随机函数类

using System;

using System.Data;

using System.Configuration;

using System.Web;

using System.Web.Security;

using System.Web.UI;

using System.Web.UI.WebControls;

using System.Web.UI.WebControls.WebParts;

using System.Web.UI.HtmlControls;

using System.Text;





namespace HuLangCms

{

    /// <summary>

    /// 随机函数

    /// </summary>

    public class RandomObject

    {



        #region 数字随机数

        /// <summary>

        /// 数字随机数

        /// </summary>

        /// <param name="n">生成长度</param>

        /// <returns></returns>

        public string RandNum(int n)

        {

            char[] arrChar = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

            StringBuilder num = new StringBuilder();



            Random rnd = new Random(DateTime.Now.Millisecond);



            for (int i = 0; i < n; i++)

            {

                num.Append(arrChar[rnd.Next(0, 9)].ToString());



            }



            return num.ToString();

        }

        #endregion



        #region 数字和字母随机数

        /// <summary>

        /// 数字和字母随机数

        /// </summary>

        /// <param name="n">生成长度</param>

        /// <returns></returns>

        public string RandCode(int n)

        {

            char[] arrChar = new char[]{

           'a','b','d','c','e','f','g','h','i','j','k','l','m','n','p','r','q','s','t','u','v','w','z','y','x',

           '0','1','2','3','4','5','6','7','8','9',

           'A','B','C','D','E','F','G','H','I','J','K','L','M','N','Q','P','R','T','S','V','U','W','X','Y','Z'

          };



            StringBuilder num = new StringBuilder();



            Random rnd = new Random(DateTime.Now.Millisecond);

            for (int i = 0; i < n; i++)

            {

                num.Append(arrChar[rnd.Next(0, arrChar.Length)].ToString());



            }



            return num.ToString();

        }

        #endregion



        #region 字母随机数

        /// <summary>

        /// 字母随机数

        /// </summary>

        /// <param name="n">生成长度</param>

        /// <returns></returns>

        public string RandLetter(int n)

        {

            char[] arrChar = new char[]{

            'a','b','d','c','e','f','g','h','i','j','k','l','m','n','p','r','q','s','t','u','v','w','z','y','x',

            '_',

           'A','B','C','D','E','F','G','H','I','J','K','L','M','N','Q','P','R','T','S','V','U','W','X','Y','Z'

          };



            StringBuilder num = new StringBuilder();



            Random rnd = new Random(DateTime.Now.Millisecond);

            for (int i = 0; i < n; i++)

            {

                num.Append(arrChar[rnd.Next(0, arrChar.Length)].ToString());



            }



            return num.ToString();

        }

        #endregion



        #region 日期随机函数

        /// <summary>

        /// 日期随机函数

        /// </summary>

        /// <param name="ra">长度</param>

        /// <returns></returns>

        public string DateRndName(Random ra)

        {

            DateTime d = DateTime.Now;

            string s = null, y, m, dd, h, mm, ss;

            y = d.Year.ToString();

            m = d.Month.ToString();

            if (m.Length < 2) m = "0" + m;

            dd = d.Day.ToString();

            if (dd.Length < 2) dd = "0" + dd;

            h = d.Hour.ToString();

            if (h.Length < 2) h = "0" + h;

            mm = d.Minute.ToString();

            if (mm.Length < 2) mm = "0" + mm;

            ss = d.Second.ToString();

            if (ss.Length < 2) ss = "0" + ss;

            s += y + m + dd + h + mm + ss;

            s += ra.Next(100, 999).ToString();

            return s;

        }

        #endregion



        #region 生成GUID

        /// <summary>

        /// 生成GUID

        /// </summary>

        /// <returns></returns>

        public string GetGuid()

        {

            System.Guid g = System.Guid.NewGuid();

            return g.ToString();

        }

        #endregion

    }

}