447 lines
16 KiB
C#
447 lines
16 KiB
C#
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Drawing.Drawing2D;
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using System.Drawing.Imaging;
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using System.IO;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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using System.Web;
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using System.Web.Security;
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using MyCode.Project.Infrastructure.Common;
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namespace MyCode.Project.Infrastructure.Common
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{
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/// <summary>
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/// 生成验证码的类
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/// </summary>
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public static class ValidateCodeUtils
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{
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/// <summary>
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/// 生成验证码
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/// </summary>
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/// <param name="length">指定验证码的长度</param>
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/// <returns></returns>
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public static string CreateValidateCode(int pMax)
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{
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pMax = (pMax < 2 || pMax > 6) ? 4 : pMax;
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int[] randMembers = new int[pMax];
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int[] validateNums = new int[pMax];
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StringBuilder validateNumberStr = new StringBuilder();
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//生成起始序列值
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int seekSeek = unchecked((int)DateTime.Now.Ticks);
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Random seekRand = new Random(seekSeek);
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int beginSeek = seekRand.Next(0, Int32.MaxValue - pMax * 10000);
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int[] seeks = new int[pMax];
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for (int i = 0; i < pMax; i++)
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{
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beginSeek += 10000;
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seeks[i] = beginSeek;
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}
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//生成随机数字
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for (int i = 0; i < pMax; i++)
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{
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Random rand = new Random(seeks[i]);
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int pownum = 1 * (int)Math.Pow(10, pMax);
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randMembers[i] = rand.Next(pownum, Int32.MaxValue);
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}
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//抽取随机数字
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for (int i = 0; i < pMax; i++)
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{
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string numStr = randMembers[i].ToString();
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int numLength = numStr.Length;
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Random rand = new Random();
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int numPosition = rand.Next(0, numLength - 1);
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validateNums[i] = Int32.Parse(numStr.Substring(numPosition, 1));
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}
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//生成验证码
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for (int i = 0; i < pMax; i++)
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{
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validateNumberStr.Append(validateNums[i]);
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}
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return validateNumberStr.ToString();
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}
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/// <summary>
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/// 创建验证码的图片
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/// </summary>
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/// <param name="validateCode"></param>
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public static byte[] CreateValidateGraphic(string validateCode, Color bgColor)
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{
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//Bitmap image = new Bitmap((int)Math.Ceiling(validateCode.Length * 12.0), 22);
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Bitmap image = new Bitmap(115, 45);
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Graphics g = Graphics.FromImage(image);
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using (image)
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{
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using (g)
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{
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//生成随机生成器
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Random random = new Random();
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//清空图片背景色
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g.Clear(bgColor);
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//画图片的干扰线
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for (int i = 0; i < 25; i++)
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{
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int x1 = random.Next(image.Width);
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int x2 = random.Next(image.Width);
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int y1 = random.Next(image.Height);
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int y2 = random.Next(image.Height);
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g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
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}
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Font font = new Font("Arial", 20, (FontStyle.Bold | FontStyle.Italic));
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LinearGradientBrush brush = new LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height),
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Color.Blue, Color.DarkRed, 1.2f, true);
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g.DrawString(validateCode, font, brush, 6, 5);
