c# - 程序立即执行下一个任务

Question

如果播放器达到第 2 级，则它会立即尝试“if level == 2”。我应该改变什么？如果您升级了，那么您只需单击“确定”，就不会弹出任何内容。现在，如果您升级了，如果您在“升级”消息框文本上单击“确定”，它将尝试再次升级您。

private void button4_Click(object sender, EventArgs e)
    {
        if (gold > 249)
        {
            gold -= 250;
            label3.Text = "Gold: " + gold.ToString();
            level++;
            label4.Text = "Level: " + level.ToString();
            MessageBox.Show(levelup);
        }
        else
        {
            int needed = 250;
            MessageBox.Show("Not enough to level up! You need: " + needed + " Gold");
        }
        if (level == 2)
        {
            button4.Text = "Level Up! (350 Gold)";
            if (gold > 349)
            {
                gold -= 350;
                label3.Text = "Gold: " + gold.ToString();
                level++;
                label4.Text = "Level: " + level.ToString();
                MessageBox.Show(levelup);
            }
            else
            {
                int needed = 350;
                MessageBox.Show("Not enough to level up! You need: " + needed + " Gold");
            }
        }
    }

Answer 1

您可以通过先检查最高等级然后再降低来修复它。
在第二部分，我还添加了“if (level == 1)”，否则如果金币多于 249，它总是会触发。“所以最好也检查一下 lvl”

private void button4_Click(object sender, EventArgs e)
{

    if (level == 2)
    {
        button4.Text = "Level Up! (350 Gold)";
        if (gold > 349)
        {
            gold -= 350;
            label3.Text = "Gold: " + gold.ToString();
            level++;
            label4.Text = "Level: " + level.ToString();
            MessageBox.Show(levelup);
        }
        else
        {
            int needed = 350;
            MessageBox.Show("Not enough to level up! You need: " + needed + " Gold");
        }
    }

    else if (level == 1)
    {
        if (gold > 249)
        {
            gold -= 250;
            label3.Text = "Gold: " + gold.ToString();
            level++;
            label4.Text = "Level: " + level.ToString();
            MessageBox.Show(levelup);
        }
        else
        {
            int needed = 250;
            MessageBox.Show("Not enough to level up! You need: " + needed + " Gold");
        }
    }
}