Sudoku

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 すくド
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private Label select = new Label();
        private Label[,] arraysH , SqrtArrays;
        private Boolean switcherH = true, switcherL = true, BigSqrtCheck = true;
        private void Form1_Load(object sender, EventArgs e)
        {
            arraysH = new Label[9, 9] {{ label1, label2, label3,label18,label17,label16,label27,label26,label25},
                                       { label7, label6, label5,label15,label14,label13,label24,label23,label22},
                                       { label9, label8, label4,label12,label11,label10,label21,label20,label19},
                                       { label36,label35,label34,label45,label44,label43,label54,label53,label52},
                                       { label33,label32,label31,label42,label41,label40,label51,label50,label49},
                                       { label30,label29,label28,label39,label38,label37,label48,label47,label46},
                                       { label63,label62,label61,label72,label71,label70,label81,label80,label79},
                                       { label60,label59,label58,label69,label68,label67,label78,label77,label76},
                                       { label57,label56,label55,label66,label65,label64,label75,label74,label73}};
            SqrtArrays = new Label[9, 9] {{ label1, label2, label3, label7, label6, label5, label9, label8, label4},
                                          { label8, label7, label6,label15,label14,label13,label12,label11,label10},
                                          {label27,label26,label25,label24,label23,label22,label21,label20,label19},
                                          {label36,label35,label34,label33,label32,label31,label30,label29,label28},
                                          {label45,label44,label43,label42,label41,label40,label39,label38,label37},
                                          {label54,label53,label52,label51,label50,label49,label48,label47,label46},
                                          {label63,label62,label61,label60,label59,label58,label57,label56,label55},
                                          {label72,label71,label70,label69,label68,label67,label66,label65,label64},
                                          {label81,label80,label79,label78,label77,label76,label75,label74,label73}};

            Button[] btm = new Button[9] { button1, button2, button3, button4, button5, button6, button7, button8, button9 };

            for (int i = 0; i < 9; i++)
            {
                for (int j = 0; j < 9; j++)
                {
                    arraysH[i, j].Click += new EventHandler(labelClick);

                    arraysH[i, j].Tag = String.Format("{0},{1}", i, j);

                }
            }

            for (int i = 0; i < 9; i++)
            {
                btm[i].Click += new EventHandler(Button_Click);
            }
        }

        private void label1_Click(object sender, EventArgs e)
        {


        }

        private void Button_Click(object sender, EventArgs e)
        {
            Button btn = (Button)sender;
            select.Text = btn.Text;
            select.Tag = "used";
        }
        private void labelClick(object sender, EventArgs e)
        {
            Label lbl = (Label)sender;
            select = lbl;
        }
        private void button11_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < 9; i++)
            {//橫向檢查
                if (switcherH == true)
                {
                    int[] check = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
                    for (int r = 0; r < 9; r++)
                    {
                        int x = Convert.ToInt16(arraysH[i, r].Text);
                        check[x - 1] = 0;
                    }
                    for (int r = 0; r < 9; r++)
                    {
                        if (check[r] != 0)
                        {
                            switcherH = false;
                            arraysH[i, r].BackColor = Color.Green;
                            break;
                        }
                        else
                        {
                            switcherH = true;
                        }
                    }
                }
            }
            for (int i = 0; i < 9; i++)
            {//直向檢查
                if (switcherL == true)
                {
                    int[] check = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
                    for (int r = 0; r < 9; r++)
                    {
                        int x = Convert.ToInt16(arraysH[r, i].Text);
                        check[x - 1] = 0;
                    }
                    for (int r = 0; r < 9; r++)
                    {
                        if (check[r] != 0)
                        {
                            switcherL = false;
                            arraysH[r, i].BackColor = Color.Yellow;
                            break;
                        }
                        else
                        {
                            switcherL = true;
                        }
                    }
                }
            }
            for (int i = 0; i < 9; i++)
            {//大格檢查
                int[] check = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
                for (int j = 0; j < 9; j++)
                {
                    int x = Convert.ToInt16(SqrtArrays[i, j].Text);
                    check[x - 1] = 0;
                }
                for (int r = 0; r < 9; r++)
                {
                    if (check[r] != 0)
                    {
                        BigSqrtCheck = false;
                        break;
                    }
                    else
                    {
                        BigSqrtCheck = true;
                    }
                }
            }
            if (BigSqrtCheck == true && switcherL == true && switcherH == true)
            {
                for (int i = 0; i < 9; i++)
                {
                    for (int j = 0; j < 9; j++)
                    {
                        arraysH[i, j].BackColor = Color.Gold;
                    }
                }
            }
            else
            {
                String WrongMessage = "";
                for (int i = 0; i < 9; i++)
                {
                    for (int j = 0; j < 9; j++)
                    {
                        label82.ForeColor = Color.Red;
                        label82.Text = "誤る";
                    }
                }
                if (BigSqrtCheck == false)
                {
                    WrongMessage += "✘-每一大格都必須要不同數字\n";
                }
                else
                {
                    WrongMessage += "✓-每一大格都必須要不同數字\n";
                }
                if (switcherH == false)
                {
                    WrongMessage += "✘-橫向的所有數字必須不同\n";
                }
                else
                {
                    WrongMessage += "✓-橫向的所有數字必須不同\n";
                }
                if (switcherL == false)
                {
                    WrongMessage += "✘-直向的所有數字必須不同\n";
                }
                else
                {
                    WrongMessage += "✓-直向的所有數字必須不同\n";
                }
                MessageBox.Show(WrongMessage);
            }
        }
        private Random random = new Random();
        int[,] answer = {{1,2,3,4,5,6,7,8,9},
                         {4,5,6,7,8,9,1,2,3},
                         {7,8,9,1,2,3,4,5,6},
                         {8,9,7,2,3,1,5,6,4},
                         {5,6,4,8,9,7,2,3,1},
                         {3,1,2,5,6,4,8,9,7},
                         {2,3,1,6,4,5,9,7,8},
                         {6,4,5,9,7,8,3,1,2},
                         {9,7,8,3,1,2,6,4,5}};
        private void button12_Click(object sender, EventArgs e)
        {
            for (int i = 0; i < 9; i++)
            {
                for (int j = 0; j < 9; j++)
                {
                    arraysH[i, j].Text = answer[i,j].ToString();
                }
            }
        }
    }
}