using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace DrawGrid{    public partial class Form1 : Form    {        int multiple = 20;        int width = 20;        int height = 16;        int w = 4;        int h = 4;        Pen bluePen = new Pen(Color.Black);        public Form1()        {            InitializeComponent();        }        private void Form1_Paint(object sender, PaintEventArgs e)        {            Console.WriteLine("Form长：{0}，宽：{1}", this.Width, this.Height);            this.Multiple();            DrawGrid(width, height, w, h, e);                       List<Rectangle> l = new List<Rectangle>();            Rectangle r;            r = new Rectangle(0, w, 2 * w, h); l.Add(r);            r = new Rectangle(3 * w, 0, 2 * w, h); l.Add(r);            r = new Rectangle(2 * w, 3 * w, 2 * w, h); l.Add(r);            foreach (Rectangle r1 in l)            {                e.Graphics.FillRectangle(new SolidBrush(Color.Black), r1);            }        }        /// <summary>        /// 将比例放大        /// </summary>        private void Multiple()        {            width = width * multiple;            height = height * multiple;            w = w * multiple;            h = h * multiple;        }        private void Form1_MouseDown(object sender, MouseEventArgs e)        {            Console.WriteLine("X={0},Y={1}", e.X, e.Y);        }        /// <summary>        /// 画网格        /// </summary>        /// <param name="width"></param>        /// <param name="height"></param>        /// <param name="w"></param>        /// <param name="h"></param>        private void DrawGrid(int width, int height, int w, int h, PaintEventArgs e)        {            Point p1 = new Point();            Point p2 = new Point();            p1.X = 0; p2.X = width;            for (int y = 0; y <= height; y = y + h)            {                p1.Y = y; p2.Y = y;                DrawLine(p1, p2, e);            }            p1.Y = 0; p2.Y = height;            for (int x = 0; x <= width; x = x + w)            {                p1.X = x; p2.X = x;                DrawLine(p1, p2, e);            }        }        /// <summary>        /// 画直线        /// </summary>        /// <param name="p1"></param>        /// <param name="p2"></param>        private void DrawLine(Point p1, Point p2, PaintEventArgs e)        {            e.Graphics.DrawLine(bluePen, p1, p2);        }    }}