I am using MVVM light. Initially I add two items; after that I am adding two more new items in the list, and calling the RaisePropertyChanged event; but it's not updating the list view, it's showing old items only. What is the problem in my code?
My Model
public class ViewPeopleModel
{
public event PropertyChangedEventHandler PropertyChanged;
private string _imageURL;
public string ImageURL
{
get
{
return _imageURL;
}
set
{
_imageURL = value;
OnPropertyChanged("ImageURL");
}
}
public void OnPropertyChanged(string property)
{
if (PropertyChanged != null)
{
PropertyChanged(this, new PropertyChangedEventArgs(property));
}
}
}
View Model
public class ViewPeopleViewModel : ViewModelBase
{
public ObservableCollection<ViewPeopleModel> ProfileList { get; set; }
public ViewPeopleViewModel()
{
ObservableCollection<ViewPeopleModel> _people = new ObservableCollection<ViewPeopleModel>();
_people.Add(new ViewPeopleModel { ImageURL = "url1" });
_people.Add(new ViewPeopleModel { ImageURL = "url2" });
ProfileList = _people;
RaisePropertyChanged("ProfileList");
}
public void AddNewPeople()
{
ObservableCollection<ViewPeopleModel> _people = new ObservableCollection<ViewPeopleModel>();
_people.Add(new ViewPeopleModel { ImageURL = "url5" });
_people.Add(new ViewPeopleModel { ImageURL = "url6" });
ProfileList = _people;
RaisePropertyChanged("ProfileList");
}
}
Try doing this in your AddNewPeople method
public void AddNewPeople()
{
ProfileList.Clear();
ProfileList.Add(new ViewPeopleModel{ ImageURL ="url5" });
ProfileList.Add(new ViewPeopleModel{ ImageURL ="url6" });
}
Related
I created a map with custom marker with real-time location update. But after adding a new pin to the map its not applying the custom renderer. If I zoomed-in or zoomed-out on the map its applying that custom renders for markers. Here is my code.
This Code is in Xamarin.Droid project
public class CustomMapRenderer : MapRenderer, IOnMapReadyCallback, GoogleMap.IInfoWindowAdapter
{
GoogleMap map;
List<Position> routeCoordinates;
List<CustomPin> customPins;
Action<CustomPin> onInfoWindowClicked;
public void OnMapReady(GoogleMap googleMap)
{
map = googleMap;
//map.InfoWindowClick += OnInfoWindowClick;
map.SetInfoWindowAdapter(this);
var polylineOptions = new PolylineOptions();
polylineOptions.InvokeColor(Android.Graphics.Color.Blue);
foreach (var position in routeCoordinates)
{
polylineOptions.Add(new LatLng(position.Latitude, position.Longitude));
}
map.AddPolyline(polylineOptions);
}
protected override void OnElementChanged(Xamarin.Forms.Platform.Android.ElementChangedEventArgs<Xamarin.Forms.View> e)
{
base.OnElementChanged(e);
if (e.OldElement != null)
{
map.InfoWindowClick -= OnInfoWindowClick;
// Unsubscribe
}
if (e.NewElement != null)
{
var formsMap = (CustomMap)e.NewElement;
routeCoordinates = formsMap.RouteCoordinates;
customPins = formsMap.CustomPins;
onInfoWindowClicked = formsMap.OnInfoWindowClicked;
((Android.Gms.Maps.MapView)Control).GetMapAsync(this);
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
base.OnElementPropertyChanged(sender, e);
if (map != null)
{
map.Clear();
foreach (var pin in customPins)
{
var marker = new MarkerOptions();
marker.SetPosition(new LatLng(pin.Pin.Position.Latitude, pin.Pin.Position.Longitude));
marker.SetTitle(pin.Id.ToString());
marker.SetSnippet(pin.Pin.Address);
if(pin.UserType == global::Common.Models.UserType.Driver)
{
marker.SetIcon(BitmapDescriptorFactory.FromResource(Resource.Drawable.car));
}
else if (pin.UserType == global::Common.Models.UserType.Rider)
{
marker.SetIcon(BitmapDescriptorFactory.FromResource(Resource.Drawable.person));
}
map.AddMarker(marker);
}
}
}
void OnInfoWindowClick(object sender, GoogleMap.InfoWindowClickEventArgs e)
{
