Web API with HTTPs

Question

Hello,

 

I have created one WEB API and one MVC web application. Both hosted on to IIS.

 

I am able to consume WEB API thorugh MVC application.

 

NOW I changed the binding of both the applcation from http to https with self signed certificate.

But when I call web api from MVC application it gives me below given error.

 

"The underlying connection was closed: Could not establish trust relationship for the SSL/TLS secure channel."

 

My CODE:

// POST: Login/Create
[HttpPost]
public async System.Threading.Tasks.Task<ActionResult> Create(Users objusers)
{
    try
    {
        // TODO: Add insert logic here

        BearerToken token = null;

        using (var httpClient = new HttpClient())
        {
            var tokenRequest =
                new List<KeyValuePair<string, string>>
                    {
                        new KeyValuePair<string, string>("grant_type", "password"),
                        new KeyValuePair<string, string>("username", objusers.username),
                        new KeyValuePair<string, string>("password", objusers.password)
                    };

            HttpContent encodedRequest = new FormUrlEncodedContent(tokenRequest);

            HttpResponseMessage response = httpClient.PostAsync("https://localhost:1100/Token", encodedRequest).Result;

            if (response.IsSuccessStatusCode)
            {
                token = response.Content.ReadAsAsync<BearerToken>().Result;

                Session["ApiAccessToken"] = token.access_token;
            }
            else
            {
                Session["ApiAccessToken"] = "";
            }
        }

        List<BenefitElections> benefitelections = new List<BenefitElections>();

        if (Session["ApiAccessToken"].ToString() != "")
        {
            using (var httpClient = new HttpClient())
            {
                httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", Session["ApiAccessToken"].ToString());

                var response = httpClient.GetAsync("https://localhost:1100/api/benefit/169548230").Result;

                if (response.IsSuccessStatusCode)
                {
                    var data = await response.Content.ReadAsStringAsync();
                    //var myObj = data.Substring(1, data.Length - 2);

                    benefitelections = JsonConvert.DeserializeObject<List<BenefitElections>>(data.ToString());
                }
            }

            return View("Index", benefitelections);
        }
        else
        {
            return View("Create");
        }
        //return RedirectToAction("Index", benefitelections);

    }
    catch (Exception Ex)
    {
        Ex.ToString();
        return View("Create");
    }
}

This code is working fine in case of http binding.