; set; } = false;
        private int _width;
        private int _height;
        public const int CELLSNUMBER = 9;
        public const int CELLSNUMBER2 = 20;
        private int _cellSize;
        private int _rowSize;
        public int CellSize=> _cellSize;
        public int RowSize => _rowSize;
        public int Height => _height;
        public int Width => _width;
        public int Padding => CELLSNUMBER2;
        private Bitmap _bitmap;
        public Bitmap GetBitmap
        {
            get=>(Bitmap)_bitmap?.Clone();
            private set => _bitmap = value;
        }
        public SudokuCell[,] Suduku { get;private set; }
        public SudokuCell[,] PlayerSuduku { get; private set; }
        /// <summary>
        /// 生成棋盘图
        /// </summary>
        /// <param name="w"></param>
        /// <param name="h"></param>
        public void InitCheckerBoard(int w, int h)
        {
            w -= (CELLSNUMBER2 * 2 + 1);
            h -= (CELLSNUMBER2 * 2 + 1);
            _width = w;
            _height = h;
            _cellSize = _width / CELLSNUMBER;
            _rowSize = _height / CELLSNUMBER;
            Bitmap bitmap = new Bitmap(_width + CELLSNUMBER2, _height + CELLSNUMBER2);
            using (var g = Graphics.FromImage(bitmap))
            {
                g.SmoothingMode = SmoothingMode.AntiAlias;
                //g.Clear(Color.Gray);
                DrawCheckerBoard(g);
            }
            _bitmap?.Dispose();
            GetBitmap = bitmap;
        }
        public SudokuCell[,] GenerateSudoku(DifficultyLevel difficulty)
        {
            SudokuGenerator sudokuGenerator = new SudokuGenerator();
            Suduku = sudokuGenerator.GenerateSudoku(difficulty);
            PlayerSuduku = new SudokuCell[Suduku.GetLength(0), Suduku.GetLength(1)];
            Array.Copy(Suduku, PlayerSuduku, Suduku.Length);
            return Suduku;
        }
        public Color SudukuColor { get; set; }= Color.Black;
        public Color SolutionColor { get; set; } = Color.Red;
        public Color TransparentColor { get; } = Color.Transparent;
        public Font Font { get; set; }= new Font("Arial", 20, FontStyle.Bold);

        public Bitmap DrawSolution(SudokuCell[,] board)
        {
            using SolidBrush brush = new SolidBrush(SolutionColor);
            using SolidBrush brush2 = new SolidBrush(SudukuColor);
            var bm = GetBitmap;
            using var g = Graphics.FromImage(bm);
            for (int row = 0; row < CELLSNUMBER; row++)
            {
                for (int col = 0; col < CELLSNUMBER; col++)
                {
                   
                    int number = Suduku[row, col].Number;
                    if (number != 0)
                    {
                        DrawString(g, row, col, number.ToString(), brush2);
                    }
                    else
                    {
                        number = board[row, col].Number;
                        DrawString(g, row, col, number.ToString(), brush);
                    }
                }
            }
            return bm;
        }
        public void DrawSudoku(Graphics g, SudokuCell[,] board)
        {
            using SolidBrush brush = new SolidBrush(SudukuColor);


            for (int row = 0; row < CELLSNUMBER; row++)
            {
                for (int col = 0; col < CELLSNUMBER; col++)
                {
                   int num= board[row, col].Number;
                    if((num != 0))
                    {
                        DrawString(g,row,col,num.ToString(), brush);
                    }
                }
            }
        }
        public void DrawString(Graphics g,int row,int col,string number, SolidBrush brush)
        {
            int x = CELLSNUMBER2 + col * _cellSize + _cellSize / 2 - 8;
            int y = CELLSNUMBER2 + row * _rowSize + _rowSize / 2 - 10;
            g.DrawString(number, Font, brush, new Point(x, y));
           
        }
        public Rectangle DrawTransparent(Graphics g, int row, int col)
        {
            int off = 5;
            int off2 = 7;
            int x = CELLSNUMBER2 + col * _cellSize + off;
            int y = CELLSNUMBER2 + row * _rowSize+ off;
            using (SolidBrush brush = new SolidBrush(Color.White)) // 使用透明色进行擦除
            {
                var rec = new Rectangle(x, y, CellSize - off2, RowSize - off2);
                g.FillRectangle(brush, rec);
                return rec;
            }
        }
        public bool IsSolutionCorrect(SudokuCell[,] board, SudokuCell[,] solution)
        {
            for (int row = 0; row < CELLSNUMBER; row++)
            {
                for (int col = 0; col < CELLSNUMBER; col++)
                {
                    if (board[row, col].Number != solution[row, col].Number)
                    {
                        return false;
                    }
                }
            }

            return true;
        }
        public bool IsValidMove(SudokuCell[,] board, int row, int col, int num)
        {
            // 检查行是否合法
            for (int i = 0; i < CELLSNUMBER; i++)
            {
                if (board[i, col].Number == num)
                {
                    return false;
                }
            }

