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();
}
}
