public async Task <LoginCompletedArgs> LoginAsync()
{
ShowLoading(true, "Logging into Facebook...");
currentState = CurrentState.Login;
var loginParams = new Dictionary <string, object>();
loginParams.Add(PostFields.Scope, ExtendedPermissions);
loginParams.Add(PostFields.ClientId, AppId);
loginParams.Add(PostFields.RedirectUri, Constants.RedirectUriLogin);
loginParams.Add(PostFields.Display, "touch");
loginParams.Add(PostFields.ResponseType, "token");
var loginUrl = facebookClient.GetLoginUrl(loginParams);
LoginCompletedArgs loginResult = new LoginCompletedArgs(false);
if (IsLogged)
{
ShowLoading(false);
HttpWebRequest webRequest = WebRequest.CreateHttp(string.Format("https://graph.facebook.com/me?access_token={0}", AccessTokenData.AccessToken));
webRequest.Method = "GET";
using (var response = (HttpWebResponse)(await Task <WebResponse> .Factory.FromAsync(webRequest.BeginGetResponse, webRequest.EndGetResponse, null)))
{
if (response.StatusCode == HttpStatusCode.OK)
{
NavigateToHide();
loginResult = new LoginCompletedArgs(true, AccessTokenData);
}
else
{
loginResult = await NavigateToLoginAsync(loginUrl);
}
}
}
else
{
loginResult = await NavigateToLoginAsync(loginUrl);
}
return(loginResult);
}
private static void LoginNavigationCallBack(NavigationEventArgs e, string fbAppId, string extendedPermissions, out LoginCompletedArgs loginResult)
{
if (CurrentState == FacebookSDKState.Login)
{
loginResult = RetrieveLoginResponse(e, fbAppId, extendedPermissions);
}
else
{
loginResult = null;
}
}