            // 检查列是否合法
            for (int i = 0; i < CELLSNUMBER; i++)
            {
                if (board[row, i].Number == num)
                {
                    return false;
                }
            }

            // 检查子网格是否合法
            int subgridRow = (row / 3) * 3;
            int subgridCol = (col / 3) * 3;

            for (int i = 0; i < 3; i++)
            {
                for (int j = 0; j < 3; j++)
                {
                    if (board[subgridRow + i, subgridCol + j].Number == num)
                    {
                        return false;
                    }
                }
            }

            return true;
        }
        private void DrawCheckerBoard(Graphics g)
        {
            using Pen pen = new Pen(Color.Black, 1);
            using Pen pen2 = new Pen(Color.Black, 2);
            using Font font = new Font("Arial", 10, FontStyle.Regular);
            using SolidBrush brush = new SolidBrush(Color.Black);

            for (int i = 0; i < CELLSNUMBER + 1; i++)
            {
                if (i == 0 || i % 3 == 0)
                {
                    g.DrawLine(pen2, new Point(CELLSNUMBER2, CELLSNUMBER2 + i * _rowSize), new Point(CELLSNUMBER2 + _cellSize * CELLSNUMBER, CELLSNUMBER2 + i * _rowSize));
                    g.DrawLine(pen2, new Point(CELLSNUMBER2 + i * _cellSize, CELLSNUMBER2 + 0), new Point(CELLSNUMBER2 + i * _cellSize, CELLSNUMBER2 + _rowSize * CELLSNUMBER));
                }
                else
                {
                    g.DrawLine(pen, new Point(CELLSNUMBER2, CELLSNUMBER2 + i * _rowSize), new Point(CELLSNUMBER2 + _cellSize * CELLSNUMBER, CELLSNUMBER2 + i * _rowSize));
                    g.DrawLine(pen, new Point(CELLSNUMBER2 + i * _cellSize, CELLSNUMBER2 + 0), new Point(CELLSNUMBER2 + i * _cellSize, CELLSNUMBER2 + _rowSize * CELLSNUMBER));
                }


                int x = CELLSNUMBER2 + i * _cellSize + _cellSize / 2 - 5;
                int y = 0;
                g.DrawString((i + 1).ToString(), font, brush, new Point(x, y));

                x = 0;
                y = CELLSNUMBER2 + i * _rowSize + _rowSize / 2 - 5;
                g.DrawString((i + 1).ToString(), font, brush, new Point(x, y));
            }
        }

        public void Dispose()
        {
            _bitmap?.Dispose();
        }
    }

 6.数字键盘

 public partial class FrmNumber : Form
    {
        public FrmNumber()
        {
            InitializeComponent();

            foreach (Control item in this.Controls)
            {
                item.Click += Item_Click;
            }
        }
        public Action<NumberArg> NumberCallback;
        public Point ClickPoint {  get; set; }
        public Point RowCell { get; set; }
        public Graphics Graphics { get; set; }
        private void Item_Click(object? sender, EventArgs e)
        {
            Button btn = sender as Button;
            NumberArg numberArg = new NumberArg();
            if (btn.Name == "btnClear")
            {
                numberArg.Type = NumberType.Clear;

            }
            else if (btn.Name == "btnClose")
            {
                numberArg.Type = NumberType.Close;
            }
            else
            {
                numberArg.Type = NumberType.Number;
                numberArg.Value = btn.Text;
            }
            numberArg.CllickPoint = ClickPoint;
            numberArg.RowCell = RowCell;
            numberArg.Graphics = Graphics;
            NumberCallback?.Invoke(numberArg);
            this.Close();
        }

        private void FrmNumber_FormClosing(object sender, FormClosingEventArgs e)
        {
            this.Dispose();
        }
    }
    public struct NumberArg
    {
        public NumberType Type { get; set; }
        public string Value { get; set; }
        public Point CllickPoint { get; set; }
        public Graphics Graphics { get; set; }
        public Point RowCell { get; set; }
    }
    public enum NumberType
    {
        Clear,
        Close,
        Number
    }

