c# - 我可以称之为依赖注入(inject)吗？

Question

我是依赖注入(inject)的新手，我正在尝试弄明白。 假设我有课 book :

class Book
{
    public String Author { get; set; }
    public String Title { get; set; }
    private int Quantity {get;set;}

    public Book(String aut, String pav, int qua)
    {
        this.Author = aut;
        this.Title = pav;
        this.Quantity = qua;
    }
}

然后是其他有类型的课本

class BookWithType
{
    public Book Book { get; set; }
    public String Type { get; set; }

    public BookWithType(Book book, String type)
    {
        this.Book = book;
        this.Type = type;
    }
 }

当我在 BookWithType 构造函数中注入(inject) Book 对象时，我可以说这是一个依赖注入(inject)吗？

Answer 1

您不会使用数据传输对象创建依赖注入(inject)。它更像是:

public class Book
{
    public String Author { get; set; }
    public String Title { get; set; }
    public int Pages {get;set;}
    public string Type {get;set;}

    public Book(String aut, String pav, int pages, string type)
    {
        this.Author = aut;
        this.Title = pav;
        this.Pages = pages;
        this.Type = type;
    }
}

然后是某种显示层，例如:

public class BookView
{
    private IBookRetriever _bookRetriever;

    public BookWithType(IBookRetriever bookRetriever)
    {
        _bookRetriever = bookRetriever;
    }
    public Book GetBookWithType(string type) {
        return _bookRetriever.GetBookOfType(type);
    }
}

哪里有 IBookRetriever...

public interface IBookRetriever {
    Book GetBookOfType(string type);
}