form1.cs

来自「csharp课本的源代码」· CS 代码 · 共 65 行

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
namespace PenExample
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            
            //创建Graphics对象
            Graphics g = e.Graphics;
            //创建一支黑色的笔
            Pen blackpen = new Pen(Color.Black, 10.0f);
            //绘制字符串
            g.DrawString("黑色,宽度为10.0", this.Font, Brushes.Black, 5, 5);
            //绘制宽度为10.0f的黑色直线
            g.DrawLine(blackpen, new Point(110, 12), new Point(400, 12));
            //创建一支红色的笔
            Pen redpen = new Pen(Color.Red, 5.0f);
            //绘制字符串
            g.DrawString("红色,宽度为5", this.Font, Brushes.Black, 5, 25);
            //绘制宽度为5的红色直线
            g.DrawLine(redpen, new Point(110, 30), new Point(400, 30));
            //创建一支蓝色的笔
            Pen bluepen = new Pen(Color.Blue,6);
            //定义直线的样式
            bluepen.StartCap = LineCap.Flat;
            bluepen.EndCap = LineCap.ArrowAnchor;
            //绘制字符串
            g.DrawString("蓝色箭头线", this.Font, Brushes.Black, 5, 45);
            //绘制宽度为6的蓝色箭头线
            g.DrawLine(bluepen, new Point(110, 50), new Point(400, 50));
            //再创建一支黑色的画笔
            Pen iblackpen = new Pen(Color.Black, 2.0f);
            //定义直线的样式
            iblackpen.DashStyle = DashStyle.Custom;
            iblackpen.DashPattern = new float[] { 4, 4 };
            iblackpen.EndCap = LineCap.NoAnchor;
            //绘制字符串
            g.DrawString("自定义虚线", this.Font, Brushes.Black, 5, 65);
            //绘制宽度为2的自定义虚线
            g.DrawLine(iblackpen, new Point(110, 70), new Point(400, 70));
            //再创建一支红色的画笔
            Pen iredpen = new Pen(Color.Red, 2.0f);
            //定义直线的样式
            iredpen.DashStyle = DashStyle.Dot;
            //绘制字符串
            g.DrawString("点划线", this.Font, Brushes.Black, 5, 85);
            //绘制宽度为2的点划线
            g.DrawLine(iredpen, new Point(110, 90), new Point(400, 90));
    
        }
    }
}