onInfoWindowClicked(GetCustomPin(e.Marker));
}
private CustomPin GetCustomPin(Marker marker)
{
return customPins.Find(x => x.Id.ToString() ==marker.Title.ToString());
}
public Android.Views.View GetInfoContents(Marker marker)
{
var inflater = Android.App.Application.Context.GetSystemService(Context.LayoutInflaterService) as Android.Views.LayoutInflater;
if (inflater != null)
{
Android.Views.View view;
var customPin = GetCustomPin(marker);
if (customPin == null)
{
throw new Exception("Custom pin not found");
}
view = inflater.Inflate(Resource.Layout.MapInfoWindow, null);
var infoImage = view.FindViewById<ImageView>(Resource.Id.markerInfoImage);
var infoTitle = view.FindViewById<TextView>(Resource.Id.markerInfoTitle);
var infoSummary = view.FindViewById<TextView>(Resource.Id.markerInfoSummary);
System.IO.Stream ims = Context.Assets.Open(customPin.Image);
// load image as Drawable
Drawable d = Drawable.CreateFromStream(ims, null);
// set image to ImageView
infoImage.SetImageDrawable(d);
//File file = new File(customPin.Image);
//var image = Android.Net.Uri.FromFile(file);
//var resource=ResourceManager.GetDrawableByName("driverLogActive_icon.png");
//infoImage.SetImageResource(resource);
//infoImag = customPin.Title;
infoTitle.Text = customPin.Title;
infoSummary.Text = customPin.MobileNo;
return view;
}
return null;
}
public Android.Views.View GetInfoWindow(Marker marker)
{
return null;
}
}
This code is in Xamarin.Forms project
public class CustomPin
{
public Pin Pin { get; set; }
public Guid Id { get; set; }
public string Title { get; set; }
public string MobileNo { get; set; }
public string Image { get; set; }
public string UserName { get; set; }
public UserType UserType { get; set; }
}
public class CustomMap : Map
{
public static readonly BindableProperty RouteCoordinatesProperty = BindableProperty.Create(nameof(RouteCoordinates), typeof(List<Position>), typeof(CustomMap), new List<Position>(), BindingMode.TwoWay);
public static readonly BindableProperty CustomPinsProperty = BindableProperty.Create(nameof(CustomPins), typeof(List<CustomPin>), typeof(CustomMap), new List<CustomPin>(), BindingMode.TwoWay);
public List<CustomPin> CustomPins
{
get { return (List<CustomPin>)GetValue(CustomPinsProperty); }
set { SetValue(CustomPinsProperty, value); }
}
public List<Position> RouteCoordinates
{
get { return (List<Position>)GetValue(RouteCoordinatesProperty); }
set { SetValue(RouteCoordinatesProperty, value); }
}
public Action<CustomPin> OnInfoWindowClicked;
public CustomMap()
{
RouteCoordinates = new List<Position>();
CustomPins = new List<CustomPin>();
}
}
This is how I use the custom map to render pin in Xamrin.Fomrs project
private void RenderPin(string longitudeCoordinate, string latitudeCoordinate,bool canMoveToLoacation, string lable,UserType userType,string mobileNo,string image,string userName)
{
double latitude = 0;
double longitude = 0;
double.TryParse(latitudeCoordinate, out latitude);
double.TryParse(longitudeCoordinate, out longitude);
var position = new Position(latitude, longitude);
var pin = new CustomPin
{
Pin = new Pin
{
Type = PinType.Place,
Position = position,
Label = lable,
},
Title = lable,
UserType = userType,
MobileNo = "Mobile No:" + mobileNo,
Image = "profile_images/" + image,
UserName = userName,
Id = Guid.NewGuid()
};
map.CustomPins.Add(pin);
map.Pins.Add(pin.Pin);
if (canMoveToLoacation)
{
map.MoveToRegion(MapSpan.FromCenterAndRadius(new Position(latitude, longitude), Distance.FromKilometers(2)));
}
}
If you install the Xamarin.Forms.Maps pre-release (2.3.5.255-pre5), you can now just override the CreateMarker() method in MapRenderer. It's much more elegant, and it fixes this problem with pins not being updated when added after map creation.
