C#编程-130：Brush的五个继承类

using System;
using System.Drawing;
using System.Windows.Forms;
namespace SolidBrushTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            Brush brush = new SolidBrush(Color.Orange);
            g.FillEllipse(brush, 10, 10, 200, 120);
            g.Dispose();
        }
    }
}

using System;
using System.Drawing;
using System.Windows.Forms;
using System.IO;
namespace TextureBrushTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            string path = @"D:\CS\GDIPlusTest\TextureBrushTest\img\微信图片_20170817213231.jpg";
            Graphics g=e.Graphics;
            if (File.Exists(path))
            {
                Bitmap map = new Bitmap(path);
                Brush brush = new TextureBrush(map);
                g.FillEllipse(brush, 10, 10, 500, 500);
                brush.Dispose();
            }
            else
            {
                MessageBox.Show("image is not exists");
            }
            g.Dispose();
        }
    }
}

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
namespace LinearGradientBrushTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
            private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Graphics g = e.Graphics;
            LinearGradientBrush lgb = new LinearGradientBrush(new Point(10,10),new Point(290,90),Color.White,Color.FromArgb(255,0,0,0));
            g.FillEllipse(lgb,10,10,280,120);
            lgb.Dispose();
            g.Dispose();
        }
    }
}

using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
namespace PathGradientBrushTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            //绘画路径
            GraphicsPath gp = new GraphicsPath();
            gp.AddEllipse(0,80,240,120);
            //路径渐变画刷
            PathGradientBrush pgb = new PathGradientBrush(gp);
            pgb.CenterColor = Color.Orange;
            Color[] colors = { Color.FromArgb(255,0,255,0)};
            pgb.SurroundColors = colors;
            //绘制椭圆
            e.Graphics.FillEllipse(pgb,0,80,240,120);
            pgb.Dispose();
        }
    }
}

using System.Drawing;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
namespace HatchBrushTest
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            HatchBrush hatchBrush = new HatchBrush(HatchStyle.HorizontalBrick,Color.Red,Color.Yellow);
            e.Graphics.FillEllipse(hatchBrush,0,80,240,120);
            hatchBrush.Dispose();
        }
    }
}