7.主窗体 

public partial class FrmMain : Form
    {
        private SudokuCenter _sudokuCenter;
        private System.Windows.Forms.Timer _timer;
        public FrmMain()
        {
            InitializeComponent();
            this.SetStyle(ControlStyles.DoubleBuffer | ControlStyles.OptimizedDoubleBuffer |
              ControlStyles.UserPaint |
              ControlStyles.AllPaintingInWmPaint,
              true);
            this.UpdateStyles();
            this.DoubleBuffered = true;


            _sudokuCenter = new SudokuCenter();
            _sudokuCenter.InitCheckerBoard(this.pbGameBack.Width, this.pbGameBack.Height);
            BindType(typeof(DifficultyLevel), this.cbDifficultyLevel, "Easy");
        }
        private void BindType(Type type, ComboBox comboBox, string defaultValue)
        {
            var enumValues = Enum.GetValues(type);
            var list = new List<IdValues>();
            int index = 0, curIndex = 0;
            foreach (Enum value in enumValues)
            {
                int hc = value.GetHashCode();
                list.Add(new IdValues
                {
                    Id = hc.ToString(),
                    Value = value.ToString(),
                    Display= value.GetEnumDesc(),
                    Standby = hc
                });
                if (value.ToString() == defaultValue)
                    index = curIndex;

                curIndex++;
            }

            comboBox.ValueMember = "Id";
            comboBox.DisplayMember = "Display";
            comboBox.DataSource = list;
            comboBox.SelectedIndex = index;
        }
        private void pbGameBack_Paint(object sender, PaintEventArgs e)
        {
            if (sudukuBitmap != null)
            {
                e.Graphics.DrawImage(sudukuBitmap, 0, 0, pbGameBack.Width, pbGameBack.Height);
            }
        }
        public string Compute(long time)
        {
            if (time < 60)
                return $"00:{ChangeString(time)}";
            long minute = time / 60;
            if (minute < 60)
                return $"{ChangeString(minute)}:{ChangeString(time % 60)}";
            long hour = minute / 60;
            return $"{ChangeString(hour)}:{Compute(time - hour * 3600)}";
        }
        private string ChangeString(long val)
        {
            return val.ToString("D2");
        }

        /// <summary>
        /// 开始
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnStart_Click(object sender, EventArgs e)
        {
            StartGame();
        }
        Bitmap sudukuBitmap;
        private void StartGame()
        {
            if (_sudokuCenter.IsStart)
            {
                if (MessageBox.Show("你正在开始游戏，确认重新开始吗？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.Cancel)
                {
                    return;
                }
            }

            if (_timer != null)
            {
                _timer.Stop();
                _timer.Dispose();
            }

            time = 0;
            _timer = new System.Windows.Forms.Timer();
            _timer.Interval = 1000;
            _timer.Tick += timer_Tick;
            _timer.Start();

            DifficultyLevel level = (DifficultyLevel)(this.cbDifficultyLevel.Items[cbDifficultyLevel.SelectedIndex] as IdValues).Standby;
            var sudoku = _sudokuCenter.GenerateSudoku(level);
            this.pbGameBack.Image?.Dispose();
            sudukuBitmap?.Dispose();
            sudukuBitmap = null;
            sudukuBitmap = _sudokuCenter.GetBitmap;
            using var g = Graphics.FromImage(sudukuBitmap);
            _sudokuCenter.DrawSudoku(g, sudoku);
            _sudokuCenter.IsStart = true;

            pbGameBack.Invalidate();
        }
        long time = 0;
        private void timer_Tick(object? sender, EventArgs e)
        {
            lblTime.ExecBeginInvoke(() =>
            {
                lblTime.Text = Compute(++time);

            });
        }

        /// <summary>
        /// 答案
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSolution_Click(object sender, EventArgs e)
        {
            if (!_sudokuCenter.IsStart)
            {
                return;
            }
            if (MessageBox.Show("你正在开始游戏，确认显示答案吗？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.Cancel)
            {
                return;
            }
            SudokuSolver sudokuSolver = new SudokuSolver();
            var solveSudoku = sudokuSolver.SolveSudoku(_sudokuCenter.Suduku);
            var bm = _sudokuCenter.DrawSolution(solveSudoku);

            pbGameBack.Image?.Dispose();
            sudukuBitmap?.Dispose();
            sudukuBitmap = null;
            sudukuBitmap = bm;
            //pbGameBack.Image = bm;
            _sudokuCenter.IsStart = false;
            pbGameBack.Invalidate();
        }

        private void pbGameBack_MouseDown(object sender, MouseEventArgs e)
        {
            if (_sudokuCenter.Suduku == null || !_sudokuCenter.IsStart)
                return;

