Question

List<Object> testimonials = new List<Object>();
testimonials.Add(new {
    Author = "Author 1",
    Testimonial = "Testimonial 1"
});
testimonials.Add(new {
    Author = "Author 2",
    Testimonial = "Testimonial 2"
});
testimonials.Add(new {
    Author = "Author 3",
    Testimonial = "Testimonial 3"
});

@ObjectInfo.Print(testimonials[DateTime.Now.DayOfYear % testimonials.Count].Author)

给我一个错误CS1061：'object'不包含'Author'的定义

如何从推荐书列表中仅获取作者或推荐书？

Answer 1

懒惰的方式是将“对象”切换为“动态”。或者使用A Tuple泛型类型。

但IMO你应该只是写一个听到两个属性的类：

public class Testimonial {
    public string Author {get;set;}
    public string Comment {get;set;}
}

并使用推荐列表。

另一种方法是使用类似的东西：

var arr = new[]{new{...},new{...}};

这是你的anon类型的数组，和;

string author = arr[0].Author;

工作正常。

Answer 2

使用隐式类型数组：

var arr = new[]
{
    new { Author = "Author 1", Testimonial = "Testimonial 1" },
    new { Author = "Author 2", Testimonial = "Testimonial 2" },
    new { Author = "Author 3", Testimonial = "Testimonial 3" }
};
// .ToList() if needed, however array supports indexer

string author = arr[i].Author;

如何访问匿名类型？

2 个答案: