79 lines
3.2 KiB
C#
79 lines
3.2 KiB
C#
|
using System;
|
|||
|
|
using System.Text;
|
|||
|
|
|
|||
|
|
namespace APT.Infrastructure.Core
|
|||
|
|
{
|
|||
|
|
/// <summary>
|
|||
|
|
/// 类型<see cref="System.Random"/>扩展方法类
|
|||
|
|
/// </summary>
|
|||
|
|
public static class RandomExtensions
|
|||
|
|
{
|
|||
|
|
static char[] _numberPattern = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };
|
|||
|
|
static char[] _letterPattern = 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[] _letterAndNumberPattern = new char[] { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
|
|||
|
|
'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>
|
|||
|
|
/// 获取指定的长度的随机数字字符串
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="random"></param>
|
|||
|
|
/// <param name="length">要获取随机数长度</param>
|
|||
|
|
/// <returns>指定长度的随机数字符串</returns>
|
|||
|
|
public static string NextNumberString(this Random random, int length)
|
|||
|
|
{
|
|||
|
|
if (length < 0)
|
|||
|
|
throw new ArgumentOutOfRangeException("length");
|
|||
|
|
int n = _numberPattern.Length;
|
|||
|
|
StringBuilder randomBuilder = new StringBuilder();
|
|||
|
|
for (int i = 0; i < length; i++)
|
|||
|
|
{
|
|||
|
|
int rnd = random.Next(0, n);
|
|||
|
|
randomBuilder.Append(_numberPattern[rnd]);
|
|||
|
|
}
|
|||
|
|
return randomBuilder.ToString();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// 获取指定的长度的随机字母字符串
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="random"></param>
|
|||
|
|
/// <param name="length">要获取随机数长度</param>
|
|||
|
|
/// <returns>指定长度的随机字母组成字符串</returns>
|
|||
|
|
public static string NextLetterString(this Random random, int length)
|
|||
|
|
{
|
|||
|
|
if (length < 0)
|
|||
|
|
{
|
|||
|
|
throw new ArgumentOutOfRangeException("length");
|
|||
|
|
}
|
|||
|
|
int n = _letterPattern.Length;
|
|||
|
|
StringBuilder randomBuilder = new StringBuilder();
|
|||
|
|
for (int i = 0; i < length; i++)
|
|||
|
|
{
|
|||
|
|
int rnd = random.Next(0, n);
|
|||
|
|
randomBuilder.Append(_letterPattern[rnd]);
|
|||
|
|
}
|
|||
|
|
return randomBuilder.ToString();
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
/// <summary>
|
|||
|
|
/// 获取指定的长度的随机字母和数字字符串
|
|||
|
|
/// </summary>
|
|||
|
|
/// <param name="random"></param>
|
|||
|
|
/// <param name="length">要获取随机数长度</param>
|
|||
|
|
/// <returns>指定长度的随机字母和数字组成字符串</returns>
|
|||
|
|
public static string NextLetterAndNumberString(this Random random, int length)
|
|||
|
|
{
|
|||
|
|
if (length < 0)
|
|||
|
|
throw new ArgumentOutOfRangeException("length");
|
|||
|
|
int n = _letterAndNumberPattern.Length;
|
|||
|
|
StringBuilder randomBuilder = new StringBuilder();
|
|||
|
|
for (int i = 0; i < length; i++)
|
|||
|
|
{
|
|||
|
|
int rnd = random.Next(0, n);
|
|||
|
|
randomBuilder.Append(_letterAndNumberPattern[rnd]);
|
|||
|
|
}
|
|||
|
|
return randomBuilder.ToString();
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
}
|