Web API: Client: Call a Web API from a .net client

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原文地址： http://www.asp.net/web-api/overview/web-api-clients/calling-a-web-api-from-a-net-client

翻译地址：http://www.cnblogs.com/r01cn/archive/2012/11/20/2779011.html

Server Code：

1. 用EF创建Code First的Project；

2. 用VS创建Web API code；

Client Code：

using System;

using System.Collections.Generic;

using System.Linq;

using System.Net.Http;

using System.Net.Http.Headers;

using System.Text;

using System.Threading.Tasks;

using Test.EntityFramework.Models;

namespace Test.WebAPI.Client

{

    class Program

    {

        static void Main(string[] args)

        {

            // Unblock;

            TestUnblock();

            Console.WriteLine("Unblock...");

// Unblock

Test();

           // Block

            Test().Wait();

            Console.WriteLine("Exist...");

            Console.ReadLine();

        }

        public static async Task Test()

        {

            using (HttpClient client = new HttpClient())

            {

                client.BaseAddress = new Uri("http://localhost:55165/");

                client.DefaultRequestHeaders.Accept.Clear();

                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

                HttpResponseMessage response = await client.GetAsync("api/test");  // Blocking call

                // Get

                if (response.IsSuccessStatusCode)

                {

                    // Parse the response body. Blocking!

                    var products = await response.Content.ReadAsAsync<IEnumerable<Test.EntityFramework.Models.Test>>();

                    foreach (var p in products)

                    {

                        Console.WriteLine("{0}\t{1};", p.ID, p.Title);

                    }

                }

                else

                {

                    Console.WriteLine("{0} ({1})", (int)response.StatusCode, response.ReasonPhrase);

                }

                // Post

                var testEntity = new Test.EntityFramework.Models.Test() { Number = , Title = "title3" };

                response = await client.PostAsJsonAsync("api/test", testEntity);

                if (response.IsSuccessStatusCode)

                {

                    Uri testEntityUrl = response.Headers.Location;

                    // Put

                    response = await client.GetAsync(testEntityUrl);

                    testEntity = await response.Content.ReadAsAsync<Test.EntityFramework.Models.Test>();

                    testEntity.Title = "title3...";

                    response = await client.PutAsJsonAsync(testEntityUrl, testEntity);

                    // Delete

                    response = await client.DeleteAsync(testEntityUrl);

                }

            }

        }

        public static async void TestUnblock()

        {

            using (HttpClient client = new HttpClient())

            {

                client.BaseAddress = new Uri("http://localhost:55165/");

                client.DefaultRequestHeaders.Accept.Clear();

                client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

                HttpResponseMessage response = await client.GetAsync("api/test");  // Blocking call

                // Get

                if (response.IsSuccessStatusCode)

                {

                    // Parse the response body. Blocking!

                    var products = await response.Content.ReadAsAsync<IEnumerable<Test.EntityFramework.Models.Test>>();

                    foreach (var p in products)

                    {

                        Console.WriteLine("{0}\t{1};", p.ID, p.Title);

                    }

                }

                else

                {

                    Console.WriteLine("{0} ({1})", (int)response.StatusCode, response.ReasonPhrase);

                }

            }

        }

    }

}