gdippens.cs

一本很好的教材.C#开发者必备.内容全面,很难得哦.

namespace GDIPlus.GDIPPens {
    using System;
    using System.Windows.Forms;
    using System.IO;
    using System.Drawing;
    using System.Drawing.Drawing2D;
    using System.Reflection;

    public class PensSample : Form {
        /// <summary>
        ///    必需的设计器变量
        /// </summary>
        private System.ComponentModel.Container components;

        private Brush backgroundBrush;
        private Brush penTextureBrush;

        public PensSample() {
            //
            // Windows 窗体设计器支持所必需的
            //
            InitializeComponent();

            this.SetStyle(System.Windows.Forms.ControlStyles.Opaque, true);

            //从可执行文件的资源分支中加载要用于背景的图像
            Image backgroundImage = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("colorbars.jpg"));

            //现在创建要用于绘制背景的画笔
            backgroundBrush = new TextureBrush(backgroundImage);

            //从可执行文件的资源分支中加载粗画笔要使用的图像
            Image penImage = new Bitmap(Assembly.GetExecutingAssembly().GetManifestResourceStream("BoilingPoint.jpg"));
            penTextureBrush = new TextureBrush(penImage);
        }


        protected override void OnPaint(PaintEventArgs e) {
            Graphics g = e.Graphics;

            e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;

            //用粗画笔填充背景 
            //然后应用白色涂料 
            g.FillRectangle(backgroundBrush, ClientRectangle);
            g.FillRectangle(new SolidBrush(Color.FromArgb(180, Color.White)), ClientRectangle);

            //创建一支部分透明的、紫色的 20 像素宽的笔 
            Pen penExample1 = new Pen(Color.FromArgb(150, Color.Purple), 20);
            //将其做成虚线笔
            penExample1.DashStyle = DashStyle.Dash;
            //使末端成为圆角
            penExample1.StartCap = LineCap.Round;
            penExample1.EndCap = LineCap.Round;

            //现在用该笔绘制一条曲线
            g.DrawCurve(penExample1, new Point[] {
                                                 new Point(200, 140),
                                                 new Point(700, 240),
                                                 new Point(500, 340),
                                                 new Point(140, 140),
                                                 new Point(40, 340),
                                                 });


            //现在使用作为填充的位图绘制一条直线
            Pen penExample2 = new Pen(penTextureBrush, 25);
            penExample2.DashStyle = DashStyle.DashDotDot;
            penExample2.StartCap = LineCap.Triangle;
            penExample2.EndCap = LineCap.Round;
            g.DrawLine(penExample2, 10,450,550,400);

        }

        /// <summary>
        ///    清理正在使用的所有资源
        /// </summary>
        protected override void Dispose(bool disposing)
        {
           if (disposing) {
                if (components != null) {
                    components.Dispose();
                }
           }
           base.Dispose(disposing);
        }

        /// <summary>
        ///    设计器支持所必需的方法，不要使用
        ///    代码编辑器修改此方法的内容
        /// </summary>
        private void InitializeComponent() {
            this.components = new System.ComponentModel.Container ();
            this.Size = new System.Drawing.Size(750, 500);
            this.Text = "GDI+ 画笔示例";
        }

        /// <summary>
        /// 应用程序的主入口点
        /// </summary>
        [STAThread]
        public static void Main() {
            Application.Run(new PensSample());
        }
    }
}