为什么我从 C# 中的 List<E> 得到重复的对象？

Question

这是我的问题函数，我将数据集合发送到 ShuffledList 函数以便一次获取一行

  private void nextQuestion_Question()
    {
            ql1 = ShuffleList(ql1);
            currentQuestion_List = ql1.ElementAt(0);
            //ql1.RemoveAt(0);

            txtQ.Text = currentQuestion_List.text;
            btnA.Text = currentQuestion_List.a;
            btnB.Text = currentQuestion_List.b;
            btnC.Text = currentQuestion_List.c;
            btnD.Text = currentQuestion_List.d;

    }

但这个函数有时会返回重复的对象

private List<E> ShuffleList<E>(List<E> inputList)
    {
        List<E> randomList = new List<E>();
        Random r = new Random();
        int randomIndex = 0;  
               while (inputList.Count>0)
                {
                   randomIndex = r.Next(inputList.Count); //Choose a random object in the list
                    randomList.Add(inputList[randomIndex]); //add it to the new, random list
                    inputList.RemoveAt(randomIndex); //remove to avoid duplicates          
                }
        return randomList; //return the new random list
    }

请注意，我正在尝试制作一个多选游戏，它运行良好，但有时会重复相同的问题 请帮我解决这个问题

Answer 1

我认为你的重复洗牌有问题。尝试存储一次打乱列表，以防止在游戏会话期间两次生成相同的问题位置的情况

bool listShuffled = false;
private void nextQuestion_Question()
{
        if(!listShuffled){
            listShuffled = true;
            ql1 = ShuffleList(ql1);
        }

        currentQuestion_List = ql1.ElementAt(0);
        //ql1.RemoveAt(0);

        txtQ.Text = currentQuestion_List.text;
        btnA.Text = currentQuestion_List.a;
        btnB.Text = currentQuestion_List.b;
        btnC.Text = currentQuestion_List.c;
        btnD.Text = currentQuestion_List.d;

}