為什么我從列表中得到重復的對象 <E> 在C＃中？

Question

這是我的問題函數，我將數據集合發送到ShuffledList函數以便一次獲取一行

  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;

    }

但是這個函數有時會返回重復的對象

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
    }

請注意，我正在嘗試制作多選游戲，並且效果很好，但有時會重復同樣的問題，如果您能幫助我解決這個問題，

Answer 1

我認為您在可重復洗牌中遇到了問題。 嘗試存儲一次隨機播放的列表，以防止在游戲過程中兩次生成相同的問題位置時發生情況

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;

}