Webportal/WebPortal/GuestName/Controllers/HomeController.cs

using GuestName.Models;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;

namespace GuestName.Controllers
{
    public class HomeController : Controller
    {
        private readonly ILogger<HomeController> _logger;

        public HomeController(ILogger<HomeController> logger)
        {
            _logger = logger;
        }

        public IActionResult Index()
        {
            return View();
        }

        [HttpPost]
        public JsonResult RefreshGuestName(string nextStatus)
        {
            try
            {
                using (var client = new HttpClient())
                {
                    string url = "http://10.226.234.12:8039/merchant/getGuestForWeb?nextStatus=" + nextStatus;
                    var response = client.GetAsync(url).Result;

                    if (response.IsSuccessStatusCode)
                    {
                        var responseContent = response.Content;

                        // by calling .Result you are synchronously reading the result
                        string responseString = responseContent.ReadAsStringAsync().Result;
                        GuestResponse res = GuestResponse.Parse(responseString);
                        if (res.errorCode == "00000")
                        {
                            if (res.guest != null)
                            {
                                return Json(new
                                {
                                    error = "0",
                                    content = res.message,
                                    name = res.guest.name,
                                    gender = res.guest.gender == 1 ? "Mr." : "Ms.",
                                    organize = res.guest.organize,
                                    position = res.guest.position
                                });
                            }
                            else
                            {
                                return Json(new
                                {
                                    error = "1",
                                    content = "No more guest"
                                });
                            }
                        }
                    }
                    var errorCode = response.StatusCode.ToString();
                    return Json(new
                    {
                        error = errorCode,
                        content = "System failed"
                    });
                }
            }
            catch (Exception ex)
            {
                _logger.LogError("Error get guest name", ex);
                return Json(new
                {
                    error = "-1",
                    content = "System failed"
                });
            }
        }



        [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
        public IActionResult Error()
        {
            return View(new ErrorViewModel { RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier });
        }
    }
}