当真正的ASYNC时，从MVC控制器调用API（在同一解决方案中）失败，但在SYNC时工作

Question

有人可以帮我这个 - 在下面的代码中，选项3适用于我，但这是一个SYNC调用，选项4永远不会返回哪个是真的ASYNC，我需要选项4才能工作（主要区别是使用AWAIT语法）。

//来自MVC APP中的控制器的代码

    IRBVer01AdminSite.Data.ApiClient apic = new Data.ApiClient();
    IRBVer01AdminSite.Models.Producer prd = new IRBVer01AdminSite.Models.Producer();

    // opt 3 - Make a HTTP call to API DLL - BUT this one is Syncronous
    source = null;
    source = apic.RunAsync("http://localhost:56099/", string.Concat("api/producers/", id.ToString().Trim())).Result;
    producer = null;
    destination = null;
    destination = Mapper.Map<IRBVer01CodeFirst.IRBVer01Domain.Producer>(source);
    producer = destination;
    if (producer == null)
        return HttpNotFound();
    //

    // opt 4 - Make Http call to API DLL - Syncronous method (FAILS SO FAR)
    source = null;
    source = apic.GetAsyncData("http://localhost:56099/", string.Concat("api/producers/", id.ToString().Trim())).Result;
    producer = null;
    destination = null;
    destination = Mapper.Map<IRBVer01CodeFirst.IRBVer01Domain.Producer>(source);
    producer = destination;
    if (producer == null)
        return HttpNotFound();

//

// MVC APP中的ApiClient CLASS代码

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Newtonsoft.Json;

// called on OPT 3
    public async Task<IRBVer01Api.Models.Producer> RunAsync(string urlBase, string urlPath)
    {
        IRBVer01Api.Models.Producer producer = null;
        using (var client = new HttpClient())
        {
            client.BaseAddress = new Uri(urlBase);
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            var response = client.GetStringAsync(urlPath).Result; // No.1 - This is not SYNC, there is no AWAIT syntax used 
            producer = Task.Factory.StartNew(() => JsonConvert.DeserializeObject<IRBVer01Api.Models.Producer>(response)).Result;
        }
        return producer;
    }

// called on OPT 4
    public async Task<IRBVer01Api.Models.Producer> GetAsyncData(string urlBase, string urlPath)
    {
        IRBVer01Api.Models.Producer producer = null;
        using (var client = new HttpClient())
        {
            client.BaseAddress = new Uri(urlBase);
            client.DefaultRequestHeaders.Accept.Clear();
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));

            var response = await client.GetStringAsync(urlPath); // No.1 - This is ASYNC Version but comipler never comes back
            //No.1 - for a moment forget about whats happening on the next syntax, the last line is not coming back... EVER
        //producer = Task.Factory.StartNew(() => JsonConvert.DeserializeObject<IRBVer01Api.Models.Producer>(response)).Result;
        }
        return producer;
    }

//