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  • c# 获取随机数字/字符/时间

    using System;
    using System.Text;
    
    namespace HuaTong.General.Utility
    {
        /// <summary>
        /// 随机字符/数字
        /// </summary>
        public static class Randoms
        {
            static Random rd = new Random();
            static DateTime _minDate = new DateTime(1990, 1, 1);
            static DateTime _maxDate = DateTime.Now.Date;
    
            /// <summary>
            /// 随机int
            /// </summary>
            /// <returns></returns>
            public static int RandomNumber()
            {
                return RandomNumber(0, int.MaxValue);
            }
            /// <summary>
            /// 随机int
            /// </summary>
            /// <returns></returns>
            public static int RandomNumber(int min, int max)
            {
                return rd.Next(min, max);
            }
    
            /// <summary>
            /// 随机string
            /// </summary>
            /// <returns></returns>
            public static string RandomString(int size, bool isNum = false, int isLower = -1)
            {
                StringBuilder builder = new StringBuilder();
                char ch = '0';
    
                for (int i = 0; i < size; i++)
                {
                    if (isNum)
                    {
                        ch = Convert.ToChar(Convert.ToInt32(9 * rd.NextDouble() + 48));
                    }
                    else
                    {
                        if (isLower == -1)
                        {
                            int index = Convert.ToInt32(size * rd.NextDouble()) % 2 == 0 ? 65 : 97;
                            ch = Convert.ToChar(Convert.ToInt32(25 * rd.NextDouble() + index));
                        }
                        else if (isLower == 0)
                        {
                            ch = Convert.ToChar(Convert.ToInt32(25 * rd.NextDouble() + 65));
                        }
                        else if (isLower > 0)
                        {
                            ch = Convert.ToChar(Convert.ToInt32(25 * rd.NextDouble() + 97));
                        }
                    }
                    builder.Append(ch);
                }
    
                return builder.ToString();
            }
    
            /// <summary>
            /// 随机datetime
            /// </summary>
            /// <returns></returns>
            public static DateTime RandomDate()
            {
                return RandomDate(_minDate, _maxDate);
            }
            /// <summary>
            /// 随机datetime
            /// </summary>
            /// <returns></returns>
            public static DateTime RandomDate(DateTime minDate, DateTime maxDate)
            {
                int totalDays = (int)((TimeSpan)maxDate.Subtract(minDate)).TotalDays;
                int randomDays = rd.Next(0, totalDays);
                return minDate.AddDays(randomDays);
            }
    
            /// <summary>
            /// 随机bool
            /// </summary>
            /// <returns></returns>
            public static bool RandomBoolean()
            {
                return ((DateTime.Now.Second % 2) > 0);
            }
    
            /// <summary>
            /// 随机char
            /// </summary>
            /// <returns></returns>
            public static char RandomChar()
            {
                return Convert.ToChar(Convert.ToInt32(26 * rd.NextDouble() + 64));
            }
    
            /// <summary>
            /// 随机byte
            /// </summary>
            /// <returns></returns>
            public static byte RandomByte()
            {
                return RandomByte(0, byte.MaxValue);
            }
            /// <summary>
            /// 随机byte
            /// </summary>
            /// <returns></returns>
            public static byte RandomByte(byte min, byte max)
            {
                return (byte)RandomNumber((int)min, (int)max);
            }
    
            /// <summary>
            /// 随机shrot
            /// </summary>
            /// <returns></returns>
            public static short RandomShort()
            {
                return RandomShort(0, short.MaxValue);
            }
            /// <summary>
            /// 随机short
            /// </summary>
    
    
            /// <returns></returns>
            public static short RandomShort(short min, short max)
            {
                return (short)RandomNumber((int)min, (int)max);
            }
        }
    }
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  • 原文地址:https://www.cnblogs.com/password1/p/5870765.html
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