CRM 2016 api unauthorized access - wcf

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);