c# - 如何在C#数组字符串中选择5位随机数？

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How can I generate random 8 character, alphanumeric strings in C#?




我有字母名称的数组。现在我需要随机选择5个字符。如果我使用以下代码，我只能选择一个字符。如何在给定的数组字符串中随机选择5位数字？

    String[] letters = { "1", "2", "3", "4", "5", "6", "7", "8", "9", "0", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q" };
    Random rand = new Random();
    String number = letters[rand.Next(1,10)];

Answer 1

string number = 
    string.Concat(Enumerable.Range(0,5).Select(i => 
        letters[rand.Next(0, 10)]));

当然，给定数组的内容，这在功能上等效于：

string number = rand.Next(0, 100000).ToString("D5");