C#中唯一的4位随机数 [英] Unique 4 digit random number in C#

问题描述

我想生成一个唯一的4位随机数.这是我尝试过的以下代码:

I want to generate an unique 4 digit random number. This is the below code what I have tried:

用于生成随机数的代码

//Generate RandomNo
public int GenerateRandomNo()
{
    int _min = 0000;
    int _max = 9999;
    Random _rdm = new Random();
    return _rdm.Next(_min, _max);
}

问题是我收到了一个随机编号，其值为241，它不是4位数字.代码有问题吗?

The problem is I have received a random no with value 241 which is not a 4 digit number. Is there any problems with the code?

推荐答案

//Generate RandomNo
public int GenerateRandomNo()
{
    int _min = 1000;
    int _max = 9999;
    Random _rdm = new Random();
    return _rdm.Next(_min, _max);
}

您需要输入4位数字，以1000开头

you need a 4 digit code, start with 1000

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