Has anyone integrated Google Place Autocomplete using Xamarin.Forms? I am to use it on a map for location suggestions. I've only seen resources for Xamarin.Android and Xamarin.iOS but on the part of implementing the AutoCompleteView, that I also don't know. I would be very thankful if someone could guide me with this. Thank you!
Place autocomplete can be implemented by using the Google Place API, whenever user enter a character, matching location with the entered character will be fetched from the Google server and binding back in User Interface.
Here's the link how to use Google Map Place API in Xamarin form:
http://www.appliedcodelog.com/2015/05/google-place-api-with-autocomplete-in.html
Also, please read the Official Google Places API Web Service:
https://developers.google.com/places/web-service/autocomplete
For iOS
[assembly: ExportRenderer(typeof(CustomAutoCompleteLocation), typeof(CustomAutoCompleteRenderer))]
namespace Aesthetic.iOS.Renderer
{
public class CustomAutoCompleteProfileRenderer : EntryRenderer
{
IntPtr inptr;
string tx = "1";
CustomAutoCompleteLocation _view;
Place place;
UITextField textView;
public UIWindow Window
{
get;
set;
}
protected override void OnElementChanged(ElementChangedEventArgs<Entry> e)
{
base.OnElementChanged(e);
_view = (CustomAutoCompleteLocation)Element;
if (Control != null)
{
textView = (UITextField)Control;
textView.Font = UIFont.FromName("Lato-Light", textView.Font.PointSize);
textView.BorderStyle = UITextBorderStyle.Line;
textView.Layer.BorderWidth = 1f;
textView.Layer.CornerRadius = 0f;
// do whatever you want to the textField here!
UIView paddingView = new UIView(new RectangleF(10, 16, 10, 16));
textView.LeftView = paddingView;
textView.LeftViewMode = UITextFieldViewMode.Always;
}
}
protected override void OnElementPropertyChanged(object sender, PropertyChangedEventArgs e)
{
var x = sender as CustomAutoComplete;
if (e.PropertyName == "IsFocused")
{
if (tx == "1")
{
Device.BeginInvokeOnMainThread(() =>
{
Window = new UIWindow(UIScreen.MainScreen.Bounds);
var controller = new LocationViewController();
Window.RootViewController = controller;
// make the window visible
Window.MakeKeyAndVisible();
controller.PlaceSelected1 += HandlePlaceSelection;
});
tx = "2";
}
else if (tx == "2") tx = "3";
else if (tx == "3") tx = "4";
else if (tx == "4") tx = "1";
}
}
private void HandlePlaceSelection(object sender, string locationData)
{
textView.Text = locationData;
Window.Hidden = true;
}
}
}
And this is location view controller
public partial class LocationViewController : UIViewController
{
public delegate void PlaceSelected(object sender, string locationData);
UITextField txtLocation;
public UIView backgroundView;
// UITextView txtLocation;
UIImageView googleAttribution;
UITableView tableViewLocationAutoComplete;
public event PlaceSelected PlaceSelected1;
public string strSampleString { get; set; }
LocationPredictionClass objAutoCompleteLocationClass;
string strAutoCompleteQuery;
LocationAutoCompleteTableSource objLocationAutoCompleteTableSource;
public LocationViewController() : base()
{
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
FnInitializeView();
FnClickEventInit();
}
void FnInitializeView()
{
backgroundView = new UIView(View.Frame);
backgroundView.BackgroundColor = UIColor.White;
View.AddSubview(backgroundView);
txtLocation = new UITextField();
txtLocation.Frame = new CoreGraphics.CGRect(20, 20, View.Frame.Width-20, 45.0f);
