Question

Category.cs

 using System.Collections.Generic;

 namespace DrinkAndGo1.Data.Models
 {
     public class Category
     {
         public int CategoryId { get; set; }
         public string CategoryName { get; set; }
         public string Description { get; set; }
         public List<Drink> Drinks { get; set; }
     }
 }

ICategoryRepository.cs

using DrinkAndGo1.Data.Models; 
using System.Collections.Generic;

namespace DrinkAndGo1.Data.interfaces 
{
    public interface ICategoryRepository
    {
        IEnumerable<Category> Categories { get; }
    }
}

MockCategoryRepository.cs

using DrinkAndGo1.Data.interfaces; 
using DrinkAndGo1.Data.Models; 
using System.Collections.Generic;

namespace DrinkAndGo1.Data.mocks 
{
    public class MockCategoryRepository : ICategoryRepository
    {
        public IEnumerable<Category> Categories
        {
            get
            {
                return new List<Category>
                {
                    new Category(CategoryName = "Alcoholic", Description = "All alcoholic drinks"),
                    new Category(CategoryName = "None-alcoholic", Description = "All None-alcoholic drinks")
                };
            }
        }
    } 
}

我的问题是类别和类别名称和描述标记为红色。 MockCategoryRepository.cs不识别类别类中的PROP。我知道它可以在没有构造函数的情况下识别它

Answer 1

更改这些行

new Category(CategoryName = "Alcoholic", Description = "All alcoholic drinks"),
new Category(CategoryName = "None-alcoholic", Description = "All None-alcoholic drinks")

以下内容：

new Category{CategoryName = "Alcoholic", Description = "All alcoholic drinks"},
new Category{CategoryName = "None-alcoholic", Description = "All None-alcoholic drinks"}

您正在尝试初始化属性，但是以不正确的方式编写它，如调用构造函数。 MSDN Link

Answer 2

Samvel使用对象初始化程序展示了一个很好的解决方案，但我想提出另一种选择。如果使用名称和描述初始化Category是很常见的，为什么不创建一个接受它们的构造函数？

public Category(string name, string description)
{
    // TODO: Consider renaming the property to just name, given that the type is Category
    CategoryName = name;
    Description = description;
}

然后你可以：

return new List<Category>
{
    new Category("Alcoholic", "All alcoholic drinks"),
    new Category("Non-alcoholic", "All Non-alcoholic drinks")
};

另外，C＃6还允许您更简洁地编写属性：

public IEnumerable<Category> Categories => new List<Category>
{
    new Category("Alcoholic", "All alcoholic drinks"),
    new Category("Non-alcoholic", "All Non-alcoholic drinks")
};

它不承认我的财产

2 个答案: