.net 控制器调用外部链接传参方法

public class RequestHelper
{
/// <summary>
/// 发起post请求
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="url">url</param>
/// <param name="postData">post数据</param>
/// <returns></returns>
public static T PostResponse<T>(string url, object postData)
{
string json = JsonHelper.ToJson(postData);
if (url.StartsWith("https"))
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
HttpContent httpContent = new StringContent(json);
httpContent.Headers.ContentType = new MediaTypeHeaderValue("application/json");
HttpClient httpClient = new HttpClient();

T result = default(T);

HttpResponseMessage response = httpClient.PostAsync(url, httpContent).Result;

if (response.IsSuccessStatusCode)
{
Task<string> t = response.Content.ReadAsStringAsync();
string s = t.Result;
result = JsonHelper.DeSerializeObject<T>(s);
}
return result;
}

/// <summary>
/// 发起get请求
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="url">url</param>
/// <returns></returns>
public static T GetResponse<T>(string url)
{
if (url.StartsWith("https"))
System.Net.ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls;
HttpClient httpClient = new HttpClient();
T result = default(T);
HttpResponseMessage response = httpClient.GetAsync(url).Result;

if (response.IsSuccessStatusCode)
{
Task<string> t = response.Content.ReadAsStringAsync();
string s = t.Result;
result = JsonHelper.DeSerializeObject<T>(s);
}
return result;
}
}

调用：

List<double[]> logAndLat = new List<double[]>();

logAndLat.Add(new double[] {113.326196, 34.715269 });

logAndLat.Add(new double[] {113.321561, 34.722183});

public static double GetArea(List<double[]> points)
{
string result = RequestHelper.PostResponse<string>("url", points);
double.TryParse(result, out double r);
return r;
}