关键代码：
/// <summary>/// 生成随机字符串/// </summary>/// <param name="random">Random</param>/// <param name="size">字符串长度</param>/// <param name="lowerCase">字符串是小写</param>/// <returns>随机字符串</returns>publicstaticstringNetxtString(thisRandom random,intsize,boollowerCase)
{
StringBuilder _builder =newStringBuilder(size);int_startChar = lowerCase ? 97 : 65;//65 = A / 97 = afor(inti = 0; i < size; i++)
_builder.Append((char)(26 * random.NextDouble() + _startChar));return_builder.ToString();
}
测试代码：
staticvoidMain(string[] args)
{try{
Random _random =newRandom();for(inti = 0; i < 10; i++)
{
Console.WriteLine(_random.NetxtString(4,false));
}
}catch(Exception ex)
{
Console.WriteLine(ex.Message);
}finally{
Console.ReadLine();
}
}
测试结果：
二，关键代码：
/// <summary>/// 0~9 A~Z字符串/// </summary>publicstaticstringRandomString_09AZ ="0123456789ABCDEFGHIJKMLNOPQRSTUVWXYZ";/// <summary>/// 依据指定字符串来生成随机字符串/// </summary>/// <param name="random">Random</param>/// <param name="randomString">指定字符串</param>/// <param name="size">字符串长度</param>/// <param name="lowerCase">字符串是小写</param>/// <returns>随机字符串</returns>publicstaticstringNetxtString(thisRandom random,stringrandomString,intsize,boollowerCase)
{string_nextString =string.Empty;if(random !=null&& !string.IsNullOrEmpty(randomString))
{
StringBuilder _builder =newStringBuilder(size);int_maxCount = randomString.Length - 1;for(inti = 0; i < size; i++)
{int_number = random.Next(0, _maxCount);
_builder.Append(randomString[_number]);
}
_nextString = _builder.ToString();
}returnlowerCase ? _nextString.ToLower() : _nextString.ToUpper();
}
测试代码：
staticvoidMain(string[] args)
{try{
Random _random =newRandom();string_ramdomString = RandomToolV2.RandomString_09AZ;for(inti = 0; i < 20; i++)
{// Console.WriteLine(_random.NetxtString(4, false));Console.WriteLine(_random.NetxtString(_ramdomString, 4,false));
}
}catch(Exception ex)
{
Console.WriteLine(ex.Message);
}finally{
Console.ReadLine();
}
}
代码效果：
希望有所帮助！