如何从asp.net mvc 4中的外部rest完整Web服务获取json数据

Question

我正在尝试从外部 rest url(http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3) 获取 json 数据并将其显示在我的 asp.net mvc 应用程序的网页上。为此，我编写了一些代码，即

控制者---

namespace MyMVCApplication.Controllers
{
    public class EmployeeController : Controller
    {       

        string Baseurl = "http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3";
        public async Task<ActionResult> StateDetails()
        {
            List<State> listStateInfo = new List<State>();

            using (var client = new HttpClient())
            {
                client.BaseAddress = new Uri(Baseurl);
                client.DefaultRequestHeaders.Clear();

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

                HttpResponseMessage Res = await client.GetAsync(Baseurl);
                if (Res.IsSuccessStatusCode)
                {
                    //Storing the response details recieved from web api   
                    var StateResponse = Res.Content.ReadAsStringAsync().Result;

                    //Deserializing the response recieved from web api and storing into the Employee list  
                    listStateInfo = JsonConvert.DeserializeObject<List<State>>(StateResponse);

                }  

                return View(listStateInfo);
            }

        }

    }
}

Model----
namespace MyMVCApplication.Models
{
    public class State
    {
        public int ObjectID { get; set; }
        public string StateName { get; set; }
        public int Black { get; set; }
        public int Population { get; set; }
    }
}

调试代码时出现错误：“Newtonsoft.Json.JsonReaderException：解析值时遇到意外字符：<.path line position at jsonconvert.deserializeobject.>

请建议我如何解决这个问题。

Answer 1

将您的网址替换为http://sampleserver6.arcgisonline.com/arcgis/rest/services/Census/MapServer/3?f=pjson 以获取Web 服务的json 版本