在PictureBox上绘制网格

Question

我目前正在使用pictureBox.我很难在图片框上画一个大约2 x 2正方形的网格.现在,下面的代码只给我一条画线.我怎样才能在pictureBox上绘制一个完整的网格？

码:

private Graphics g1;

    public Form1()
    {
        InitializeComponent();


        pictureBox1.Image = new Bitmap(500, 500);
        g1 = Graphics.FromImage(this.pictureBox1.Image);
        Pen gridPen = new Pen(Color.Black, 2);
        g1.DrawLine(gridPen, 0, 0, 100, 100);

    }

这就是我想要完成的事情:

Answer 1

我发现了这个问题: 在Windows窗体中有效地绘制网格

以下是它的要点:

private void pictureBox1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            int numOfCells = 200;
            int cellSize = 5;
            Pen p = new Pen(Color.Black);

            for (int y = 0; y < numOfCells; ++y)
            {
                g.DrawLine(p, 0, y * cellSize, numOfCells * cellSize, y * cellSize);
            }

            for (int x = 0; x < numOfCells; ++x)
            {
                g.DrawLine(p, x * cellSize, 0, x * cellSize, numOfCells * cellSize);
            }
        }

相应地自定义