86 lines
2.6 KiB
C#
86 lines
2.6 KiB
C#
/*******************************************************************************
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* Copyright © 2016 HT.Cloud.Framework 版权所有
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* Author: HT.Cloud
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* Description: WaterCloud快速开发平台
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* Website：
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*********************************************************************************/
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using System;
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using System.DrawingCore;
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using System.DrawingCore.Imaging;
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using System.IO;
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namespace HT.Cloud.Code
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{
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public class VerifyCodeHelper
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{
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public byte[] GetVerifyCode()
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{
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int codeW = 80;
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int codeH = 30;
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int fontSize = 16;
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string chkCode = string.Empty;
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//颜色列表，用于验证码、噪线、噪点
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Color[] color = { Color.Black, Color.Red, Color.Blue, Color.Green, Color.Orange, Color.Brown, Color.Brown, Color.DarkBlue };
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//字体列表，用于验证码
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string[] font = { "Times New Roman" };
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//验证码的字符集，去掉了一些容易混淆的字符
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char[] character = { '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'd', 'e', 'f', 'h', 'k', 'm', 'n', 'r', 'x', 'y', 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'J', 'K', 'L', 'M', 'N', 'P', 'R', 'S', 'T', 'W', 'X', 'Y' };
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Random rnd = new Random();
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//生成验证码字符串
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for (int i = 0; i < 4; i++)
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{
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chkCode += character[rnd.Next(character.Length)];
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}
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//写入Session、验证码加密
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WebHelper.WriteSession("wcloud_session_verifycode", Md5.md5(chkCode.ToLower(), 16));
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//创建画布
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Bitmap bmp = new Bitmap(codeW, codeH);
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Graphics g = Graphics.FromImage(bmp);
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g.Clear(Color.White);
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//画噪线
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for (int i = 0; i < 3; i++)
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{
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int x1 = rnd.Next(codeW);
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int y1 = rnd.Next(codeH);
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int x2 = rnd.Next(codeW);
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int y2 = rnd.Next(codeH);
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Color clr = color[rnd.Next(color.Length)];
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g.DrawLine(new Pen(clr), x1, y1, x2, y2);
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}
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//画验证码字符串
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for (int i = 0; i < chkCode.Length; i++)
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{
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string fnt = font[rnd.Next(font.Length)];
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Font ft = new Font(fnt, fontSize);
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Color clr = color[rnd.Next(color.Length)];
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g.DrawString(chkCode[i].ToString(), ft, new SolidBrush(clr), (float)i * 18, (float)0);
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}
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//将验证码图片写入内存流，并将其以 "image/Png" 格式输出
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MemoryStream ms = new MemoryStream();
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try
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{
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bmp.Save(ms, ImageFormat.Png);
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return ms.ToArray();
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}
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catch (Exception)
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{
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return null;
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}
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finally
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{
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g.Dispose();
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bmp.Dispose();
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}
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}
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}
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public class GetJsVesion
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{
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public static string GetVcode()
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{
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TimeSpan ts = DateTime.UtcNow - new DateTime(1970, 1, 1, 0, 0, 0, 0);
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return Convert.ToInt64(ts.TotalSeconds).ToString();
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}
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}
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} |