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//画图片的前景干扰点
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for (int i = 0; i < 60; i++)
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{
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int x = random.Next(image.Width);
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int y = random.Next(image.Height);
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image.SetPixel(x, y, Color.FromArgb(random.Next()));
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}
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//画图片的边框线
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g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
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//保存图片数据
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MemoryStream stream = new MemoryStream();
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image.Save(stream, ImageFormat.Jpeg);
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//输出图片流
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return stream.ToArray();
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}
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}
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}
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public static string[] GenerateCheckCode()
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{
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string[] result = new string[2];
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int intFirst, intSec, intTemp;
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string checkCode = String.Empty;
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System.Random random = new Random();
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intFirst = random.Next(1, 10);
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intSec = random.Next(1, 10);
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switch (random.Next(1, 3).ToString())
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{
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case "2":
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if (intFirst < intSec)
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{
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intTemp = intFirst;
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intFirst = intSec;
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intSec = intTemp;
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}
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checkCode = intFirst + "-" + intSec + "=";
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result[0] = checkCode;
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result[1] = intFirst - intSec + "";
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break;
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default:
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checkCode = intFirst + "+" + intSec + "=";
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result[0] = checkCode;
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result[1] = intFirst + intSec + "";
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break;
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}
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return result;
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}
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#region 产生波形滤镜效果
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private const double PI = 3.1415926535897932384626433832795;
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private const double PI2 = 6.283185307179586476925286766559;
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private static System.Drawing.Bitmap TwistImage(Bitmap srcBmp, bool bXDir, double dMultValue, double dPhase)
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{
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System.Drawing.Bitmap destBmp = new Bitmap(srcBmp.Width, srcBmp.Height);
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// 将位图背景填充为白色
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System.Drawing.Graphics graph = System.Drawing.Graphics.FromImage(destBmp);
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graph.FillRectangle(new SolidBrush(System.Drawing.Color.White), 0, 0, destBmp.Width, destBmp.Height);
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graph.Dispose();
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double dBaseAxisLen = bXDir ? (double)destBmp.Height : (double)destBmp.Width;
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for (int i = 0; i < destBmp.Width; i++)
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{
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for (int j = 0; j < destBmp.Height; j++)
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{
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double dx = 0;
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dx = bXDir ? (PI2 * (double)j) / dBaseAxisLen : (PI2 * (double)i) / dBaseAxisLen;
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dx += dPhase;
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double dy = Math.Sin(dx);
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// 取得当前点的颜色
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int nOldX = 0, nOldY = 0;
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nOldX = bXDir ? i + (int)(dy * dMultValue) : i;
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nOldY = bXDir ? j : j + (int)(dy * dMultValue);
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System.Drawing.Color color = srcBmp.GetPixel(i, j);
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if (nOldX >= 0 && nOldX < destBmp.Width
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&& nOldY >= 0 && nOldY < destBmp.Height)
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{
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destBmp.SetPixel(nOldX, nOldY, color);
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}
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}
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}
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return destBmp;
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}
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#endregion
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public static byte[] CreateCheckCodeImage(string checkCode)
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{
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if (checkCode == null || checkCode.Trim() == String.Empty)
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return null;
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System.Drawing.Bitmap image = new System.Drawing.Bitmap((int)Math.Ceiling((checkCode.Length * 15.0)), 25);
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Graphics g = Graphics.FromImage(image);
