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我正在尝试在运行时绘制图片框,就像我可以直接从工具箱中所做的那样。也就是说,在鼠标位置设置位置,在我按住按钮并将其拖过表单时调整它的大小。我在代码中完成的所有工作。但是当我开始绘制第二个图片框时,第一个图片框消失了,我想继续向表单添加更多图片框,如果我删除MouseMove事件并向下移动PictureBox pb1 = new PictureBox();MouseDown事件,它可以让我添加更多按钮,但是我无法调整大小他们显然。

    int cellSize = 10;
    int numOfCells = 500;

    PictureBox pb1 = new PictureBox();
    int Mx, My;

    public Form1()
    {
        InitializeComponent();
        this.DoubleBuffered = true;
    }

    public void pictureBox1_MouseMove(object sender, MouseEventArgs e)
    {
        Point p = new Point(e.X, e.Y);
        Mx = p.X;
        My = p.Y;
        int xSnap = (Mx / cellSize) * cellSize;
        int ySnap = (My / cellSize) * cellSize;

        pb1.BackColor = (Color.Red);

        if (e.Button == MouseButtons.Left)
        {
            pb1.Size = new Size(xSnap - pb1.Left, ySnap - pb1.Top);
        }
    }

    private void pictureBox1_MouseDown(object sender, MouseEventArgs e)
    {
        Point p = new Point(e.X, e.Y);
        Mx = p.X;
        My = p.Y;
        int xSnap = (Mx / cellSize) * cellSize;
        int ySnap = (My / cellSize) * cellSize;

        pb1.Location = new Point(xSnap, ySnap);
        pictureBox1.Controls.Add(pb1);
    }
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1 回答 1

2

你总是重复使用同一个PictureBox实例。

每次要添加新实例时,您都需要创建一个新实例,方法是编写new PictureBox().

于 2012-11-06T15:37:58.023 回答