.net core 使用 mongodb（nosql）数据库

朴灿烈づ我的快乐病毒、 2023-03-03 05:57 15阅读 0赞

首先运行mongodb服务器

## 安装包 ##

安装MongoDB.Driver包

## 建立模型 ##

public class Book 
    { 
        // 指定该字段为 mongoddb Id
        [BsonId]
        // 指定该字段的类型为 ObjectId （24位字符串）
        [BsonRepresentation (BsonType.ObjectId)]
        public string Id {  get; set; }
    
        // 指定该字段的名称为 Name
        [BsonElement ("Name")]
        public string BookName {  get; set; }
    }

## CRUD（增删改查）服务类 ##

// 对名为 Books 的集合进行增删改查
    public class BookService
    { 
        private readonly IMongoCollection<Book> _books;
        
        public BookService()
        { 
            // 使用连接字符串连接 mongodb 服务器
            var client = new MongoClient("mongodb://localhost:27017");
            // 获取名为 BookstoreDb 的数据库
            var database = client.GetDatabase("BookstoreDb");
            // 获取名为 Books 的集合
            _books = database.GetCollection<Book>("Books");
        }
        public List<Book> Get() =>
            _books.Find(book => true).ToList();
    
        public Book Get(string id) =>
            _books.Find<Book>(book => book.Id == id).FirstOrDefault();
    
        public Book Create(Book book)
        { 
            _books.InsertOne(book);
            return book;
    	}
    
        public void Update(string id, Book bookIn) =>
            _books.ReplaceOne(book => book.Id == id, bookIn);
    
        public void Remove(Book bookIn) =>
            _books.DeleteOne(book => book.Id == bookIn.Id);
    
        public void Remove(string id) =>
            _books.DeleteOne(book => book.Id == id);
    }

## 测试控制器类 ##

[Route ("api/[controller]/[action]")]
    [ApiController]
    public class ValuesController : ControllerBase 
    { 
        private BookService _bookService {  get; }
    
        public ValuesController () 
        { 
            _bookService = new BookService ();
    	}
    
        [HttpGet]
        public ActionResult<List<Book>> Get () =>
            _bookService.Get ();
    
        [HttpGet]
        public IActionResult Create () 
        { 
            // 可以不指定 Id，创建时自动生成
            _bookService.Create (new Book () { 
                BookName = "TestName"
            });
    
            return RedirectToAction ("Get");
    	}
    
        [HttpGet]
        public IActionResult Delete (string id) 
        { 
            _bookService.Remove (id);
    
            return RedirectToAction ("Get");
        }
    }