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 = ;

        int width = ;

        int height = ;

        int w = ;

        int h = ;

        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(, w,  * w, h); l.Add(r);

            r = new Rectangle( * w, ,  * w, h); l.Add(r);

            r = new Rectangle( * w,  * w,  * 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 = ; p2.X = width;

            for (int y = ; y <= height; y = y + h)

            {

                p1.Y = y; p2.Y = y;

                DrawLine(p1, p2, e);

            }

            p1.Y = ; p2.Y = height;

            for (int x = ; 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);

        }

    }

}