如何确定控件属于EventHandler中的哪个类

Question

这是我的类，我有各种属性和面板控件:

public class Square
{
    private Panel _pSquare;
    public Panel PSquare
    {
        get { return _pSquare; }
        set { _pSquare = value; }
    }
    ....

这是Form Load EventHandler，其中创建了一堆正方形对象:

private void Form1_Load(object sender, EventArgs e)
{
    for (var n = 0; n < gridSize; n++)
    {
        for (var m = 0; m < gridSize; m++)
        {
            Square squareboard = new Square(n, m);
            squareboard.PSquare.Click += squareEvent;
             ...

当用户点击面板时，pSquare_Click EventHandler被调用，因此该部分工作。

private void pSquare_Click(object sender, EventArgs e)
{

我的问题是:如何在这个EventHandler中访问类Square的属性?

Answer 1

无论何时创建面板，使用panel.Tag将每个面板与其正方形链接:

private void Form1_Load(object sender, EventArgs e)
{
    for (var n = 0; n < gridSize; n++)
    {
        for (var m = 0; m < gridSize; m++)
        {
            Square squareboard = new Square(n, m);
            squaredboard.PSquare.Tag = squareboard;
            squareboard.PSquare.Click += squareEvent;
            ...
private void pSquare_Click(object sender, EventArgs e)
{
    Panel panel = (Panel)sender;
    Square square = (Square)panel.Tag;//access to the underlying square object
}

Answer 2

你的Square类可以像这样:

public class Square
{
    private readonly Panel _pSquare;
    public Square(Panel pSquare)
    {
        this._pSquare = pSquare;
        this._pSquare.Click += this._pSquare_Click;
    }
    void _pSquare_Click(object sender, EventArgs e)
    {
        this.onSquareClicked();
    }
    public event EventHandler SquareClicked;
    private void onSquareClicked()
    {
        EventHandler eventHandler = this.SquareClicked;
        if (eventHandler != null)
        {
            eventHandler(this, EventArgs.Empty);
        }
    }
}

在您的表单中，您可以先制作面板，然后通过循环面板生成一个正方形集合:

    foreach (Panel panel in this.Controls.OfType<Panel>())
    {
        var square = new Square(panel);
        square.SquareClicked += this.squareClicked;
    }