HTTPClick调用WebApi帮助类

1、创建ApiHelper类

2、复制以下代码到类中

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Text;
using System.Threading.Tasks;

namespace 对应的命名空间
{
    public class ApiHelper
    {
        /// <summary>
        /// api调用方法
        /// </summary>
        /// <param name="controllerName">控制器名称</param>
        /// <param name="overb">请求方式</param>
        /// <param name="action">方法名称</param>
        /// <param name="obj">方法参数</param>
        /// <returns>json字符串</returns>
        public static string GetApiMethod(string controllerName, string overb, string action, object obj = null)
        {
            Task<HttpResponseMessage> task = null;
            string json = "";
            //创建一个Http客户端对象
            HttpClient client = new HttpClient();
            //指定访问WebApi的uri地址
            client.BaseAddress = new Uri("http://localhost:47369/api/" + controllerName + "/");
            /*根据不同的动作执行不同的方法*/
            switch (overb)
            {
                case "get":
                    task = client.GetAsync(action);
                    break;
                case "post":
                    task = client.PostAsJsonAsync(action, obj);
                    break;
                case "delete":
                    task = client.DeleteAsync(action);
                    break;
                case "put":
                    task = client.PutAsJsonAsync(action, obj);
                    break;
                default:
                    break;
            }
            //等待请求的过程
            task.Wait();
            //接收响应的结果
            var response = task.Result;
            //判断响应的状态码是成功时候
            if (response.IsSuccessStatusCode)
            {
                //从响应对象的内容中读取字符串
                var read = response.Content.ReadAsStringAsync();
                //等待读取的过程
                read.Wait();
                //接收读取的结果-json
                json = read.Result;
            }
            return json;
        }
    }
}

3、修改命名空间

4、成功调用