c# - 如何从方法中发送和检索

Question

我正在尝试发送和检索值，因为我的代码是面向对象的，在 Addition.xaml 中我试图发送“AddLevel”变量，它是一个 int，在 Addition.xaml 中我有:

private void pageRoot_Loaded(object sender, RoutedEventArgs e)
{
   Methods.AddLevels(AddLevel, Question1,Question2, Answer);
   QuestionText1.Text = System.Convert.ToString(Question1);
   QuestionText2.Text = System.Convert.ToString(Question2);
}

在这个方法中，我试图将 AddLevel int 变量发送到 Methods 类以确定要做什么，在 Methods 类中我有:

public static int AddLevels(int AddLevel, int Question1, int Question2, int Answer)
{
    Random rnd = new Random();

    if(AddLevel == 0 || AddLevel == 1)
    {
       Question1 = rnd.Next(0, 10);
       Question2 = rnd.Next(0, 10);
       Answer = Question1 + Question2;
    }

    return Question1;
    return Question2;
    return Answer;

}

总而言之，我试图将 AddLevel 从 Addition.xaml 发送到方法类中的 AddLevels 方法，然后我试图从该方法中检索问题 1、问题 2 和答案。我该怎么做呢？

Answer 1

一种选择是使用元组:

private void pageRoot_Loaded(object sender, RoutedEventArgs e)
{
    Tuple<int, int, int> result = Methods.AddLevels(AddLevel, Question1, Question2, Answer);
    QuestionText1.Text = System.Convert.ToString(result.Item1);
    QuestionText2.Text = System.Convert.ToString(result.Item2);
}

public static Tuple<int, int, int> AddLevels(int addLevel, int question1, int question2, int answer)
{
    if (addLevel == 0 || addLevel == 1)
    {
        Random rnd = new Random();
        question1 = rnd.Next(0, 10);
        question2 = rnd.Next(0, 10);
        answer = question1 + question2;
    }
    return Tuple.Create(question1, question2, answer);
}

另一个不太推荐的选项是使用 ref 关键字:

private void pageRoot_Loaded(object sender, RoutedEventArgs e)
{
    Methods.AddLevels(AddLevel, ref Question1, ref Question2, ref Answer);
    QuestionText1.Text = System.Convert.ToString(Question1);
    QuestionText2.Text = System.Convert.ToString(Question2);
}

public void AddLevels(int addLevel, ref int question1, ref int question2, ref int answer)
{
    if (addLevel == 0 || addLevel == 1)
    {
        Random rnd = new Random();
        question1 = rnd.Next(0, 10);
        question2 = rnd.Next(0, 10);
        answer = question1 + question2;
    }
}