当前文件路径：ChineseCode/Img.aspx.cs

		            
  1using System;
  2using System.Data;
  3using System.Configuration;
  4using System.Collections;
  5using System.Web;
  6using System.Web.Security;
  7using System.Web.UI;
  8using System.Web.UI.WebControls;
  9using System.Web.UI.WebControls.WebParts;
 10using System.Web.UI.HtmlControls;
 11using System.Text;
 12using System.Drawing;
 13//该源码下载自www.51aspx.com(５１ａｓｐx．ｃｏｍ)
 14
 15public partial class Img : System.Web.UI.Page
 16...{
 17    protected void Page_Load(object sender, EventArgs e)
 18    ...{
 19        //获取GB2312编码页（表） 
 20        Encoding gb = Encoding.GetEncoding("gb2312");
 21
 22        //调用函数产生4个随机中文汉字编码 
 23        object[] bytes = ChineseCode.CreateRegionCode(4);
 24
 25        //根据汉字编码的字节数组解码出中文汉字 
 26        string str1 = gb.GetString((byte[])Convert.ChangeType(bytes[0], typeof(byte[])));
 27        string str2 = gb.GetString((byte[])Convert.ChangeType(bytes[1], typeof(byte[])));
 28        string str3 = gb.GetString((byte[])Convert.ChangeType(bytes[2], typeof(byte[])));
 29        string str4 = gb.GetString((byte[])Convert.ChangeType(bytes[3], typeof(byte[])));
 30        string[] str = new string[] ...{ str1, str2, str3, str4 };
 31
 32        CreateCheckCodeImage(str);
 33
 34        PublicCla.HZ = str1 + str2 + str3 + str4;
 35    }
 36
 37    private void CreateCheckCodeImage(string[] checkCode)
 38    ...{
 39        if (checkCode == null || checkCode.Length <= 0)
 40            return;
 41
 42        System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 32.5)), 60);
 43        System.Drawing.Graphics g = Graphics.FromImage(image);
 44
 45        try
 46        ...{
 47            //生成随机生成器 
 48            Random random = new Random();
 49
 50            //清空图片背景色 
 51            g.Clear(Color.White);
 52
 53            //画图片的背景噪音线 
 54            for (int i = 0; i < 20; i++)
 55            ...{
 56                int x1 = random.Next(image.Width);
 57                int x2 = random.Next(image.Width);
 58                int y1 = random.Next(image.Height);
 59                int y2 = random.Next(image.Height);
 60
 61                g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
 62            }
 63
 64            //定义颜色
 65            Color[] c = ...{ Color.Black, Color.Red, Color.DarkBlue, Color.Green, Color.Orange, Color.Brown, Color.DarkCyan, Color.Purple };
 66            //定义字体
 67            string[] f = ...{ "Verdana", "Microsoft Sans Serif", "Comic Sans MS", "Arial", "宋体" };
 68
 69            for (int k = 0; k <= checkCode.Length - 1; k++)
 70            ...{
 71                int cindex = random.Next(7);
 72                int findex = random.Next(5);
 73
 74                Font drawFont = new Font(f[findex], 16, (System.Drawing.FontStyle.Bold));
 75
 76
 77
 78                SolidBrush drawBrush = new SolidBrush(c[cindex]);
 79
 80                float x = 5.0F;
 81                float y = 0.0F;
 82                float width = 20.0F;
 83                float height = 25.0F;
 84                int sjx = random.Next(10);
 85                int sjy = random.Next(image.Height - (int)height);
 86
 87                RectangleF drawRect = new RectangleF(x + sjx + (k * 25), y + sjy, width, height);
 88
 89                StringFormat drawFormat = new StringFormat();
 90                drawFormat.Alignment = StringAlignment.Center;
 91
 92                g.DrawString(checkCode[k], drawFont, drawBrush, drawRect, drawFormat);
 93            }
 94
 95            //画图片的前景噪音点 
 96            for (int i = 0; i < 100; i++)
 97            ...{
 98                int x = random.Next(image.Width);
 99                int y = random.Next(image.Height);
100
101                image.SetPixel(x, y, Color.FromArgb(random.Next()));
102            }
103
104            //画图片的边框线 
105            g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
106
107            System.IO.MemoryStream ms = new System.IO.MemoryStream();
108            image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
109            Response.ClearContent();
110            Response.ContentType = "image/Gif";
111            Response.BinaryWrite(ms.ToArray());
112        }
113        finally
114        ...{
115            g.Dispose();
116            image.Dispose();
117        }
118    }
119}
120