生成随机字符串的工具类：
/// <summary>
/// 随机字符串工具类
/// </summary>
public class RandomTools
{ /// <summary>
/// 随机系数
/// </summary>
public static int _RandIndex = ; #region 获取某个区间的一个随机数
/// <summary>
/// 获取某个区间的一个随机数
/// </summary>
/// <param name="minimum">开始区间</param>
/// <param name="maximum">结束区间</param>
/// <param name="length">小数点的位数</param>
/// <param name="isSleep">是否线程睡眠</param>
/// <param name="millisecondsTimeout">线程时间</param>
/// <returns>返回某个区间的一个随机数</returns>
public double GetRandomNumber(double minimum, double maximum, int length, bool isSleep = false, int millisecondsTimeout = )
{
if (isSleep)
{
System.Threading.Thread.Sleep(millisecondsTimeout);
}
Random random = new Random();
return Math.Round((random.NextDouble() * (maximum - minimum) + minimum), length);
}
#endregion #region 生成数字随机数【随机数大小有区间限制】
/// <summary>
/// 数字随机数
/// </summary>
/// <param name="minNum">随机数的最小值</param>
/// <param name="maxNum">随机数的最大值</param>
/// <returns>从多少到多少之间的数据 包括开始不包括结束</returns>
public static int RndInt(int minNum, int maxNum)
{
if (_RandIndex >= ) _RandIndex = ;
Random rnd = new Random(DateTime.Now.Millisecond + _RandIndex);
_RandIndex++;
return rnd.Next(minNum, maxNum);
} public static IList<int> RndInt(int num1, int num2, int len)
{
IList<int> list = new List<int>();
for (int i = ; i < len; i++) list.Add(RndInt(num1, num2));
return list;
} public static IList<int> RndInt(int len)
{
IList<int> list = RndInt(, int.MaxValue, len);
return list;
}
#endregion #region 生成数字随机数【随机数有长度的限制】
/// <summary>
/// 数字随机数
/// </summary>
/// <param name="length">生成长度</param>
/// <returns>返回指定长度的数字随机串</returns>
public static string RndNum(int length)
{
if (_RandIndex >= ) _RandIndex = ;
char[] arrChar = new char[] { '', '', '', '', '', '', '', '', '', '' };
StringBuilder num = new StringBuilder();
Random rnd = new Random(DateTime.Now.Millisecond + _RandIndex);
for (int i = ; i < length; i++)
{
num.Append(arrChar[rnd.Next(, )].ToString());
}
return num.ToString();
}
#endregion #region 生成日期随机字符串
/// <summary>
/// 日期随机函数
/// </summary>
/// <returns>返回日期随机串</returns>
public static string RndDateStr()
{
return DateTime.Now.ToString("yyyyMMddHHmmssfff") + RandomTools.RndInt(, ).ToString();
}
public static IList<string> RndDateStr(int len)
{
IList<string> list = new List<string>();
for (int i = ; i < len; i++) list.Add(RndDateStr());
return list;
} #endregion #region 生成数字和字母的随机字符串
/// <summary>
/// 数字和字母随机数
/// </summary>
/// <param name="length">生成长度</param>
/// <returns>返回指定长度的数字和字母的随机串</returns>
public static string RndCode(int length)
{
if (_RandIndex >= ) _RandIndex = ;
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'};
System.Text.StringBuilder num = new System.Text.StringBuilder();
Random rnd = new Random(DateTime.Now.Millisecond + _RandIndex);
for (int i = ; i < length; i++)
{
num.Append(arrChar[rnd.Next(, arrChar.Length)].ToString());
}
return num.ToString();
}
public static IList<string> RndCodeList(int len)
{
IList<string> list = new List<string>();
for (int i = ; i < len; i++) list.Add(RndCode(len));
return list;
}
#endregion #region 生成字母的随机字符串
/// <summary>
/// 字母随机数
/// </summary>
/// <param name="length">生成长度</param>
/// <returns>返回指定长度的字母随机数</returns>
public static string RndLetter(int length)
{
if (_RandIndex >= ) _RandIndex = ;
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 + _RandIndex);
for (int i = ; i < length; i++)
{
num.Append(arrChar[rnd.Next(, arrChar.Length)].ToString());
}
return num.ToString();
}
public static IList<string> RndLetterList(int len)
{
IList<string> list = new List<string>();
for (int i = ; i < len; i++) list.Add(RndLetter(len));
return list;
}
#endregion #region GetGuid
/// <summary>
/// 生成GUID
/// </summary>
/// <returns></returns>
public static string GetGuid()
{
System.Guid g = System.Guid.NewGuid();
return g.ToString();
}
public static IList<string> GetGuid(int len)
{
IList<string> list = new List<string>();
for (int i = ; i < len; i++) list.Add(GetGuid());
return list;
}
#endregion }