WebApi2 入门实例1

1.创建空的WebApi 项目



创建成功后的引用



项目中的全局文件

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Http;
using System.Web.Routing;

namespace WebApiThree
{
public class WebApiApplication : System.Web.HttpApplication
{
protected void Application_Start()
{
GlobalConfiguration.Configure(WebApiConfig.Register);
}
}
}

项目中的api配置和路由

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web.Http;

namespace WebApiThree
{
public static class WebApiConfig
{
public static void Register(HttpConfiguration config)
{
// Web API 配置和服务

// Web API 路由
config.MapHttpAttributeRoutes();

config.Routes.MapHttpRoute(
name: "DefaultApi",
routeTemplate: "api/{controller}/{id}",
defaults: new { id = RouteParameter.Optional }
);
}
}
}

----------------------------------------------------------------HelloWord实例————————————————————————————————————

1.WebApi控制器

/// <summary>
/// 访问控制器
/// </summary>
public class ProductsController : ApiController
{
Product[] products = new Product[]
{
new Product { Id = 1, Name = "Tomato Soup", Category = "Groceries", Price = 1 },
new Product { Id = 2, Name = "Yo-yo", Category = "Toys", Price = 3.75M },
new Product { Id = 3, Name = "Hammer", Category = "Hardware", Price = 16.99M }
};
/// <summary>
/// 获取列表
/// </summary>
/// <returns></returns>
public IEnumerable<Product> GetAllProducts()
{
return products;
}
/// <summary>
/// 获取对象
/// </summary>
/// <param name="id">兑现ID</param>
/// <returns></returns>
public IHttpActionResult GetProduct(int id)
{
var product = products.FirstOrDefault((p) => p.Id == id);
if (product == null)
{
return NotFound();
}
return Ok(product);
}
}

2.使用JavaScript访问接口

<div>
<h2>All Products</h2>
</div>
<ul id="products" />
<div>
<h2>Search by ID</h2> <input type="text" id="prodId" size="5" />
<input type="button" value="Search" onclick="find();" /> <p id="product" />
</div>
<script src="../Scripts/jquery-1.11.1.min.js"></script>
<script>
var uri = '/api/products';
$(document).ready(function () {
$.getJSON(uri)
.done(function (data) {
$.each(data, function (key, item) {
$('<li>', { text: formatItem(item) }).appendTo($('#products'));
});
});
});
function formatItem(item) {
return item.Name + ': $' + item.Price;
}
function find() {
var id = $('#prodId').val();
$.getJSON(uri + '/' + id)
.done(function (data) {
$('#product').text(formatItem(data));
})
.fail(function (jqXHR, textStatus, err) {
$('#product').text('Error: ' + err);
});
}
</script>