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井字棋游戏平局提示重复弹出8次问题求助

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DevOps 小满
2026-8-24
井字棋应用平局提示重复弹出问题求助

我开发了一款tic-tac-toe（井字棋）应用，整体功能正常，但存在一个问题：当游戏出现平局时，平局提示框会重复弹出8次。我参考的教程未提及该问题，无法自行修复，现附上相关C#代码，希望得到帮助：

public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
    }
    string[] table = new string[9];
    int countTurn = 0;
    public String returnSymbol(int turn)
    {
        if (turn % 2 == 0)
        {
            return "O";
        }
        else
            return "X";
    }
    public System.Drawing.Color determineColor(string symbol)
    {
        if(symbol.Equals("X"))
        {
            return System.Drawing.Color.LawnGreen;
        }
        else
        {
            return System.Drawing.Color.Aqua;
        }
    }
    public void CheckDraw()
    {
        int count = 0;
        for (int i = 0; i < table.Length; i++)
        {
            if (table[i] != null)
                count++;


            if (count == 9)
            {
                MessageBox.Show("That's a draw!", "We have no winner :(", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);

            }
        }
    }
    public void checkForWinner()
    {
        for(int i=0;i<8; i++)
        {
            string combination = "";
            int one=0, two=0, three = 0;
            switch(i)
            {
                case 0:
                    combination = table[0] + table[4] + table[8];
                    one = 0;
                    two = 4;
                    three = 8;
                    break;
                case 1:
                    combination = table[2] + table[4] + table[6];
                    one = 2;
                    two = 4;
                    three = 6;
                    break;
                case 2:
                    combination = table[0] + table[1] + table[2];
                    one = 0;
                    two = 1;
                    three = 2;
                    break;
                case 3:
                    combination = table[3] + table[4] + table[5];
                    one = 3;
                    two = 4;
                    three = 5;
                    break;
                case 4:
                    combination = table[6] + table[7] + table[8];
                    one = 6;
                    two = 7;
                    three = 8;
                    break;
                case 5:
                    combination = table[0] + table[3] + table[6];
                    one = 0;
                    two = 3;
                    three = 6;
                    break;
                case 6:
                    combination = table[1] + table[4] + table[7];
                    one = 1;
                    two = 4;
                    three = 7;
                    break;
                case 7:
                    combination = table[2] + table[5] + table[8];
                    one = 2;
                    two = 5;
                    three = 8;
                    break;
            }
            if(combination.Equals("OOO"))
            {
                changeColor(one);
                changeColor(two);
                changeColor(three);
                MessageBox.Show("O has won the game!", "We have a winner!", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }
            else
                if(combination.Equals("XXX"))
            {
                changeColor(one);
                changeColor(two);
                changeColor(three);
                MessageBox.Show("X has won the game!", "We have a winner!", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            }
            else
            {
                CheckDraw();
            }
        }
    }
    public void reset()
    {
        button1.Text = "";
        button2.Text = "";
        button3.Text = "";
        button4.Text = "";
        button5.Text = "";
        button6.Text = "";
        button7.Text = "";
        button8.Text = "";
        button9.Text = "";
        button1.BackColor=System.Drawing.Color.White;
        button2.BackColor=System.Drawing.Color.White;
        button3.BackColor=System.Drawing.Color.White;
        button4.BackColor=System.Drawing.Color.White;
        button5.BackColor=System.Drawing.Color.White;
        button6.BackColor=System.Drawing.Color.White;
        button7.BackColor=System.Drawing.Color.White;
        button8.BackColor=System.Drawing.Color.White;
        button9.BackColor=System.Drawing.Color.White;
        countTurn = 0;
        table = new string[9];
    }
    public void changeColor(int number)
    {
        switch(number){
            case 0:
                button1.BackColor = System.Drawing.Color.OrangeRed;
                break;
            case 1:
                button2.BackColor = System.Drawing.Color.OrangeRed;
                break;
            case 2:
                button3.BackColor = System.Drawing.Color.OrangeRed;
                break;
            case 3:
                button4.BackColor = System.Drawing.Color.OrangeRed;
                break;
            case 4:
                button5.BackColor= System.Drawing.Color.OrangeRed;
                break;
            case 5:
                button6.BackColor = System.Drawing.Color.OrangeRed;
                break;
            case 6:
                button7.BackColor = System.Drawing.Color.OrangeRed;
                break;
            case 7:
                button8.BackColor = System.Drawing.Color.OrangeRed;
                break;
            case 8:
                button9.BackColor = System.Drawing.Color.OrangeRed;
                break;
        }
    }

    private void button1_Click(object sender, EventArgs e)
    {
        countTurn++;
        table[0]=returnSymbol(countTurn);
        button1.BackColor = determineColor(table[0]);
        button1.Text = table[0];
        checkForWinner();
    }

    private void button2_Click(object sender, EventArgs e)
    {
        countTurn++;
        table[1] = returnSymbol(countTurn);
        button2.BackColor = determineColor(table[1]);
        button2.Text = table[1];
        checkForWinner();
    }

    private void button3_Click(object sender, EventArgs e)
    {
        countTurn++;
        table[2] = returnSymbol(countTurn);
        button3.BackColor = determineColor(table[2]);
        button3.Text = table[2];
        checkForWinner();
    }

    private void button4_Click(object sender, EventArgs e)
    {
        countTurn++;
        table[3] = returnSymbol(countTurn);
        button4.BackColor = determineColor(table[3]);
        button4.Text = table[3];
        checkForWinner();
    }

