C#编程-130：Brush的五个继承类

Brush笔刷类，可以用颜色和图像填充图形，是 抽象类，不可以实例化。

实例：

1、SolidBrushTest

1. using System;
2. using System.Drawing;
3. using System.Windows.Forms;
4.  
5. namespace SolidBrushTest
6. {
7.     public partial class Form1 : Form
8.     {
9.         public Form1()
10.         {
11.             InitializeComponent();
12.         }
13.  
14.         private void Form1_Paint(object sender, PaintEventArgs e)
15.         {
16.             Graphics g = e.Graphics;
17.             Brush brush = new SolidBrush(Color.Orange);
18.             g.FillEllipse(brush, 10, 10, 200, 120);
19.             g.Dispose();
20.  
21.         }
22.     }
23. }

2、 TextureBrushTest

1. using System;
2. using System.Drawing;
3. using System.Windows.Forms;
4. using System.IO;
5. namespace TextureBrushTest
6. {
7.     public partial class Form1 : Form
8.     {
9.         public Form1()
10.         {
11.             InitializeComponent();
12.         }
13.         private void Form1_Paint(object sender, PaintEventArgs e)
14.         {
15.             string path = @"D:\CS\GDIPlusTest\TextureBrushTest\img\微信图片_20170817213231.jpg";
16.             Graphics g=e.Graphics;
17.             if (File.Exists(path))
18.             {
19.                 Bitmap map = new Bitmap(path);
20.                 Brush brush = new TextureBrush(map);
21.                 g.FillEllipse(brush, 10, 10, 500, 500);
22.                 brush.Dispose();
23.             }
24.             else
25.             {
26.                 MessageBox.Show("image is not exists");
27.             }
28.             g.Dispose();
29.         }
30.     }
31. }

3、LinearGradientBrushTest

1. using System;
2. using System.Drawing;
3. using System.Windows.Forms;
4. using System.Drawing.Drawing2D;
5. namespace LinearGradientBrushTest
6. {
7.     public partial class Form1 : Form
8.     {
9.         public Form1()
10.         {
11.             InitializeComponent();
12.         }
13.             private void Form1_Paint(object sender, PaintEventArgs e)
14.         {
15.             Graphics g = e.Graphics;
16.             LinearGradientBrush lgb = new LinearGradientBrush(new Point(10,10),new Point(290,90),Color.White,Color.FromArgb(255,0,0,0));
17.             g.FillEllipse(lgb,10,10,280,120);
18.             lgb.Dispose();
19.             g.Dispose();
20.         }
21.     }
22. }

4、 PathGradientBrushTest

1. using System.Drawing;
2. using System.Windows.Forms;
3. using System.Drawing.Drawing2D;
4. namespace PathGradientBrushTest
5. {
6.     public partial class Form1 : Form
7.     {
8.         public Form1()
9.         {
10.             InitializeComponent();
11.         }
12.  
13.         private void Form1_Paint(object sender, PaintEventArgs e)
14.         {
15.             //绘画路径
16.             GraphicsPath gp = new GraphicsPath();
17.             gp.AddEllipse(0,80,240,120);
18.  
19.             //路径渐变画刷
20.             PathGradientBrush pgb = new PathGradientBrush(gp);
21.             pgb.CenterColor = Color.Orange;
22.             Color[] colors = { Color.FromArgb(255,0,255,0)};
23.             pgb.SurroundColors = colors;
24.  
25.             //绘制椭圆
26.             e.Graphics.FillEllipse(pgb,0,80,240,120);
27.             pgb.Dispose();
28.         }
29.     }
30. }

5、 HatchBrushTest

1. using System.Drawing;
2. using System.Windows.Forms;
3. using System.Drawing.Drawing2D;
4. namespace HatchBrushTest
5. {
6.     public partial class Form1 : Form
7.     {
8.         public Form1()
9.         {
10.             InitializeComponent();
11.         }
12.  
13.         private void Form1_Paint(object sender, PaintEventArgs e)
14.         {
15.             HatchBrush hatchBrush = new HatchBrush(HatchStyle.HorizontalBrick,Color.Red,Color.Yellow);
16.             e.Graphics.FillEllipse(hatchBrush,0,80,240,120);
17.             hatchBrush.Dispose();
18.         }
19.     }
20. }