Web API with ASP.NET Core 1.0 MVC

1. Demo ASPI Overview :

API	Description	Request body	Response body
GET /api/todo	Get all to-do items	None	Array of to-do items
GET /api/todo/{id}	Get an item by ID	None	To-do item
POST /api/todo	Add a new item	To-do item	To-do item
PUT /api/todo/{id}	Update an existing item	To-do item
DELETE /api/todo/{id}	Delete an item	None. No request body-	None

2. 创建API 项目：





实体类：

namespace TodoApi.Models
{
public class TodoItem
{
public string Key { get; set; }
public string Name { get; set; }
public bool IsComplete { get; set; }
}
}

仓储类Repository:

using System.Collections.Generic;

namespace TodoApi.Models
{
public interface ITodoRepository
{
void Add(TodoItem item);
IEnumerable<TodoItem> GetAll();
TodoItem Find(string key);
TodoItem Remove(string key);
void Update(TodoItem item);
}
}

namespace TodoApi.Models
{
public class TodoRepository : ITodoRepository
{
private static ConcurrentDictionary<string, TodoItem> _todos =
new ConcurrentDictionary<string, TodoItem>();

public TodoRepository()
{
Add(new TodoItem { Name = "Item1" });
}

public IEnumerable<TodoItem> GetAll()
{
return _todos.Values;
}

public void Add(TodoItem item)
{
item.Key = Guid.NewGuid().ToString();
_todos[item.Key] = item;
}

public TodoItem Find(string key)
{
TodoItem item;
_todos.TryGetValue(key, out item);
return item;
}

public TodoItem Remove(string key)
{
TodoItem item;
_todos.TryRemove(key, out item);
return item;
}

public void Update(TodoItem item)
{
_todos[item.Key] = item;
}
}
}

注册仓储：（使用ASP.NET Core自带的依赖注入）

在Startup.cs中的ConfigureServices方法中：

public void ConfigureServices(IServiceCollection services)
{
// Add framework services.
services.AddMvc();

services.AddSingleton<ITodoRepository, TodoRepository>();
}

添加控制器Web API Controller Class：

namespace TodoApi.Controllers
{
[Route("api/[controller]")]
public class TodoController : Controller
{
public TodoController(ITodoRepository todoItems)
{
TodoItems = todoItems;
}
public ITodoRepository TodoItems { get; set; }
}
}

创建Action:CRUD

[HttpGet]
public IEnumerable<TodoItem> GetAll()
{
return TodoItems.GetAll();
}

[HttpGet("{id}", Name = "GetTodo")]
public IActionResult GetById(string id)
{
var item = TodoItems.Find(id);
if (item == null)
{
return NotFound();
}
return new ObjectResult(item);
}

[HttpPost]
public IActionResult Create([FromBody] TodoItem item)
{
if (item == null)
{
return BadRequest();
}
TodoItems.Add(item);
return CreatedAtRoute("GetTodo", new { id = item.Key }, item);
}

[HttpPut("{id}")]
public IActionResult Update(string id, [FromBody] TodoItem item)
{
if (item == null || item.Key != id)
{
return BadRequest();
}

var todo = TodoItems.Find(id);
if (todo == null)
{
return NotFound();
}

TodoItems.Update(item);
return new NoContentResult();
}

[HttpDelete("{id}")]
public IActionResult Delete(string id)
{
var todo = TodoItems.Find(id);
if (todo == null)
{
return NotFound();
}

TodoItems.Remove(id);
return new NoContentResult();
}