using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Drawing;
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using System.Drawing.Imaging;
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using System.Drawing.Drawing2D;
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namespace CY.Infrastructure
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{
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/// <summary>
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/// 随机数类
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/// </summary>
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public class MathRandom
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{
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/// <summary>
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/// 返回在min和max之间的随机数(包括min和max)
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/// </summary>
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/// <param name="min">最小数</param>
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/// <param name="max">最大数</param>
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/// <returns>随机数</returns>
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public static int RandomNumber(int min, int max)
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{
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Random _Random = new Random();
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//线程休眠20毫秒
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System.Threading.Thread.Sleep(20);
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return _Random.Next(min, max + 1);
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}
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/// <summary>
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/// 返回随机数字+大小写英文//比较 字段后+collate Chinese_PRC_CS_AS_WS
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/// </summary>
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/// <param name="Length">长度</param>
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/// <returns></returns>
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public static string RandomBytes(int Length)
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{
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string st = "";
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Random _Random = new Random();
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//线程休眠20毫秒
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System.Threading.Thread.Sleep(20);
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string[] chars = new string[62] { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
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int lan = chars.Length;
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Random rd = new Random();
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for (int i = 0; i < Length; i++)
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{
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int t = rd.Next(1, lan);
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st += chars[t-1];
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}
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string str = st;
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return str;
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}
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/// <summary>
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/// 返回随机数字+大小写英文//比较 字段后+collate Chinese_PRC_CS_AS_WS
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/// </summary>
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/// <param name="Length">长度</param>
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/// <returns></returns>
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public static string RandomStringBig(int Length)
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{
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string st = "";
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Random _Random = new Random();
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//线程休眠20毫秒
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System.Threading.Thread.Sleep(20);
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string[] chars = new string[36] { "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "0", "1", "2", "3", "4", "5", "6", "7", "8", "9" };
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int lan = chars.Length;
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Random rd = new Random();
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for (int i = 0; i < Length; i++)
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{
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int t = rd.Next(1, lan);
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st += chars[t - 1];
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}
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string str = st;
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return str;
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}
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/// <summary>
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/// 返回length位数的随机数(0-9)
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/// </summary>
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/// <param name="length">位数</param>
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/// <returns>随机数</returns>
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public static int RandomNumber(int length)
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{
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Random _Random = new Random();
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StringBuilder output = new StringBuilder();
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for (int i = 0; i < length; i++)
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{
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if (i == 0)
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{
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output.Append(_Random.Next(1, 10).ToString());
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}
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else
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{
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output.Append(_Random.Next(0, 10).ToString());
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}
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}
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return int.Parse(output.ToString());
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}
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/// <summary>
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/// 返回日期的数字形式
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/// </summary>
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/// <param name="_Date">是否输出日期(年,月,日)部分</param>
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/// <param name="_Time">是否输出时间(时,分,秒,毫秒)部分</param>
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/// <returns>随机数</returns>
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public static long RandomDateTime(bool _Date, bool _Time)
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{
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if ((!_Date) && (!_Time))
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{
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throw new Exception("参数_Date和_Time必须有一个为true");
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}
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else
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{
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StringBuilder output = new StringBuilder();
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if (_Date)
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{
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output.Append(DateTime.Now.ToString("yyMMdd"));
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}
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if (_Time)
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{
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output.Append(DateTime.Now.Hour.ToString("00"));
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output.Append(DateTime.Now.Minute.ToString("00"));
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output.Append(DateTime.Now.Second.ToString("00"));
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output.Append(DateTime.Now.Millisecond.ToString());
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}
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//线程休眠20毫秒
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System.Threading.Thread.Sleep(20);
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return long.Parse(output.ToString());
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}
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}
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#region 验证码
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/// <summary>
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/// 生成验证码图片
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/// </summary>
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/// <param name="_Page">Page</param>
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/// <param name="RandomLength">验证码的位数</param>
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public static void RandomPic(System.Web.UI.Page _Page, int RandomLength)
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{
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//随机数
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int Num = MathRandom.RandomNumber(RandomLength);
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_Page.Session["WRandomNum"] = Num;
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//创建Bmp位图
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Bitmap bitMapImage = new Bitmap(RandomLength * 13 + 16, 24);
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Graphics graphicImage = Graphics.FromImage(bitMapImage);
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//设置画笔的输出质量
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graphicImage.SmoothingMode = SmoothingMode.HighSpeed;
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//添加文本字符串
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graphicImage.DrawString(Num.ToString(), new Font("黑体", 18, FontStyle.Bold), new SolidBrush(Color.Red), new Point(2, 0));
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//设置图像输出的格式
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_Page.Response.ContentType = "image/jpeg";
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//清空输出数据
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_Page.Response.Clear();
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//保存数据流
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bitMapImage.Save(_Page.Response.OutputStream, ImageFormat.Jpeg);
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//释放占用的资源
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graphicImage.Dispose();
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bitMapImage.Dispose();
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}
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/// <summary>
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/// 判断输入验证码和图片验证码是否相等,必须先用RandomPic生成验证码图片
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/// </summary>
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/// <param name="_Page">Page</param>
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/// <param name="MyNumber">输入的验证码</param>
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/// <returns>不相等返回true,相等返回false</returns>
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public static bool IsRandomWrong(System.Web.UI.Page _Page, string MyNumber)
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{
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if (_Page.Session["WRandomNum"] != null)
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{
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if (MyNumber.Trim().Equals(_Page.Session["WRandomNum"].ToString()))
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{
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//相等
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return false;
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}
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else
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{
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//不相等
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return true;
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}
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}
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else
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{
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//异常
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return false;
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}
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}
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#endregion
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}
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}
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