c# 【MVC】WebApi開發實例

using System;  
using System.Collections.Generic;  
using System.ComponentModel.DataAnnotations;  
using System.Linq;  
using System.Web;  
  
namespace ProductStore.Models  
{  
    //商品實體類  
    public class Product  
    {  
        public int Id { get; set; }  
        public string Name { get; set; }  
        public string Category { get; set; }  
        public decimal Price { get; set; }  
    }  
}  

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Text;  
using System.Threading.Tasks;  
  
namespace ProductStore.Models  
{  
    //商品接口  
    interface IProductRepository  
    {  
        IEnumerable<Product> GetAll();  
        Product Get(int id);  
        Product Add(Product item);  
        void Remove(int id);  
        bool Update(Product item);  
    }  
}  

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Web;  
  
namespace ProductStore.Models  
{  
    //商品操作類  
    public class ProductRepository : IProductRepository  
    {  
        private List<Product> products = new List<Product>();  
        private int _nextId = 1;  
  
        public ProductRepository()  
        {  
            Add(new Product { Name = "Tomato soup", Category = "Groceries", Price = 1.39M });  
            Add(new Product { Name = "Yo-yo", Category = "Toys", Price = 3.75M });  
            Add(new Product { Name = "Hammer", Category = "Hardware", Price = 16.99M });  
        }  
  
        public IEnumerable<Product> GetAll()  
        {  
            return products;  
        }  
  
        public Product Get(int id)  
        {  
            return products.Find(p => p.Id == id);  
        }  
  
        public Product Add(Product item)  
        {  
            if (item == null)  
            {  
                throw new ArgumentNullException("item");  
            }  
  
            item.Id = _nextId++;  
            products.Add(item);  
            return item;  
        }  
  
        public void Remove(int id)  
        {  
            products.RemoveAll(p => p.Id == id);  
        }  
  
        public bool Update(Product item)  
        {  
            if (item == null)  
            {  
                throw new ArgumentNullException("item");  
            }  
            int index = products.FindIndex(p => p.Id == item.Id);  
            if (index == -1)  
            {  
                return false;  
            }  
            products.RemoveAt(index);  
            products.Add(item);  
            return true;  
        }  
    }  
}  

using System;  
using System.Collections.Generic;  
using System.Linq;  
using System.Net;  
using System.Net.Http;  
using System.Web.Http;  
using ProductStore.Models;  
using System.Text;  
  
//控制器  
namespace ProductStore.Controllers  
{  
    public class ProductsController : ApiController  
    {  
        /* 
         * 微軟的web api是在vs2012上的mvc4項目綁定發行的，它提出的web api是完全基於RESTful標准的， 
         * 完全不同於之前的（同是SOAP協議的）wcf和webService，它是簡單，代碼可讀性強的，上手快的， 
         * 如果要拿它和web服務相比，我會說，它的接口更標准，更清晰，沒有混亂的方法名稱， 
         *  
         * 有的只有幾種標准的請求，如get,post,put,delete等，它們分別對應的幾個操作，下面講一下： 
         * GET：生到數據列表（默認），或者得到一條實體數據 
         * POST：添加服務端添加一條記錄，記錄實體為Form對象 
         * PUT：添加或修改服務端的一條記錄，記錄實體的Form對象，記錄主鍵以GET方式進行傳輸 
         * DELETE：刪除 服務端的一條記錄          
         */  
        static readonly IProductRepository repository = new ProductRepository();  
  
        public IEnumerable<Product> GetAllProducts()  
        {  
            return repository.GetAll();  
        }  
  
        public Product GetProduct(int id)  
        {  
            Product item = repository.Get(id);  
            if (item == null)  
            {  
                throw new HttpResponseException(HttpStatusCode.NotFound);  
            }  
            return item;  
        }  
  
        public IEnumerable<Product> GetProductsByCategory(string category)  
        {  
            return repository.GetAll().Where(  
                p => string.Equals(p.Category, category, StringComparison.OrdinalIgnoreCase));  
        }  
  
        public HttpResponseMessage PostProduct(Product item)  
        {  
            item = repository.Add(item);  
            return new HttpResponseMessage(HttpStatusCode.OK)  
            {  
                Content = new StringContent("add success", System.Text.Encoding.UTF8, "text/plain")  
            };  
        }  
  
        public void PutProduct(int id, Product product)  
        {  
            product.Id = id;  
            if (!repository.Update(product))  
            {  
                throw new HttpResponseException(HttpStatusCode.NotFound);  
            }  
        }  
  
        public void DeleteProduct(int id)  
        {  
            repository.Remove(id);  
        }  
    }  
}  

<%@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage<dynamic>" %>  
  
<!DOCTYPE html>  
<html>  
<head runat="server">  
    <meta name="viewport" content="width=device-width" />  
    <title>測試Web Api - Jquery調用</title>  
    <script src="../../Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>  
</head>  
<body>  
    <div>  
    <fieldset>  
        <legend>測試Web Api  
        </legend>  
        <a href="javascript:add()">添加(post)</a>  
        <a href="javascript:update(1)">更新(put)</a>  
        <a href="javascript:deletes(1)">刪除(delete)</a>  
        <a href="javascript:getall()">列表(Get)</a>  
        <a href="javascript:getone()">實體(Get)</a>  
    </fieldset>  
    <table id="products">  
    <thead>  
        <tr><th>ID</th><th>Name</th><th>Category</th><th>Price</th></tr>  
    </thead>  
    <tbody id="looptr">  
    </tbody>  
    </table>  
    <script type="text/javascript">  
        $(function () {  
            getall();  
        });  
  
        //獲取列表  
        function getall() {  
            var str = "";  
            $.getJSON("/api/products", function (products) {  
                alert(JSON.stringify(products));  
                $.each(products, function (index, product) {  
                    str += "<tr>"  
                    str += "<td>" + products[index].Id + "</td>";  
                    str += "<td>" + products[index].Name + "</td>";  
                    str += "<td>" + products[index].Category + "</td>";  
                    str += "<td>" + products[index].Price + "</td>";  
                    str += "<tr>"  
                });  
                $("#looptr").html(str);  
            });  
        }  
  
        //獲取某條信息  
        function getone() {  
            var str = "";  
            $.getJSON("/api/products/1", function (product) {  
                alert(JSON.stringify(product));  
                str += "<tr>"  
                str += "<td>" + product.Id + "</td>";  
                str += "<td>" + product.Name + "</td>";  
                str += "<td>" + product.Category + "</td>";  
                str += "<td>" + product.Price + "</td>";  
                str += "<tr>"  
                $("#looptr").html(str);  
            });  
        }  
  
        //新增  
        function add() {  
            $.ajax({  
                url: "/api/products/",  
                type: "POST",  
                data: { "Id": 4, "Name": "test", "Category": "Parry", "Price": 239 },  
                success: function (data) { alert(JSON.stringify(data)); }  
            });  
        }  
  
        //更新  
        function update(id) {  
            $.ajax({  
                url: "/api/products?id=4",  
                type: "Put",  
                data: { "Id": 1, "Name": "moditest", "Category": "Parry", "Price": 89 },  
                success: function (data) { alert(JSON.stringify(data)); }  
            });  
        }  
  
        //刪除  
        function deletes(id) {  
            $.ajax({  
                url: "/api/products/4",  
                type: "DELETE",  
                success: function (data) { alert(data); }  
            });  
        }  
    </script>         
    </div>  
</body>  
</html>