本文实例为大家分享了C#实现网页画图的具体代码,供大家参考,具体内容如下
代码贴着保存下
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Web; using System.Web.UI; using System.Web.UI.WebControls; using System.IO; using System.Drawing; using System.Drawing.Drawing2D; using System.Drawing.Imaging; public partial class _Default : System.Web.UI.Page { int h = 1000; int w = 1000; protected void Page_Load( object sender, EventArgs e) { Bitmap img = new Bitmap(h, w); //创建Bitmap对象 MemoryStream stream = draw(); img.Save(stream, ImageFormat.Jpeg); //保存绘制的图片 Response.Clear(); Response.ContentType = "image/jpeg" ; Response.BinaryWrite(stream.ToArray()); } public MemoryStream draw() { string [] Words = { "壹" , "贰" , "叁" , "肆" , "伍" , "陆" }; Bitmap img = new Bitmap(h, w); //创建Bitmap对象 Graphics g = Graphics.FromImage(img); //创建Graphics对象 g.DrawRectangle( new Pen(Color.White, img.Height), 2, 2, img.Width - 2, img.Height - 2); //矩形 底色 ArrayList coordinate = getXY(Words.Length,img.Height,img.Width); ArrayList Radius = new ArrayList(); var R = new Random(); Color Mycolor = Color.FromArgb(R.Next(100, 150), R.Next(255), R.Next(255), R.Next(255)); Font font = new Font( "Arial" , 20); // 字体 LinearGradientBrush font_brush = new LinearGradientBrush( new Rectangle(0, 0, img.Width, img.Height), Color.Black, Color.Black, 1.2F, true ); int j = 0; //画圆 写字 foreach (Point p in coordinate) { int r = R.Next(20, 40); Radius.Add(r); SolidBrush bush = new SolidBrush(Mycolor); g.FillEllipse(bush, p.X - r, p.Y - r, 2*r, 2*r); //画填充椭圆的方法,x坐标、y坐标、宽、高: g.DrawString(Words[j++], font, font_brush, p); // 标记 } //连线 var penColor = Color.FromArgb(140, R.Next(255), R.Next(255), R.Next(255)); for ( int i = 1; i < coordinate.Count; i++) { Pen pen = new Pen(penColor, 2); g.DrawLine(pen, (Point)coordinate[0], (Point)coordinate[i]); } MemoryStream stream = new MemoryStream(); //保存绘制的图片 img.Save(stream, ImageFormat.Jpeg); //保存绘制的图片 return stream; } private ArrayList getXY( int len, int h, int w) { ArrayList al = new ArrayList(); double d = 50.0; var R = new Random(); int h1 = ( int )(0.1 * h); int h2 = ( int )(0.9 * h); int w1 = ( int )(0.1 * w); int w2 = ( int )(0.9 * w); while (al.Count < len) { Point p = new Point(R.Next(h1,h2), R.Next(w1,w2)); bool Add = true ; foreach (Point q in al) { if (Dist(p, q) < d) { Add = false ; break ; } } if (Add) al.Add(p); } return al; } private double Dist(Point p1,Point p2) { return Math.Sqrt(Math.Abs(p1.X - p2.X) * Math.Abs(p1.X - p2.X) + Math.Abs(p1.Y - p2.Y) * Math.Abs(p1.Y - p2.Y)); } } |
效果如下
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持服务器之家。
原文链接:https://blog.csdn.net/epleone/article/details/46128017