如何在C#中随机化种子 [英] How to randomize seed in C#

问题描述

我需要在C#中生成随机整数.我正在使用时钟时间设置seed.但是，由于rnd.Next()函数可能需要不到一毫秒的时间，因此如果必须生成一个int列表，则此方法将无效.

I need to generate random int in C#. I am using clock time to set the seend. However, as the rnd.Next() function may take less than a millisecond, this does not work if one has to generate a list of ints.

        for( int i=0; i<5; i++) {
            int max_val = 10; // max value
            var rnd = new Random(DateTime.Now.Millisecond);
            int randind = rnd.Next(0, max_val);
            Console.WriteLine(randind);
        }

输出:
1个 5 5 5 5

Output:
1 5 5 5 5

如何在不增加丑陋睡眠的情况下以干净的方式随机分配种子?

How can one randomise the seed in a clean way without adding an ugly sleep?

推荐答案

在循环外部创建您的Random对象，并且不提供种子参数-将会为您选择一个.通过将其移出循环，rnd.Next()仍然会为您提供随机序列.

Create your Randomobject outside the loop and don't provide the seed parameter -- one will be picked for you. By taking it out of the loop, rnd.Next() will give you a random sequence anyway.

   var rnd = new Random();     
   for( int i=0; i<5; i++) {
        int max_val = 10; // max value
        int randind = rnd.Next(0, max_val);
        Console.WriteLine(randind);
    }

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