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try
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{
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//生成随机生成器
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Random random = new Random();
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//清空图片背景色
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g.Clear(Color.White);
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//画图片的背景噪音线
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for (int i = 0; i < 12; i++)
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{
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int x1 = random.Next(image.Width);
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int x2 = random.Next(image.Width);
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int y1 = random.Next(image.Height);
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int y2 = random.Next(image.Height);
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g.DrawLine(new Pen(Color.Silver), x1, y1, x2, y2);
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}
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Font font = new System.Drawing.Font("Arial", 16, (System.Drawing.FontStyle.Bold | System.Drawing.FontStyle.Italic));
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System.Drawing.Drawing2D.LinearGradientBrush brush = new System.Drawing.Drawing2D.LinearGradientBrush(new Rectangle(0, 0, image.Width, image.Height), Color.Blue, Color.DarkRed, 1.2f, true);
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g.DrawString(checkCode, font, brush, 1, 1);
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//画图片的边框线
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g.DrawRectangle(new Pen(Color.Silver), 0, 0, image.Width - 1, image.Height - 1);
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System.IO.MemoryStream ms = new System.IO.MemoryStream();
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image.Save(ms, System.Drawing.Imaging.ImageFormat.Gif);
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return ms.ToArray();
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}
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finally
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{
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g.Dispose();
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image.Dispose();
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}
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}
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/// <summary>
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/// 检查图片验证码
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/// </summary>
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/// <returns></returns>
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public static bool ValidateCode(string code)
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{
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try
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{
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//从请求上下文中获取用户的登录信息。
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HttpRequest request = HttpContext.Current.Request;
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if (request.Cookies.AllKeys.Contains("ImageCode"))
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{
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//获取后并且解析cookie中的验证码信息
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HttpCookie cookie = request.Cookies["ImageCode"];
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if (cookie.Value == EncryptHelper.SHA1Hash(code))
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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}
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catch (Exception)
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{
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//这里出现异常直接忽略
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}
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return false;
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}
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/// <summary>
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/// 保存图片验证码。
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/// </summary>
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/// <returns></returns>
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public static void SaveValidateCode(string code)
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{
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//将验证码加密后储存到cookie中
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HttpContext.Current.Response.Cookies.Add(new HttpCookie("ImageCode", EncryptHelper.SHA1Hash(code)));
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}
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}
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/// <summary>
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/// 随机图片
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/// </summary>
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public sealed class RandomImage : IDisposable
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{
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//property
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public string Text
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{
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get { return _text; }
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}
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public Bitmap Image
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{
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get { return _image; }
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}
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public int Width
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{
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get { return _width; }
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}
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public int Height
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{
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get { return _height; }
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}
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//Private variable
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private string _text;
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private int _width;
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private int _height;
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private Bitmap _image;
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private readonly Random _random = new Random();
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~RandomImage()
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{
