代码
1
public
Bitmap CreateImage(
string
code)
2
{
3
4
Bitmap image
=
new
Bitmap(
100
,
30
);
5
Graphics g
=
Graphics.FromImage(image);
6
//
WebColorConverter ww = new WebColorConverter();
7
//
g.Clear((Color)ww.ConvertFromString("#FAE264"));
8
9
Random random
=
new
Random();
10
//
画图片的背景噪音线
11
for
(
int
i
=
0
; i
<
12
; i
++
)
12
{
13
int
x1
=
random.Next(image.Width);
14
int
x2
=
random.Next(image.Width);
15
int
y1
=
random.Next(image.Height);
16
int
y2
=
random.Next(image.Height);
17
18
g.DrawLine(
new
Pen(Color.LightGray), x1, y1, x2, y2);
19
}
20
Font font
=
new
Font(
"
Arial
"
,
15
, FontStyle.Bold
|
FontStyle.Italic);
21
System.Drawing.Drawing2D.LinearGradientBrush brush
=
new
System.Drawing.Drawing2D.LinearGradientBrush(
22
new
Rectangle(
0
,
0
, image.Width, image.Height), Color.Blue, Color.Gray,
1.2f
,
true
);
23
g.DrawString(code, font, brush,
0
,
0
);
24
25
画图片的前景噪音点
26
for
(
int
i
=
0
; i
<
10
; i
++
)
27
{
28
int
x
=
random.Next(image.Width);
29
int
y
=
random.Next(image.Height);
30
image.SetPixel(x, y, Color.White);
31
}
32
33
//
画图片的边框线
34
g.DrawRectangle(
new
Pen(Color.Silver),
0
,
0
, image.Width
-
1
, image.Height
-
1
);
35
g.DrawRectangle(
new
Pen(Color.Silver),
0
,
0
, image.Width, image.Height
-
1
);
36
37
System.IO.MemoryStream ms
=
new
System.IO.MemoryStream();
38
image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
39
Response.ClearContent();
40
Response.ContentType
=
"
image/Gif
"
;
41
Response.BinaryWrite(ms.ToArray());
42
g.Dispose();
43
image.Dispose();
44
45
return
image;
46
}
代码出处来自于网络,具体出处忘记了,不好意思。
转载于:https://www.cnblogs.com/angleSJW/archive/2009/12/17/1626081.html
相关资源:前端js动态绘制验证码
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