How to access Facebook profile information by using ASP.NET MVC 5

Question

I am developing a basic web site in ASP.NET MVC 5 (using visual studio 2013). The site will use Facebook for user authentication and for retrieving initial profile data.like stack over flow login with facebook..access user name,profile photo etc..plz any one help me relevant sample

startup.auth.cs

 FacebookAuthenticationOptions fbao = new FacebookAuthenticationOptions();
        fbao.AppId = "****";
        fbao.AppSecret = "*****";
        fbao.Scope.Add("email");
        fbao.Scope.Add("user_birthday");
        fbao.Scope.Add("user_hometown");

        fbao.SignInAsAuthenticationType = Microsoft.Owin.Security.AppBuilderSecurityExtensions.GetDefaultSignInAsAuthenticationType(app);

        app.UseFacebookAuthentication(fbao);

Account controller>>Externallogincallback

   // GET: /Account/ExternalLoginCallback
    [AllowAnonymous]
    public async Task<ActionResult> ExternalLoginCallback(string returnUrl)
    {
        ClaimsIdentity fboa = await AuthenticationManager.GetExternalIdentityAsync(DefaultAuthenticationTypes.ExternalCookie);
        //var email = ext.Claims.First(x => x.Type.Contains("emailaddress")).Value;
        var loginInfo = await AuthenticationManager.GetExternalLoginInfoAsync();
        if (loginInfo == null)
        {
            return RedirectToAction("Login");
        }

        // Sign in the user with this external login provider if the user already has a login
        var result = await SignInManager.ExternalSignInAsync(loginInfo, isPersistent: false);



        switch (result)
        {
            case SignInStatus.Success:
                return RedirectToLocal(returnUrl);
            case SignInStatus.LockedOut:
                return View("Lockout");
            case SignInStatus.RequiresVerification:
                return RedirectToAction("SendCode", new { ReturnUrl = returnUrl, RememberMe = false });
            case SignInStatus.Failure:
            default:
                // If the user does not have an account, then prompt the user to create an account
                ViewBag.ReturnUrl = returnUrl;
                ViewBag.LoginProvider = loginInfo.Login.LoginProvider;
                return View("ExternalLoginConfirmation", new ExternalLoginConfirmationViewModel { Email = loginInfo.Email });
        }
    }

Account view model

public class ExternalLoginConfirmationViewModel
{
    [Required]
    [Display(Name = "Email")]
    public string Email { get; set; }
    public string UserName { get; set; }
}

externalloginconfirmationview

<h4>Association Form</h4>
<hr />
@Html.ValidationSummary(true, "", new { @class = "text-danger" })
<p class="text-info">
    You've successfully authenticated with <strong>@ViewBag.LoginProvider</strong>.
    Please enter a user name for this site below and click the Register button to finish
    logging in.
</p>
<div class="form-group">
    @Html.LabelFor(m => m.Email, new { @class = "col-md-2 control-label" })
    <div class="col-md-10">
        @Html.TextBoxFor(m => m.Email, new { @class = "form-control" })
        @Html.ValidationMessageFor(m => m.Email, "", new { @class = "text-danger" })
    </div>
</div>
<div class="form-group">
    @Html.LabelFor(m => m.UserName, new { @class = "col-md-2 control-label" })
    <div class="col-md-10">
        @Html.TextBoxFor(m => m.UserName, new { @class = "form-control" })
        @Html.ValidationMessageFor(m => m.UserName, "", new { @class = "text-danger" })
    </div>
</div>
<div class="form-group">
    <div class="col-md-offset-2 col-md-10">
        <input type="submit" class="btn btn-default" value="Register" />
    </div>
</div>

Answer 1

Following are some nice tutorials that may help solve your issue

http://www.asp.net/mvc/overview/security/create-an-aspnet-mvc-5-app-with-facebook-and-google-oauth2-and-openid-sign-on

http://www.asp.net/mvc/overview/getting-started/aspnet-mvc-facebook-birthday-app