TEAMModelOS/TEAMModelBI/Tool/Extension/GenerateRandom.cs

using System;
using System.Linq;
using System.Security.Cryptography;
using System.Text;

namespace TEAMModelBI.Tool.Extension
{
    public static class GenerateRandom
    {
        static char[] ch_Number = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
        static char[] ch_Upper = new char[] { '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' };
        static char[] ch_Lower = new char[] { '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' };

        /// <summary>
        /// 生成随机数字
        /// </summary>
        /// <param name="Length">生成长度</param>
        /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
        /// <returns></returns>
        public static string Number(int Length, bool Sleep = false)
        {
            if (Sleep)
                System.Threading.Thread.Sleep(3);
            string result = "";
            Random random = new Random();
            for (int i = 0; i < Length; i++)
            {
                result += random.Next(10).ToString();
            }
            return result;
        }

        /// <summary>
        /// 生成随机大写字母与数字
        /// </summary>
        /// <param name="Length">生成长度</param>
        /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
        /// <returns></returns>
        public static string StrNumberUpeper(int Length, bool Sleep = false)
        {
            if (Sleep) System.Threading.Thread.Sleep(3);
            var numUpper = ch_Number.Concat(ch_Upper).ToArray();
            StringBuilder result = new StringBuilder();
            int n = numUpper.Length;
            Random random = new Random(~unchecked((int)DateTime.Now.Ticks));
            for (int i = 0; i < Length; i++)
            {
                int rnd = random.Next(0, n);
                result.Append(numUpper[rnd]);
            }
            return result.ToString();
        }

        /// <summary>
        /// 生成随机小写字母
        /// </summary>
        /// <param name="Length">生成长度</param>
        /// <param name="Sleep">是否要在生成前将当前线程阻止以避免重复</param>
        /// <returns></returns>
        public static string StrLower(int length, bool sleep = false)
        {
            if (sleep) System.Threading.Thread.Sleep(3);
            StringBuilder result = new StringBuilder();
            int n = ch_Lower.Length;
            Random random = new Random(~unchecked((int)DateTime.Now.Ticks));
            for (int i = 0; i < length; i++)
            {
                int rnd = random.Next(0, n);
                result.Append(ch_Lower[rnd]);
            }

            return result.ToString();
        }

        /// <summary>
        /// 随机生产大小写字母和数字的随机数
        /// </summary>
        /// <param name="length">生成长度</param>
        /// <param name="sleep">是否要在生成前将当前线程阻止以避免重复</param>
        /// <returns></returns>
        public static string StrAll(int length, bool sleep = false)
        {
            if (sleep) System.Threading.Thread.Sleep(3);
            StringBuilder result = new StringBuilder();
            var temp = ch_Number.Concat(ch_Upper).ToArray();
            var allchar = ch_Number.Concat(temp).ToArray();
            int l = allchar.Length;
            Random random = new Random(~unchecked((int)DateTime.Now.Ticks));
            for (int i = 0; i < length; i++) 
            {
                int rnd = random.Next(0, l);
                result.Append(allchar[rnd]);
            }

            return result.ToString();
        }

        /// <summary>
        /// 生成随机数
        /// </summary>
        /// <param name="length">生成长度</param>
        /// <param name="sleep">是否要在生成前将当前线程阻止以避免重复</param>
        /// <param name="large">是否需要大写字母</param>
        /// <param name="small">是否需要小写字母</param>
        /// <returns></returns>
        public static string StrRandom(int length, bool sleep = false, bool large = false, bool small = false)
        {
            if (sleep) System.Threading.Thread.Sleep(3);
            char[] ch = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

            if (large == true) { ch = ch.Concat(ch_Upper).ToArray(); }
            if (small == true) { ch = ch.Concat(ch_Lower).ToArray(); }

            StringBuilder result = new StringBuilder();
            int l = ch.Length;
            Random random = new Random(~unchecked((int)DateTime.Now.Ticks));
            for (int i = 0; i < length; i++)
            {
                int rnd = random.Next(0, l);
                result.Append(ch[rnd]);
            }

            return result.ToString();
        }
    }
}