ASP.NET Core MVC中构建Web API

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我是靠谱客的博主害羞皮带，这篇文章主要介绍ASP.NET Core MVC中构建Web API，现在分享给大家，希望可以做个参考。

在ASP.NET CORE MVC中，Web API是其中一个功能子集，可以直接使用MVC的特性及路由等功能。

在成功构建 ASP.NET CORE MVC项目之后，选中解决方案，先填加一个API的文件夹，填加后，选中API文件夹，

选择新建项，选择填加Web API控制器，要注意控制器在命名时，是以Controller结尾的，这个不能改，前面的随意，比如，此处以NoteController.cs为例

填加后，打开NoteController.cs,系统已经帮我们构建好了一些基础的功能，我们需要在其基础上进行一些个性化修改使其成为我们自己的代码。

复制代码

private INoteRespository _noteRespository;                        //引入note的（业务逻辑层，姑且称为业务逻辑层吧）

private INoteTypeRepository _noteTypeRepository;                  //引入notetype的（业务逻辑层，姑且称为业务逻辑层吧）

public NoteController(INoteRespository noteRespository, INoteTypeRepository noteTypeRepository)  //构造行数初始化
        {
            this._noteRespository = noteRespository;
            this._noteTypeRepository = noteTypeRepository;
        }

// GET: api/note
        [HttpGet]
        public IActionResult Get(int pageindex=1)                                     //分页获取
        {
            var pagesize = 10;
            var notes = _noteRespository.PageList(pageindex, pagesize);
            ViewBag.PageCount = notes.Item2;
            ViewBag.PageIndex = pageindex;
            var result = notes.Item1.Select(r => new NoteViewModel
            {
                Id = r.Id,
                Tile = string.IsNullOrEmpty(r.Password)?r.Tile:"内容加密",
                Content = string.IsNullOrEmpty(r.Password)?r.Content:"",
                Attachment = string.IsNullOrEmpty(r.Password)?r.Attachment:"",
                Type = r.Type.Name
            });
            return Ok(result);
        }

// GET api/nite/5
        [HttpGet("{id}")]
        public async Task<IActionResult> Detail(int id,string password)
        {
            var note = await _noteRespository.GetByIdAsync(id);
            if (note == null)
            {
                return NotFound();
            }
            if (!string.IsNullOrEmpty(password) && !note.Password.Equals(password))
                return Unauthorized();
            var result=new NoteViewModel()
            {
                Id = note.Id,
                Tile = note.Tile,
                Content = note.Content,
                Attachment = note.Attachment,
                Type = note.Type.Name
            };
            return Ok(result);
        }

// POST api/note
        [HttpPost]
        public async Task<IActionResult> Post([FromBody]NoteModel model)
        {
            if (!ModelState.IsValid)
                return BadRequest(ModelState);
            string filename = string.Empty;
            await _noteRespository.AddAsync(new Note()
            {
                Tile = model.Tile,
                Content = model.Content,
                Create = DateTime.Now,
                TypeId = model.Type,
                Password = model.Password,
                Attachment =filename
            });
            return CreatedAtAction("Index", "");
        }

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        private INoteRespository _noteRespository;                        //引入note的（业务逻辑层，姑且称为业务逻辑层吧）


        private INoteTypeRepository _noteTypeRepository;                  //引入notetype的（业务逻辑层，姑且称为业务逻辑层吧）

        public NoteController(INoteRespository noteRespository, INoteTypeRepository noteTypeRepository)  //构造行数初始化
        {
            this._noteRespository = noteRespository;
            this._noteTypeRepository = noteTypeRepository;
        }

        // GET: api/note
        [HttpGet]
        public IActionResult Get(int pageindex=1)                                     //分页获取
        {
            var pagesize = 10;
            var notes = _noteRespository.PageList(pageindex, pagesize);
            ViewBag.PageCount = notes.Item2;
            ViewBag.PageIndex = pageindex;
            var result = notes.Item1.Select(r => new NoteViewModel
            {
                Id = r.Id,
                Tile = string.IsNullOrEmpty(r.Password)?r.Tile:"内容加密",
                Content = string.IsNullOrEmpty(r.Password)?r.Content:"",
                Attachment = string.IsNullOrEmpty(r.Password)?r.Attachment:"",
                Type = r.Type.Name
            });
            return Ok(result);
        }

        // GET api/nite/5
        [HttpGet("{id}")]
        public async Task<IActionResult> Detail(int id,string password)
        {
            var note = await _noteRespository.GetByIdAsync(id);
            if (note == null)
            {
                return NotFound();
            }
            if (!string.IsNullOrEmpty(password) && !note.Password.Equals(password))
                return Unauthorized();
            var result=new NoteViewModel()
            {
                Id = note.Id,
                Tile = note.Tile,
                Content = note.Content,
                Attachment = note.Attachment,
                Type = note.Type.Name
            };
            return Ok(result);
        }

        // POST api/note
        [HttpPost]
        public async Task<IActionResult> Post([FromBody]NoteModel model)
        {
            if (!ModelState.IsValid)
                return BadRequest(ModelState);
            string filename = string.Empty;
            await _noteRespository.AddAsync(new Note()
            {
                Tile = model.Tile,
                Content = model.Content,
                Create = DateTime.Now,
                TypeId = model.Type,
                Password = model.Password,
                Attachment =filename
            });
            return CreatedAtAction("Index", "");
        }