使用C＃验证REST API时出错

如何解决使用C＃验证REST API时出错

我正在尝试通过REST API Web服务进行身份验证，并检索承载访问令牌，稍后将用于对特定资源进行请求。我最终要做到的是.NET MVC框架。出于测试目的，我创建了一个示例控制台应用程序，但是该程序只是在运行时退出，并且在line response = await client.Error时出错。PostAsync（“ Token”，requestParams）.ConfigureAwait（false）; //错误

这是我正在使用的示例。我能够使用邮递员获得访问令牌。

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;


namespace test
{
 class Program

    {

        static void Main(string[] args)

        {
            Program prm = new Program();
            prm.InvokeMethod();
        }

        public async void InvokeMethod()
        {
            using (var client = new HttpClient())
            {
                // Setting Base address.  
                client.BaseAddress = new Uri("https://test.com/api/oauth/token");

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

                // Initialization.  
                HttpResponseMessage response = new HttpResponseMessage();
                List<KeyValuePair<string,string>> allIputParams = new List<KeyValuePair<string,string>>();
                allIputParams.Add(new KeyValuePair<string,string>("client_id","ID_dfdhfdjkhfdkfdfjkdfjdkfjd"));
                allIputParams.Add(new KeyValuePair<string,string>("client_secret","djfhdskfjhskdjhfksdhjkxcklcfkdjf"));
                allIputParams.Add(new KeyValuePair<string,string>("grant_type","client_credentials"));

                // Convert Request Params to Key Value Pair.  
                // URL Request parameters.  
                HttpContent requestParams = new FormUrlEncodedContent(allIputParams);

                // HTTP POST  
                response = await client.PostAsync("Token",requestParams).ConfigureAwait(false);  //ERROR 

                // Verification  
                if (response.IsSuccessStatusCode)
                {
                    // Reading Response.  
                }
            }

        }

    }
}

Update- This worked using RestSharp 

using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using RestSharp;
using Newtonsoft.Json.Linq;

    namespace test
    {
        class Program
    
        {
    
            static void Main(string[] args)
    
            {
                Program prm = new Program();
                prm.InvokeMethod();
            }
    
            public void InvokeMethod()
            {
                var client = new RestClient("https://test/api/oauth/token");
                var request = new RestRequest(Method.POST);
                request.AddHeader("cache-control","no-cache");
                request.AddHeader("content-type","application/x-www-form-urlencoded");
                request.AddHeader("authorization","Bearer <access_token>");
                request.AddParameter("application/x-www-form-urlencoded","grant_type=client_credentials&client_id=fsdfsdfdsf&client_secret=dfdsfsdfds",ParameterType.RequestBody);
                IRestResponse response = client.Execute(request);
                var jObject = JObject.Parse(response.Content);
    
                if (response.IsSuccessful)
                {
                    //Console.WriteLine(response.Content);     
                    // Let us print the variable to see what we got
                    Console.WriteLine("received from Response " + jObject.GetValue("access_token"));
    
                }
            }
        }
    

我能够使用Java成功进行身份验证，但我无法理解是什么导致C＃程序出错。是不是因为client_id，client_secret没有在正文中传递？

import java.io.IOException;

import okhttp3.MediaType;
import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.RequestBody;
import okhttp3.Response;


public class NewClass {
    
    public static void main(String[] args) throws IOException {
        
        OkHttpClient client = new OkHttpClient();
        
                MediaType mediaType = MediaType.parse("application/x-www-form-urlencoded");
                RequestBody body = RequestBody.create(mediaType,"grant_type=client_credentials&client_id=ID_dfdgdfgfdgfgfgf&client_secret=dgfgfdgffgfhghg");
                Request request = new Request.Builder()
                  .url("https://test/api/oauth/token")
                  .method("POST",body)
                  .addHeader("Content-Type","application/x-www-form-urlencoded")
                  .build();
                Response response = client.newCall(request).execute();
            System.out.println(response);
            
    }

}

}