c# - 如何获得带有空格和混合大小写的随机字符串？

Question

我需要生成一个包含空格和大小写混合的随机字符串。

This是我到目前为止所得到的:

    /// <summary>
    /// The Typing monkey generates random strings - can't be static 'cause it's a monkey.
    /// </summary>
    /// <remarks>
    /// If you wait long enough it will eventually produce Shakespeare.
    /// </remarks>
    class TypingMonkey
    {
        /// <summary>
        /// The Typing Monkey Generates a random string with the given length.
        /// </summary>
        /// <param name="size">Size of the string</param>
        /// <returns>Random string</returns>
        public string TypeAway(int size)
        {
            StringBuilder builder = new StringBuilder();
            Random random = new Random();
            char ch;

            for (int i = 0; i < size; i++)
            {
                ch = Convert.ToChar(Convert.ToInt32(Math.Floor(26 * random.NextDouble() + 65)));
                builder.Append(ch);
            }

            return builder.ToString();
        }
    }

我只得到没有空格的大写字符串 - 我相信调整应该非常简单，以便在汤中混合大小写和空格。

非常感谢任何帮助!

Answer 1

最简单的方法是简单地创建一个具有以下值的字符串:

private readonly string legalCharacters = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";

然后使用RNG来访问这个字符串中的一个随机元素:

public string TypeAway(int size)
{
    StringBuilder builder = new StringBuilder();
    Random random = new Random();
    char ch;

    for (int i = 0; i < size; i++)
    {
        ch = legalCharacters[random.Next(0, legalCharacters.Length)];
        builder.Append(ch);
    }

    return builder.ToString();
}