8miu差不多的验证码。

using System;using System.Collections.Generic;using System.Text;using System.Drawing;using System.Drawing.Imaging;using System.IO;using System.Collections;

namespace ValidateCode{    public class VCode    {        public MemoryStream DrawVCode(string content)        {            System.Random random = new Random();

            //创建图片对象            System.Drawing.Bitmap image = new Bitmap((int)content.Length * 17, 30);            Graphics gh = Graphics.FromImage(image);

            ArrayList bgcolor = new ArrayList();            bgcolor.Add(Color.Honeydew);            bgcolor.Add(Color.AliceBlue);            bgcolor.Add(Color.White);            bgcolor.Add(Color.Azure);            bgcolor.Add(Color.OldLace);            bgcolor.Add(Color.Lavender);            gh.Clear((Color)bgcolor[random.Next(0, 5)]);

            //噪音线颜色数组            System.Collections.ArrayList c = new ArrayList();            c.Add(Color.Silver);            c.Add(Color.SeaShell);            c.Add(Color.SkyBlue);

            for (int i = 0; i < 25; i++)            {                int x1 = random.Next(image.Width);                int x2 = random.Next(image.Width);                int y1 = random.Next(image.Height);                int y2 = random.Next(image.Height);

                gh.DrawLine(new Pen((Color)c[random.Next(0, 2)]), x1, y1, x2, y2);            }            //噪音点            for (int i = 0; i < 200; i++)            {                int x = random.Next(1, image.Width - 2);                int y = random.Next(1, image.Height - 2);

                image.SetPixel(x, y, Color.FromArgb(random.Next()));            }

 

            //设定字体颜色            System.Collections.ArrayList cb = new ArrayList();            cb.Add(Color.Black);            cb.Add(Color.DarkBlue);            cb.Add(Color.Purple);            cb.Add(Color.Indigo);            cb.Add(Color.DarkRed);            cb.Add(Color.IndianRed);            char[] CArray = content.ToCharArray();            for (int i = 0; i < CArray.Length; i++)            {                string cstr = CArray[i].ToString();                Font f = new Font("Times New Roman", 15);                gh.DrawString(cstr, f, new SolidBrush((Color)cb[random.Next(0, 5)]), 2 + ((int)f.SizeInPoints) * i, 2);            }

            gh.DrawRectangle(new Pen((Color)cb[random.Next(0, 5)]), 0, 0, image.Width - 1, image.Height - 1);  //汇出边框

            System.IO.MemoryStream ms = new System.IO.MemoryStream();            image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);            Response.ClearContent();            return ms.ToArray();        }

    }}==========编译成组件