            int row = (e.Y - _sudokuCenter.Padding * 2) / _sudokuCenter.RowSize;
            int col = (e.X - _sudokuCenter.Padding * 2) / _sudokuCenter.CellSize;
            // 检测鼠标是否在小方格内
            if (row >= 0 && row < 9 && col >= 0 && col < 9)
            {
                var number = _sudokuCenter.Suduku[row, col].Number;
                if (number != 0)
                    return;

                using (FrmNumber fn = new FrmNumber())
                {
                    fn.NumberCallback = NumberCallback;
                    Point p = pbGameBack.PointToScreen(Point.Empty);
                    fn.StartPosition = FormStartPosition.Manual;

                    fn.Location = new Point(p.X + e.X + (_sudokuCenter.CellSize >> 1), p.Y + e.Y + (_sudokuCenter.RowSize >> 1));
                    fn.ClickPoint = new Point(e.X, e.Y);
                    fn.RowCell = new Point(row, col);
                    fn.ShowDialog();
                }
               

            }
        }
        private void NumberCallback(NumberArg arg)
        {
            switch (arg.Type)
            {
                case NumberType.Number:
                    DrawString(arg.RowCell.X, arg.RowCell.Y, arg.Value);
                    int num = Convert.ToInt32(arg.Value);
                    if (cbPrompt.Checked)
                    {
                        bool status = _sudokuCenter.IsValidMove(_sudokuCenter.PlayerSuduku, arg.RowCell.X, arg.RowCell.Y, num);
                        lblPrompt.Text = status ? "你真棒！" : "重复了";
                    }
                    else
                    {
                        lblPrompt.Text = "已写入";
                    }
                    _sudokuCenter.PlayerSuduku[arg.RowCell.X, arg.RowCell.Y].Number = num;
                    pbGameBack.Invalidate(new Rectangle(SudokuCenter.CELLSNUMBER2 + arg.RowCell.Y * _sudokuCenter.CellSize, SudokuCenter.CELLSNUMBER2 + arg.RowCell.X * _sudokuCenter.RowSize, SudokuCenter.CELLSNUMBER2 + _sudokuCenter.CellSize, SudokuCenter.CELLSNUMBER2 + _sudokuCenter.RowSize));

                    break;
                case NumberType.Clear:
                    using (var g = Graphics.FromImage(sudukuBitmap))
                    {
                        _sudokuCenter.PlayerSuduku[arg.RowCell.X, arg.RowCell.Y].Number = 0;
                        var rec= _sudokuCenter.DrawTransparent(g, arg.RowCell.X, arg.RowCell.Y);
                        lblPrompt.Text = "已清除";
                        pbGameBack.Invalidate(rec);
                    }
                    break;
            }
        }
        private void DrawString(int row, int col, string num)
        {
            using (var g = Graphics.FromImage(sudukuBitmap))
            {
                using SolidBrush brush = new SolidBrush(_sudokuCenter.SolutionColor);
                _sudokuCenter.DrawTransparent(g, row, col);
                _sudokuCenter.DrawString(g, row, col, num, brush);
            }
        }
        private void DrawString(Graphics g, int row, int col, string num)
        {
            using SolidBrush brush = new SolidBrush(_sudokuCenter.SolutionColor);
            _sudokuCenter.DrawTransparent(g, row, col);
            _sudokuCenter.DrawString(g, row, col, num, brush);
            pbGameBack.Invalidate(new Rectangle(SudokuCenter.CELLSNUMBER2 + col * _sudokuCenter.CellSize, SudokuCenter.CELLSNUMBER2 + row * _sudokuCenter.RowSize, _sudokuCenter.CellSize, _sudokuCenter.RowSize));
        }

        /// <summary>
        /// 提交
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnSubmit_Click(object sender, EventArgs e)
        {
            if (!_sudokuCenter.IsStart)
            {
                return;
            }
            if (MessageBox.Show("你正在开始游戏，确认提交答案吗？", "提示", MessageBoxButtons.OKCancel, MessageBoxIcon.Question) == DialogResult.Cancel)
            {
                return;
            }

            _timer.Stop();

