我正在开发一个winform应用,我正在对GoogleMaps API进行API调用。但由于某种原因,我无法得到答复。或者实际上,我确实得到了一个响应但却无法做任何事情。你能帮帮我吗?我现在已经坚持了一段时间:P
我的代码:
using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace GoogleMaps
{
public partial class Main : Form
{
public Main()
{
InitializeComponent();
setup().Wait();
}
static HttpClient client = new HttpClient();
static async Task setup()
{
client.BaseAddress = new Uri("https://maps.googleapis.com/maps/api/geocode/json");
client.DefaultRequestHeaders.Accept.Clear();
client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
}
static async Task<Result> getAdress(int huisnummer, string postcode)
{
Result address = null;
HttpResponseMessage response = await client.GetAsync($"?address=00+1234AB&key=MYKEY");
if (response.IsSuccessStatusCode)
{
address = await response.Content.ReadAsAsync<Result>();
}
return address;
}
private async void BTN_submit_Click(object sender, EventArgs e)
{
Result address = new Result();
address = await getAdress(31, "8256SC");
richTextBox1.Text = "address is:" + address.formatted_address;
}
}
}
我的“将JSON粘贴为类”类:
namespace GoogleMaps
{
public class Rootobject
{
public Result[] results { get; set; }
public string status { get; set; }
}
public class Result
{
public Address_Components[] address_components { get; set; }
public string formatted_address { get; set; }
public Geometry geometry { get; set; }
public string place_id { get; set; }
public string[] types { get; set; }
}
public class Geometry
{
public Location location { get; set; }
public string location_type { get; set; }
public Viewport viewport { get; set; }
}
public class Location
{
public float lat { get; set; }
public float lng { get; set; }
}
public class Viewport
{
public Northeast northeast { get; set; }
public Southwest southwest { get; set; }
}
public class Northeast
{
public float lat { get; set; }
public float lng { get; set; }
}
public class Southwest
{
public float lat { get; set; }
public float lng { get; set; }
}
public class Address_Components
{
public string long_name { get; set; }
public string short_name { get; set; }
public string[] types { get; set; }
}
}
我的输出现在没什么。但我确实收到了200回复。 我该如何解决这个问题?
提前感谢您的帮助!
答案 0 :(得分:4)
您正在反序列化到不正确的类中。正确的类是Rootobject
address = await response.Content.ReadAsAsync<Rootobject>();
而不是使用Result
address = await response.Content.ReadAsAsync<Result>();
示例地理编码API响应(from Google API Docs):
{
"results" : [
{
"address_components" : [
{
"long_name" : "1600",
"short_name" : "1600",
"types" : [ "street_number" ]
}]
...
}],
"status" : "OK"
}