根据复选框值是选中还是notC#，将多个复选框值添加到标签

Question

好的，我有8-10个复选框和单选按钮，我需要对分配给它们的双精度值求和。唯一的问题是，我只想检查一些框，而不是所有框。如果你能帮我，那就太好了。此外，我的代码上的任何指针也会有所帮助

    double SpringMix = 2.00;
    double Avocado = 1.50;
    double Beans = 2.00;
    double Cheese = 2.00;
    double Tomato = 1.50;
    double HoneyMustard = 2.00;
    double Ranch = 2.00;
    double Italian = 2.00;
    double BlueCheese = 2.00;

    double FoodCost;

我使用if语句来查看是否选中了复选框。我需要一种方法来添加他们所有取决于他们是否被选中。

public double TotalOrderCost()
    {
        if (cbSpringMix.Checked)
        {
            FoodCost + 2.00;
        }
        if (cbAvocado.Checked)
        {
            FoodCost + 1.50;
        }
        if (cbBeans.Checked)
        {
            FoodCost + 2.00;
        }
        if (cbCheese.Checked)
        {

Answer 1

我有这个版本作为解决方案：

    private readonly Dictionary<CheckBox, double> mapping;

    public MainWindow()
    {
        InitializeComponent();
        mapping = new Dictionary<CheckBox, double>
        {
            {cbBean, 2d},
            {cbSpringMix, 2d}
            //...
        };
    }

    public double TotalOrderCost()
    {
        double foodCost = 0d;
        foreach (KeyValuePair<CheckBox, double> keyValuePair in mapping)
        {
            if (keyValuePair.Key.Checked)
            {
                foodCost += keyValuePair.Value;
            }
        }
        return foodCost;
    }

TotalOrderCost的LINQ版本：

    public double TotalOrderCost()
    {
        return mapping.Where(keyValuePair => keyValuePair.Key.Checked).Sum(keyValuePair => keyValuePair.Value);
    }

您可以添加更多的组合框，而无需修改代码的多个位置。

Answer 2

这应该会有帮助。我编写了一个简单的控制台应用程序来演示如何做到这一点。它看起来比实际复杂得多，这只是因为我必须在其中放入额外的东西来模拟Sql或您可能使用的任何东西。我只关注食品类和配料类。它们主要是如何设置的。另外，看一下静态void main的底部，看看我是如何调用在食品类中创建的方法的。我已经更新了区域和注释，以使其更容易阅读。

class Program
{
    static void Main(string[] args)
    {

        #region SimulatedDb
        // Technically a Food object from the Database

        var myFood = new Food() { Name = "Sub", Ingredients = new List<IngredientViewModel>(), Price = 8.00 };

        // Technically Ingredients from the Database

        var cbSpringMixIn = new Ingredient() { Name = "Spring Mix", Price = 2.00 };
        var cbAvacodoIn = new Ingredient() { Name = "Avacodo", Price = 1.50 };
        var cbBeansIn = new Ingredient() { Name = "Beans", Price = 2.00 };
        #endregion

        // This would actually be in your code
        // You would probably just do a for each statement to turn all of these into 
        // Objects and add them to the list of available ingredients

        var cbSpringMix = new IngredientViewModel(cbSpringMixIn);
        var cbAvacodo = new IngredientViewModel(cbAvacodoIn);
        var cbBeans = new IngredientViewModel(cbBeansIn);

        #region SimulatedUserInterface
        Console.WriteLine("What would you like on your {0} ({1:C})", myFood.Name, myFood.Price);
        Console.WriteLine();
        Console.WriteLine("Would you like {0} ({1:C})", cbSpringMix.Name, cbSpringMix.Price);
        Console.WriteLine("yes or no");
        var answer = Console.ReadLine();
        if (answer == "yes")
        {
            cbSpringMix.Selected = true;
        }
        Console.WriteLine();
        Console.WriteLine("Would you like {0} ({1:C})", cbAvacodo.Name, cbAvacodo.Price);
        Console.WriteLine("yes or no");
        var answer1 = Console.ReadLine();
        if (answer1 == "yes")
        {
            cbAvacodo.Selected = true;
        }
        Console.WriteLine();
        Console.WriteLine("Would you like {0} ({1:C})", cbBeans.Name, cbBeans.Price);
        Console.WriteLine("yes or no");
        var answer2 = Console.ReadLine();
        if (answer2 == "yes")
        {
            cbBeans.Selected = true;
        }
        #endregion

        // This would actually be in your code
        // You would probably just do a for each statement to turn all of these into 
        // Objects and add them to the list of available ingredients

        myFood.Ingredients.Add(cbAvacodo);
        myFood.Ingredients.Add(cbBeans);
        myFood.Ingredients.Add(cbSpringMix);

        #region SimulatedUserInterfaceContinued

        Console.WriteLine("You are ready to check out! Press any key to continue...");
        var checkout = Console.ReadLine();

        Console.Write("You have ordered a {0} with ", myFood.Name);
        foreach (var ingredient in myFood.GetSelectedNames())
        {
            Console.Write(ingredient + " ");
        }
        Console.WriteLine();

        Console.WriteLine("Your Final Price is:");
        Console.WriteLine(String.Format("{0:C}", myFood.GetFullPrice()));
        Console.ReadLine();
        #endregion


    }
    public class Food
    {
        public Food()
        {

        }
        public IEnumerable<string> GetSelectedNames()
        {
            return (
                from f in this.Ingredients
                where f.Selected
                select f.Name).ToList();
        }
        public IEnumerable<double> GetSelectedValues()
        {
            return (
                from f in this.Ingredients
                where f.Selected
                select f.Price).ToList();
        }
        public double GetFullPrice()
        {
            var selectedIngredients = GetSelectedValues();
            return selectedIngredients.Sum() + this.Price;
        }
        public string Name { get; set; }
        public double Price { get; set; }

        public virtual List<IngredientViewModel> Ingredients { get; set; }

    }
    public class IngredientViewModel
    {
        public IngredientViewModel(Ingredient ingredient)
        {
            this.Name = ingredient.Name;
            this.Price = ingredient.Price;
            this.Selected = false;
        }
        public string Name { get; set; }
        public double Price { get; set; }
        public bool Selected { get; set; }

    }
    public class Ingredient
    {
        public string Name { get; set; }
        public double Price { get; set; }

    }


}

}