    private void button5_Click(object sender, EventArgs e)
    {
        countTurn++;
        table[4] = returnSymbol(countTurn);
        button5.BackColor = determineColor(table[4]);
        button5.Text = table[4];
        checkForWinner();
    }

    private void button6_Click(object sender, EventArgs e)
    {
        countTurn++;
        table[5] = returnSymbol(countTurn);
        button6.BackColor = determineColor(table[5]);
        button6.Text = table[5];
        checkForWinner();
    }

    private void button7_Click(object sender, EventArgs e)
    {
        countTurn++;
        table[6] = returnSymbol(countTurn);
        button7.BackColor = determineColor(table[6]);
        button7.Text = table[6];
        checkForWinner();
    }

    private void button8_Click(object sender, EventArgs e)
    {
        countTurn++;
        table[7] = returnSymbol(countTurn);
        button8.BackColor = determineColor(table[7]);
        button8.Text = table[7];
        checkForWinner();
    }

    private void button9_Click(object sender, EventArgs e)
    {
        countTurn++;
        table[8] = returnSymbol(countTurn);
        button9.BackColor = determineColor(table[8]);
        button9.Text = table[8];
        checkForWinner();
    }

    private void TryAgainBtn_Click(object sender, EventArgs e)
    {
        reset();
    }
}

问题原因

  1. checkForWinner方法会遍历8种获胜组合，每次循环如果当前组合不是获胜情况，就会调用CheckDraw，平局时会触发8次调用，导致提示框弹8次。
  2. CheckDraw方法的判断逻辑错误，在遍历格子的循环内部每次都检查count == 9，会重复触发提示。

修复代码

1. 修正CheckDraw方法

public void CheckDraw()
{
    int count = 0;
    for (int i = 0; i < table.Length; i++)
    {
        if (table[i] != null)
            count++;
    }
    // 遍历完所有格子后再判断是否平局
    if (count == 9)
    {
        MessageBox.Show("平局！", "没有获胜者 :(", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
        // 可选：禁用所有按钮防止继续操作
        DisableAllButtons();
    }
}

2. 修正checkForWinner方法

public void checkForWinner()
{
    bool hasWinner = false;
    for(int i=0;i<8; i++)
    {
        string combination = "";
        int one=0, two=0, three = 0;
        switch(i)
        {
            case 0:
                combination = table[0] + table[4] + table[8];
                one = 0;
                two = 4;
                three = 8;
                break;
            case 1:
                combination = table[2] + table[4] + table[6];
                one = 2;
                two = 4;
                three = 6;
                break;
            case 2:
                combination = table[0] + table[1] + table[2];
                one = 0;
                two = 1;
                three = 2;
                break;
            case 3:
                combination = table[3] + table[4] + table[5];
                one = 3;
                two = 4;
                three = 5;
                break;
            case 4:
                combination = table[6] + table[7] + table[8];
                one = 6;
                two = 7;
                three = 8;
                break;
            case 5:
                combination = table[0] + table[3] + table[6];
                one = 0;
                two = 3;
                three = 6;
                break;
            case 6:
                combination = table[1] + table[4] + table[7];
                one = 1;
                two = 4;
                three = 7;
                break;
            case 7:
                combination = table[2] + table[5] + table[8];
                one = 2;
                two = 5;
                three = 8;
                break;
        }
        if(combination.Equals("OOO"))
        {
            changeColor(one);
            changeColor(two);
            changeColor(three);
            MessageBox.Show("O获胜！", "我们有赢家了！", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            hasWinner = true;
            DisableAllButtons();
            break; // 找到胜者后立即退出循环
        }
        else if(combination.Equals("XXX"))
        {
            changeColor(one);
            changeColor(two);
            changeColor(three);
            MessageBox.Show("X获胜！", "我们有赢家了！", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
            hasWinner = true;
            DisableAllButtons();
            break; // 找到胜者后立即退出循环
        }
    }
    // 所有组合检查完毕，没有胜者才判断平局
    if (!hasWinner)
    {
        CheckDraw();
    }
}

3. 添加辅助方法优化体验

// 禁用所有按钮，防止游戏结束后继续点击
private void DisableAllButtons()
{
    button1.Enabled = false;
    button2.Enabled = false;
    button3.Enabled = false;
    button4.Enabled = false;
    button5.Enabled = false;
    button6.Enabled = false;
    button7.Enabled = false;
    button8.Enabled = false;
    button9.Enabled = false;
}

// 在reset方法中恢复按钮可用状态
public void reset()
{
    button1.Text = "";
    button2.Text = "";
    button3.Text = "";
    button4.Text = "";
    button5.Text = "";
    button6.Text = "";
    button7.Text = "";
    button8.Text = "";
    button9.Text = "";
    button1.BackColor=System.Drawing.Color.White;
    button2.BackColor=System.Drawing.Color.White;
    button3.BackColor=System.Drawing.Color.White;
    button4.BackColor=System.Drawing.Color.White;
    button5.BackColor=System.Drawing.Color.White;
    button6.BackColor=System.Drawing.Color.White;
    button7.BackColor=System.Drawing.Color.White;
    button8.BackColor=System.Drawing.Color.White;
    button9.BackColor=System.Drawing.Color.White;
    // 恢复按钮可用
    button1.Enabled = true;
    button2.Enabled = true;
    button3.Enabled = true;
    button4.Enabled = true;
    button5.Enabled = true;
    button6.Enabled = true;
    button7.Enabled = true;
    button8.Enabled = true;
    button9.Enabled = true;
    countTurn = 0;
    table = new string[9];
}

内容的提问来源于stack exchange，提问作者Rares Petrescu

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最近更新时间：2026.08.24 06:48:09