            SudokuSolver sudokuSolver = new SudokuSolver();
            var solveSudoku = sudokuSolver.SolveSudoku(_sudokuCenter.Suduku);
            bool status = _sudokuCenter.IsSolutionCorrect(_sudokuCenter.PlayerSuduku, solveSudoku);
            if (status)
            {
                lblPrompt.Text = "全对了，你真棒！";
                MessageBox.Show("全对了，你真棒！", "恭喜");
            }
            else
            {
                lblPrompt.Text = "很遗憾，有错误！";
                MessageBox.Show("很遗憾，有错误！", "失败");
                for (int row = 0; row < SudokuCenter.CELLSNUMBER; row++)
                {
                    for (int col = 0; col < SudokuCenter.CELLSNUMBER; col++)
                    {
                        if (solveSudoku[row, col].Number != _sudokuCenter.PlayerSuduku[row, col].Number)
                        {
                            this.DrawString(row, col, solveSudoku[row, col].Number.ToString());
                        }
                    }
                }
                pbGameBack.Invalidate();
            }
            _sudokuCenter.IsStart = false;
        }
        /// <summary>
        /// 重新开始
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnRestart_Click(object sender, EventArgs e)
        {
            StartGame();
        }

        private void FrmMain_FormClosing(object sender, FormClosingEventArgs e)
        {
            _sudokuCenter.Dispose();
            this.pbGameBack.Image?.Dispose();
            this.pbGameBack.Dispose();

            if (_timer != null)
            {
                _timer.Stop();
                _timer.Dispose();
            }
            this.Dispose();
        }
    }

8.其它

 public class RemarkAttribute : Attribute
    {
        /// <summary>
        /// 备注
        /// </summary>
        public string Remark { get; set; }

        public RemarkAttribute(string remark)
        {
            this.Remark = remark;
        }
    }
    public static class EnumEx
    {
        /// <summary>
        /// 根据枚举元素,获取该枚举元素的描述信息
        /// </summary>
        /// <typeparam name="T"></typeparam>
        /// <param name="tField"></param>
        /// <returns></returns>
        public static string GetEnumDesc<T>(this T tField) where T : Enum
        {
            var description = string.Empty; //结果
            var inputType = tField.GetType(); //输入的类型
            var descType = typeof(RemarkAttribute); //目标查找的描述类型

            var fieldStr = tField.ToString();                //输入的字段字符串
            var field = inputType.GetField(fieldStr);        //目标字段

            var isDefined = field?.IsDefined(descType, false);//判断描述是否在字段的特性
            if (isDefined ?? false)
            {
                var enumAttributes = field.GetCustomAttributes(descType, false) as RemarkAttribute[];  //得到特性信息
                description = enumAttributes?.FirstOrDefault()?.Remark ?? string.Empty;
                //  description = string.Join(',', enumAttributes?.Select(t => t.Remark));
            }
            return description;
        }
    }

 public class IdValues
    {
        public string Id { get; set; }
        public string Value { get; set; }
        public string Value2 { get; set; }
        public string Value3 { get; set; }
        public string Value4 { get; set; }
        public string Value5 { get; set; }
        public int Standby { get; set; }
        public string Display { get; set; }
        public static bool operator ==(IdValues idValues, IdValues idValues2)
        {
            return idValues.Equals(idValues2);
        }
        public static bool operator !=(IdValues idValues, IdValues idValues2)
        {
            return !idValues.Equals(idValues2);
        }
        public override int GetHashCode()
        {
            var code = (Id, Value, Value2, Value3, Value4, Value5, Standby).GetHashCode();
            return code;
        }
        public override bool Equals(object? obj)
        {
            return obj?.GetHashCode() == GetHashCode();
        }
        const int TARGET = 0x1F;
        /// <summary>
        /// 将连续字段的哈希代码左移两位或更多位来加权各个哈希代码(最佳情况下，超出位 31 的位应环绕，而不是被丢弃)
        /// </summary>
        /// <param name="value"></param>
        /// <param name="positions"></param>
        /// <returns></returns>
        public int ShiftAndWrap(int value, int positions = 3)
        {
            positions &= TARGET;
            uint number = BitConverter.ToUInt32(BitConverter.GetBytes(value), 0);
            uint wrapped = number >> (32 - positions);
            return BitConverter.ToInt32(BitConverter.GetBytes((number << positions) | wrapped), 0);
        }
    }

 

 internal static class SystemEx
    {
        /// <summary>
        /// 跨线程操作控件
        /// </summary>
        /// <param name="con"></param>
        /// <param name="action"></param>
        public static void ExecBeginInvoke(this Control con, Action action)
        {
            if (action == null) return;
            if (con.InvokeRequired)
            {
                con.BeginInvoke(new Action(action));
            }
            else
            {
                action();
            }
        }
        /// <summary>
        /// 跨线程操作控件
        /// </summary>
        /// <param name="con"></param>
        /// <param name="action"></param>
        public static void ExecInvoke(this Control con, Action action)
        {
            if (action == null) return;
            if (con.InvokeRequired)
            {
                con.Invoke(new Action(action));
            }
            else
            {
                action();
            }
        }
    }

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