formpolygon.cs

来自「csharp课本的源代码」· CS 代码 · 共 55 行

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;

namespace PolygonExample
{
    public partial class FormPolygon : Form
    {
        public FormPolygon()
        {
            InitializeComponent();
        }

        private void FormPolygon_Paint(object sender, PaintEventArgs e)
        {
            //创建Graphics对象
            Graphics g = e.Graphics;
            // 创建一支红色的笔
            Pen pen = new Pen(Color.Red);
            // 定义多边形的点
            Point[] points =
        {
            new Point (50,50),
            new Point (100,50),
            new Point (130,90),
            new Point (130,140),
            new Point (100,180),
            new Point (50,180),
            new Point (20,140),
            new Point (20,90)
        };
            //绘制多边形轮廓
            g.DrawPolygon(pen, points);
            //定义第二个多边形的点
            Point[] points1 =
        {
            new Point (250,50),
            new Point (300,50),
            new Point (330,90),
            new Point (330,140),
            new Point (300,180),
            new Point (250,180),
            new Point (220,140),
            new Point (220,90)
        };
            //填充多边形封闭区域
            g.FillPolygon(new SolidBrush(Color.Red), points1);
        }

    }
}