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Dispose(false);
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}
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public void Dispose()
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{
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GC.SuppressFinalize(this);
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Dispose(true);
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}
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private void Dispose(bool disposing)
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{
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if (disposing)
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_image.Dispose();
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}
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private void SetDimensions(int width, int height)
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{
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_width = width <= 80 ? 100 : width;
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_height = height <= 22 ? 22 : height;
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}
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/// <summary>
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/// 产生图片
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/// </summary>
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/// <param name="s">The s.</param>
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/// <param name="width">The width.</param>
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/// <param name="height">The height.</param>
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public void GenerateImage(string s, int width, int height)
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{
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_text = s;
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SetDimensions(width, height);
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SaveImage();
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}
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/// <summary>
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/// 生成验证码
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/// </summary>
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/// <param name="pMax">The p maximum.</param>
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/// <returns></returns>
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public String GenerateRandomCode(Int32 pMax)
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{
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pMax = (pMax < 2 || pMax > 6) ? 4 : pMax;
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int[] randMembers = new int[pMax];
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int[] validateNums = new int[pMax];
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StringBuilder validateNumberStr = new StringBuilder();
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//生成起始序列值
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int seekSeek = unchecked((int)DateTime.Now.Ticks);
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Random seekRand = new Random(seekSeek);
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int beginSeek = seekRand.Next(0, Int32.MaxValue - pMax * 10000);
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int[] seeks = new int[pMax];
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for (int i = 0; i < pMax; i++)
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{
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beginSeek += 10000;
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|
seeks[i] = beginSeek;
|
|||
|
|
}
|
|||
|
|
//生成随机数字
|
|||
|
|
for (int i = 0; i < pMax; i++)
|
|||
|
|
{
|
|||
|
|
Random rand = new Random(seeks[i]);
|
|||
|
|
int pownum = 1 * (int)Math.Pow(10, pMax);
|
|||
|
|
randMembers[i] = rand.Next(pownum, Int32.MaxValue);
|
|||
|
|
}
|
|||
|
|
//抽取随机数字
|
|||
|
|
for (int i = 0; i < pMax; i++)
|
|||
|
|
{
|
|||
|
|
string numStr = randMembers[i].ToString();
|
|||
|
|
int numLength = numStr.Length;
|
|||
|
|
Random rand = new Random();
|
|||
|
|
int numPosition = rand.Next(0, numLength - 1);
|
|||
|
|
validateNums[i] = Int32.Parse(numStr.Substring(numPosition, 1));
|
|||
|
|
}
|
|||
|
|
//生成验证码
|
|||
|
|
for (int i = 0; i < pMax; i++)
|
|||
|
|
{
|
|||
|
|
validateNumberStr.Append(validateNums[i]);
|
|||
|
|
}
|
|||
|
|
return validateNumberStr.ToString();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// 生成图片
|
|||
|
|
/// </summary>
|
|||
|
|
private void SaveImage()
|
|||
|
|
{
|
|||
|
|
Bitmap bitmap = new Bitmap
|
|||
|
|
(_width, _height, PixelFormat.Format32bppArgb);
|
|||
|
|
Graphics g = Graphics.FromImage(bitmap);
|
|||
|
|
g.SmoothingMode = SmoothingMode.AntiAlias;
|
|||
|
|
Rectangle rect = new Rectangle(0, 0, _width, _height);
|
|||
|
|
HatchBrush hatchBrush = new HatchBrush(HatchStyle.SmallConfetti,
|
|||
|
|
Color.LightGray, Color.White);
|
|||
|
|
g.FillRectangle(hatchBrush, rect);
|
|||
|
|
SizeF size;
|
|||
|
|
float fontSize = rect.Height + 1;
|
|||
|
|
Font font;
|
|||
|
|
|
|||
|
|
do
|
|||
|
|
{
|
|||
|
|
fontSize--;
|
|||
|
|
font = new Font(FontFamily.GenericSansSerif, fontSize, FontStyle.Bold);
|
|||
|
|
size = g.MeasureString(_text, font);
|
|||
|
|
} while (size.Width > rect.Width);
|
|||
|
|
|
|||
|
|
StringFormat format = new StringFormat();
|
|||
|
|
format.Alignment = StringAlignment.Center;
|
|||
|
|
format.LineAlignment = StringAlignment.Center;
|
|||
|
|
GraphicsPath path = new GraphicsPath();
|
|||
|
|
path.AddString(_text, font.FontFamily, (int)font.Style, 33.8256f, rect, format);
|
|||
|
|
float v = 4F;
|
|||
|
|
PointF[] points =
|
|||
|
|
{
|
|||
|
|
new PointF(_random.Next(rect.Width) / v, _random.Next(
|
|||
|
|
rect.Height) / v),
|
|||
|
|
new PointF(rect.Width - _random.Next(rect.Width) / v,
|
|||
|
|
_random.Next(rect.Height) / v),
|
|||
|
|
new PointF(_random.Next(rect.Width) / v,
|
|||
|
|
rect.Height - _random.Next(rect.Height) / v),
|
|||
|
|
new PointF(rect.Width - _random.Next(rect.Width) / v,
|
|||
|
|
rect.Height - _random.Next(rect.Height) / v)
|
|||
|
|
};
|
|||
|
|
Matrix matrix = new Matrix();
|
|||
|
|
matrix.Translate(0F, 0F);
|
|||
|
|
path.Warp(points, rect, matrix, WarpMode.Perspective, 0F);
|
|||
|
|
hatchBrush = new HatchBrush(HatchStyle.Percent10, Color.Black, Color.SkyBlue);
|
|||
|
|
g.FillPath(hatchBrush, path);
|
|||
|
|
int m = Math.Max(rect.Width, rect.Height);
|
|||
|
|
for (int i = 0; i < (int)(rect.Width * rect.Height / 30F); i++)
|
|||
|
|
{
|
|||
|
|
int x = _random.Next(rect.Width);
|
|||
|
|
int y = _random.Next(rect.Height);
|
|||
|
|
int w = _random.Next(m / 50);
|
|||
|
|
int h = _random.Next(m / 50);
|
|||
|
|
g.FillEllipse(hatchBrush, x, y, w, h);
|
|||
|
|
}
|
|||
|
|
font.Dispose();
|
|||
|
|
hatchBrush.Dispose();
|
|||
|
|
g.Dispose();
|
|||
|
|
_image = bitmap;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|