Example #1
0
        private async void Login_Clicked(object sender, EventArgs e)
        {
            string user = usernameEntry.Text;
            string pass = passwordEntry.Text;

            //Ensure the fields are all filled out.
            if (string.IsNullOrEmpty(user) || string.IsNullOrEmpty(pass))
            {
                await DisplayAlert("Error", "Please complete all fields.", "Ok");

                return;
            }

            //Ensure taking photo is enabled.
            if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
            {
                await DisplayAlert("Error", "No camera avaialble!", "Ok");

                return;
            }

            //Take photo.
            var file = await CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions
            {
                DefaultCamera = Plugin.Media.Abstractions.CameraDevice.Front,
                PhotoSize     = Plugin.Media.Abstractions.PhotoSize.Medium,
                Directory     = "User Images",
                Name          = "userImage"
            });

            //If no photo is taken, do nothing more.
            if (file == null)
            {
                return;
            }

            var loginsuccess = await SecureStorageService.IsLoginCorrect(user, pass);

            if (!loginsuccess)
            {
                await DisplayAlert("Failure", "Incorrect login details.", "Ok");

                return;
            }

            //Check with Azure Face API if the face is recognised.
            var faceRecognised = await FacialRecognitionService.IsFaceIdentified(user, file.GetStream());

            if (faceRecognised) //If recognised
            {
                await DisplayAlert("Success", "You have logged in.", "Ok");
            }
            else
            {
                await DisplayAlert("Failure", "Face not recognised.", "Ok");
            }

            file.Dispose();
        }
        private async void TakePhoto_Clicked(object sender, EventArgs e)
        {
            string user = usernameEntry.Text;
            string pass = passwordEntry.Text;

            var option = await DisplayActionSheet(null, "Cancel", null, "Take Photo", "Gallery");

            if (string.IsNullOrEmpty(option))
            {
                return;
            }

            if (string.IsNullOrEmpty(user) || string.IsNullOrEmpty(pass))
            {
                await DisplayAlert("Error", "Please complete the username and password fields first.", "Ok");

                return;
            }

            if (option.Equals("Take Photo")) //Take photo
            {
                //Take photo
                if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
                {
                    await DisplayAlert("Error", "No camera avaialble!", "Ok");

                    return;
                }

                var file = await CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions
                {
                    DefaultCamera = Plugin.Media.Abstractions.CameraDevice.Front,
                    PhotoSize     = Plugin.Media.Abstractions.PhotoSize.Medium,
                    Directory     = "User Images",
                    Name          = "userImage"
                });

                if (file == null)
                {
                    return;
                }

                //Send to Azure Face API to train.
                Guid trainingGuid = new Guid();
                trainingGuid = await FacialRecognitionService.AddNewFace(user, file.GetStream());

                //Then if training is successful,
                trainingDone.IsChecked = trainingGuid != Guid.Empty; //The guid will be not empty if the training is done

                file.Dispose();
            }
            else if (option.Equals("Gallery")) //Select from gallery
            {
                //Open gallery
                if (!CrossMedia.Current.IsPickPhotoSupported)
                {
                    await DisplayAlert("Error", "Permission not granted to photos!", "Ok");

                    return;
                }

                var file = await Plugin.Media.CrossMedia.Current.PickPhotoAsync(new Plugin.Media.Abstractions.PickMediaOptions
                {
                    PhotoSize = Plugin.Media.Abstractions.PhotoSize.Medium
                });


                if (file == null)
                {
                    return;
                }

                //Send to Azure Face API to train.
                Guid trainingGuid = new Guid();
                trainingGuid = await FacialRecognitionService.AddNewFace(user, file.GetStream());

                //Then if training is successful,
                trainingDone.IsChecked = trainingGuid != Guid.Empty; //The guid will be not empty if the training is done

                file.Dispose();
            }
        }