C＃键侦听

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我正在构建一个数独游戏，我想听一个数字键并将其应用于当前选择的多维数据集。 但是，由于某些原因，按键不起作用。

我的代码：

 namespace SodukoApp
    {
    public partial class SudokuFrame : UserControl
    {
        // Data
        private const int buttonWidth = 34;
        private const int buttonHeight = 34;
        private const int spaceBetweenButtons = 5;
        private const int rowAmount = 9;
        private const int colAmount = 9;
        private List<List<Button>> buttons;
        private int numOfZeroes;
        private int[,] currBoard;
        private bool haveSolution;
        private Button pressed;

        public SudokuFrame()
        {
            this.buttons = new List<List<Button>>();
            this.numOfZeroes = 62;
            InitializeComponent();
        }

        private void SudokuFrame_Load(object sender, EventArgs e)
        {
            this.difficulty.SelectedIndex = 0;
            this.buildABoard();
            this.generateBoardAndPrindToScreen();
        }

        public void SudokuFrame_KeyPress(object sender, KeyPressEventArgs e)
        {
            System.Console.WriteLine("somthing");
        }

        private void gameBoardButton_Click(object sender, EventArgs e)
        {
            if(this.pressed != null)
                this.pressed.FlatAppearance.BorderSize = 0;
            this.pressed = (Button)sender;
            this.pressed.FlatAppearance.BorderSize = 1;
        }
    }