c# - 如何避免 300 个案例的开关阻塞？

Question

我正在尝试将 300 个挑战添加到我的程序中，但仅在 CompletionValue.IsChecked = false 时才显示它们；

如果您正在创建这个程序。您将如何存储挑战？我正在使用开关，但有 300 个案例太过分了，有没有更好的方法？

非常感谢任何关于改进代码的建议。我对此有些陌生。

    Random rand = new Random();
    // Constructor
    public MainPage()
    {
        InitializeComponent();
        AnswerValue.Visibility = Visibility.Collapsed;
        Load();

    }


    private void Load()
    {
        int random = rand.Next(1, 4);
        switch (random)
        {
            case 1:
                Challenge1();
                break;
            case 2:
                Challenge2();
                break;
            case 3:
                Challenge3();
                break;
        }
    }

    private void Challenge1()
    {
        DifficultyValue.Text = "20%";
        CompletionValue.IsChecked = false;
        TitleValue.Text = "Chicken or Egg?";
        QuestionValue.Text = "Can you answer the ancient question: Which came first the chicken of the egg?";
        bmp.UriSource = new Uri("Images/Challenge1.png", UriKind.Relative);
        ImageValue.Source = bmp;
        ImageValue.Visibility = Visibility.Visible;
        ResourceValue.Text = "Resource: Brain Games";
        AnswerValue.Text = "The Egg. According to paleontologists, reptiles and dinosaurs existed long before birds and chickens.  Fossilized eggs dating back on hundred millions years have been uncovered. Thus it can be said that eggs came before chickens.";

    }

    private void Challenge2()
    {
        DifficultyValue.Text = "25%";
        CompletionValue.IsChecked = false;
        TitleValue.Text = "Halving Seven";
        QuestionValue.Text = "Can you prove that seven is half of twelve?";
        bmp.UriSource = new Uri("Images/Challenge2.png", UriKind.Relative);
        ImageValue.Source = bmp;
        ImageValue.Visibility = Visibility.Visible;
        ResourceValue.Text = "Resource: Yahoo Questions";
        AnswerValue.Text = "Roman numeral for 12 - XII \n Cut the roman numeral in half. you will get VII, which is 7.";

    }

    private void Challenge3()
    {
        DifficultyValue.Text = "25%";
        CompletionValue.IsChecked = false;
        TitleValue.Text = "Three-coin flip";
        QuestionValue.Text = "You ask a friend about probability, and he tells you the following: The odds of three tossed coins turning up all heads or all tails is one in two, that is, fifty-fifty. That’s because anytime you toss three coins, at least two must match, either two heads or two tails.  So that means the third coin—which is equally likely to be heads or tails—determines the odds.” Is your friend right? If not, what are the odds of three tossed coins turning up all heads or all tails?";
        bmp.UriSource = new Uri("Images/Challenge3.png", UriKind.Relative);
        ImageValue.Source = bmp;
        ImageValue.Visibility = Visibility.Visible;
        ResourceValue.Text = "Resource: Brain Games";
        AnswerValue.Text = "Answer will be available soon";
    }

Answer 1

你们的挑战看起来非常相似，对吧？在这种情况下，您想要提取出一个通用数据结构，并将每个挑战表示为一条数据。

通过统一表示您的挑战，您可以根据特定挑战 ID 的挑战数据设置 UI。

总是可以将您的数据移动到 XML 文件、JSON 文件或数据库中，但首先要看看简单的 C# 解决方案是否适合您:

// Note: This example is simplified for readability

// Here is the common data structure that can represent all challenges
private class Challenge
{
    public string Title { get; set; }
    public string Question { get; set; }
    public string ImagePath { get; set; }
}

// All of the challenges are defined right here, as simple data
private Challenge[] _allChallenges = new Challenge[]
{
    new Challenge
    {
        Title = "Chicken or Egg?",
        Question = "Can you answer the ancient question: Which came first the chicken of the egg?",
        ImagePath = "Images/Challenge1.png",
    },
    new Challenge
    {
        Title = "Halving Seven?",
        Question = "Can you prove that seven is half of twelve?",
        ImagePath = "Images/Challenge1.png",
    },
}

// Choosing challenges is as simple as indexing into the array
private void Load()
{
    int random = rand.Next(1, 4);
    Challenge chosenChallenge = _allChallenges[random];
    LoadChallenge(chosenChallenge);
}

// Setting up the UI for a challenge means extracting information from the data structure
private void LoadChallenge(Challenge chosenChallenge)
{
    TitleValue.Text = chosenChallenge.Title;
    QuestionValue.Text = chosenChallenge.Text;
    bmp.UriSource = new Uri(chosenChallenge.ImagePath, UriKind.Relative);
    ImageValue.Source = bmp;
    ImageValue.Visibility = Visibility.Visible;
}

您可以将其视为 declarative programming 的一种形式.您的程序的一个重要部分，即挑战本身，已从命令式语句(设置 UI 属性)转换为非常简单的数据声明。

通过进行这种转换，您甚至可以检查每个挑战以确保所有部分都已填写。然后您将确保为您的 300 个挑战中的每一个都设置了标题、问题、资源、答案等。