CRM 2016 api unauthorized access

Question

I wrote this code to connect to CRM on premise 2016 and retrieve some data.

Here it's

var credentials = new NetworkCredential("username", "password?", "domain");
            var client = new HttpClient(new HttpClientHandler() { Credentials = credentials })
            {
                BaseAddress = new Uri("https://xxxtestenv.elluciancrmrecruit.com/api/data/v8.0/")
            };
            client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
            var response = client.GetAsync("datatel_events?$orderby=datatel_eventname").Result;
            if (response.IsSuccessStatusCode)
            {
                var yourcustomobjects = response.Content.ReadAsStringAsync();
            }

but I get this error

  response    {StatusCode: 401, ReasonPhrase: 'Unauthorized', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:

{ REQ_ID: b685b007-199b-4a4a-85cc-3a29684e5588 Date: Thu, 22 Sep 2016 19:27:35 GMT Server: Microsoft-IIS/8.5 WWW-Authenticate: Negotiate WWW-Authenticate: NTLM X-Powered-By: ASP.NET Connection: keep-alive Content-Length: 49 Content-Type: text/plain }} System.Net.Http.HttpResponseMessage

Any suggestions?

Answer 1

Try using below code to connect to MS CRM on premise.

string strOrganizationUri = "https://{your domain}/XRMServices/2011/Organization.svc";
            string strUserName = "{your domain username}";
            string strPassword = "{your domain password}";
            var organizationUriIFD = new Uri(strOrganizationUri);

            var credentials = new ClientCredentials();
            credentials.UserName.UserName = strUserName;
            credentials.UserName.Password = strPassword;

            IServiceConfiguration<IOrganizationService> config = ServiceConfigurationFactory.CreateConfiguration<IOrganizationService>(organizationUriIFD);
            IOrganizationService service;
            using (var serviceProxy = new OrganizationServiceProxy(config, credentials))
            {
                // This statement is required to enable early-bound type support.
                serviceProxy.ServiceConfiguration.CurrentServiceEndpoint.Behaviors.Add(new ProxyTypesBehavior());

                service = serviceProxy;

            }


            // Get the ID's of the current user and business unit.
            var who = new WhoAmIRequest();
            //retreive user data from the server.
            var whoResponse = (WhoAmIResponse)service.Execute(who);