Dynamics 365 Online通过OAuth 2 Client Credential授权(Server-to-Server Authentication)后调用Web API...

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

namespace UsingWebAPI
{
    public class AuthenticationResponse
    {
        public string access_token { get; set; }
        public int expires_in { get; set; }
        public int expires_on { get; set; }
        public int ext_expires_in { get; set; }
        public int not_before { get; set; }
        public string resource { get; set; }
        public string token_type { get; set; }
    }
    class Program
    {

        static string resourceUrl = "https://crm219270.crm5.dynamics.com/";
        static string clientId = "de8dd947-a3e3-48ec-8602-c3063f11dc29";
        static string clientSecret = "5FsXh2*oNyLRm]Go1a9hD.[]=k54GNOZ";
        static string tenantId = "3e28b187-1c5c-42f5-a1be-3f47570da35d";
static void Main(string[] args)
        {
            GetAuthenticationResponse();
            Console.ReadKey();
        }

        private static async void GetAuthenticationResponse()
        {
            List<KeyValuePair<string, string>> vals = new List<KeyValuePair<string, string>>();

            vals.Add(new KeyValuePair<string, string>("client_id", clientId));
            vals.Add(new KeyValuePair<string, string>("resource", resourceUrl));
            vals.Add(new KeyValuePair<string, string>("grant_type", "client_credentials"));
            vals.Add(new KeyValuePair<string, string>("client_secret", clientSecret));
            string tokenUrl = string.Format("https://login.windows.net/{0}/oauth2/token", tenantId);

            using (HttpClient httpClient = new HttpClient())
            {
                httpClient.DefaultRequestHeaders.Add("Cache-Control", "no-cache");
                HttpContent content = new FormUrlEncodedContent(vals);
                HttpResponseMessage hrm = httpClient.PostAsync(tokenUrl, content).Result;
                AuthenticationResponse authenticationResponse = null;
                if (hrm.IsSuccessStatusCode)
                {
                    string data = await hrm.Content.ReadAsStringAsync();
                    authenticationResponse = JsonConvert.DeserializeObject<AuthenticationResponse>(data);
                    await DataOperations(authenticationResponse);
                }
                else
                {
                    Console.WriteLine("Error." + hrm.ReasonPhrase);
                }
            }
        }

        private static async Task DataOperations(AuthenticationResponse authResult)
        {
            using (HttpClient httpClient = new HttpClient())
            {
                httpClient.BaseAddress = new Uri(resourceUrl);
                httpClient.Timeout = new TimeSpan(0, 2, 0); //2 minutes
                httpClient.DefaultRequestHeaders.Add("OData-MaxVersion", "4.0");
                httpClient.DefaultRequestHeaders.Add("OData-Version", "4.0");
                httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", authResult.access_token);
                string content = JsonConvert.SerializeObject(new { name = "A Account", telephone1 = "123456789"});
                HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "api/data/v9.1/accounts");
                request.Content = new StringContent(content);
                request.Content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");
                HttpResponseMessage response = await httpClient.SendAsync(request);
                if (response.IsSuccessStatusCode)
                {
                    Console.WriteLine("Account created.");
                }
                else
                {
                    Console.WriteLine(String.Format("Failed to create account, reason is '{0}'.", response.ReasonPhrase));
                }
            }
        }
    }
}

using Microsoft.IdentityModel.Clients.ActiveDirectory;
using Newtonsoft.Json;
using System;
using System.Net.Http;
using System.Net.Http.Headers;

namespace UsingWebAPI
{
    class Program
    {

        static string resourceUrl = "https://crm219270.crm5.dynamics.com/";
        static string clientId = "de8dd947-a3e3-48ec-8602-c3063f11dc29";
        static string clientSecret = "5FsXh2*oNyLRm]Go1a9hD.[]=k54GNOZ";
        static string tenantId = "3e28b187-1c5c-42f5-a1be-3f47570da35d";

        static void Main(string[] args)
        {
            AuthAndInvoke();
            Console.ReadKey();
        }

        private static async void AuthAndInvoke()
        {
            var credentials = new ClientCredential(clientId, clientSecret);
            var authContext = new AuthenticationContext("https://login.microsoftonline.com/" + tenantId);
            var result = await authContext.AcquireTokenAsync(resourceUrl, credentials);
            using (HttpClient httpClient = new HttpClient())
            {
                httpClient.BaseAddress = new Uri(resourceUrl);
                httpClient.Timeout = new TimeSpan(0, 2, 0); //2 minutes
                httpClient.DefaultRequestHeaders.Add("OData-MaxVersion", "4.0");
                httpClient.DefaultRequestHeaders.Add("OData-Version", "4.0");
                httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", result.AccessToken);
                string content = JsonConvert.SerializeObject(new { name = "A Account", telephone1 = "123456789" });
                HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "api/data/v9.1/accounts");
                request.Content = new StringContent(content);
                request.Content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/json");
                HttpResponseMessage response = await httpClient.SendAsync(request);
                if (response.IsSuccessStatusCode)
                {
                    Console.WriteLine("Account created.");
                }
                else
                {
                    Console.WriteLine(String.Format("Failed to create account, reason is '{0}'.", response.ReasonPhrase));
                }
            }
        }
    }
}