txtLocation.TranslatesAutoresizingMaskIntoConstraints = false;
txtLocation.ReturnKeyType = UIReturnKeyType.Done;
txtLocation.BackgroundColor = UIColor.FromRGB(221,221,221);
txtLocation.TextColor = UIColor.Black;
View.AddSubview(txtLocation);
txtLocation.BecomeFirstResponder();
tableViewLocationAutoComplete = new UITableView();
tableViewLocationAutoComplete.Frame = new CoreGraphics.CGRect(txtLocation.Frame.X, txtLocation.Frame.Height+ txtLocation.Frame.Y, View.Frame.Width, View.Frame.Height - txtLocation.Frame.Height - txtLocation.Frame.Y);
tableViewLocationAutoComplete.BackgroundColor = UIColor.White;
tableViewLocationAutoComplete.Source = objLocationAutoCompleteTableSource;
View.AddSubview(tableViewLocationAutoComplete);
tableViewLocationAutoComplete.Hidden = false;
txtLocation.ShouldReturn += (textField) => textField.ResignFirstResponder();
StringBuilder builderLocationAutoComplete = new StringBuilder(Constants.strPlacesAutofillUrl);
builderLocationAutoComplete.Append("?input={0}").Append("&key=").Append(Constants.strGooglePlaceAPILey);
strAutoCompleteQuery = builderLocationAutoComplete.ToString();
builderLocationAutoComplete.Clear();
builderLocationAutoComplete = null;
}
void FnClickEventInit()
{
txtLocation.EditingChanged += async delegate (object sender, EventArgs e)
{
if (string.IsNullOrWhiteSpace(txtLocation.Text))
{
tableViewLocationAutoComplete.Hidden = true;
}
else
{
if (txtLocation.Text.Length > 2)
{
//Autofill
string strFullURL = string.Format(strAutoCompleteQuery, txtLocation.Text);
objAutoCompleteLocationClass = await RestRequestClass.LocationAutoComplete(strFullURL);
if (objAutoCompleteLocationClass != null && objAutoCompleteLocationClass.status == "OK")
{
if (objAutoCompleteLocationClass.predictions.Count > 0)
{
if (objLocationAutoCompleteTableSource != null)
{
objLocationAutoCompleteTableSource.LocationRowSelectedEventAction -= LocationSelectedFromAutoFill;
objLocationAutoCompleteTableSource = null;
}
tableViewLocationAutoComplete.Hidden = false;
objLocationAutoCompleteTableSource = new LocationAutoCompleteTableSource(objAutoCompleteLocationClass.predictions);
objLocationAutoCompleteTableSource.LocationRowSelectedEventAction += LocationSelectedFromAutoFill;
tableViewLocationAutoComplete.Source = objLocationAutoCompleteTableSource;
tableViewLocationAutoComplete.ReloadData();
}
else
tableViewLocationAutoComplete.Hidden = true;
}
else
{
tableViewLocationAutoComplete.Hidden = true;
}
}
}
};
}
void LocationSelectedFromAutoFill(Prediction objPrediction)
{
DismissViewController(true, null);
Console.WriteLine(objPrediction.description);
PlaceSelected1(this, objPrediction.description);
txtLocation.ResignFirstResponder();
}
}
public class RestRequestClass
{
static async Task<string> CallService(string strURL)
{
WebClient client = new WebClient();
string strResult;
try
{
strResult = await client.DownloadStringTaskAsync(new Uri(strURL));
}
catch
{
strResult = "Exception";
}
finally
{
client.Dispose();
client = null;
}
return strResult;
}
internal static async Task<LocationPredictionClass> LocationAutoComplete(string strFullURL)
{
LocationPredictionClass objLocationPredictClass = null;
LocationPredictionClass objLocationPredictClass12 = new LocationPredictionClass();
objLocationPredictClass12.predictions = new List<Prediction>();
string strResult = await CallService(strFullURL);
if (strResult != "Exception")
{
objLocationPredictClass = JsonConvert.DeserializeObject<LocationPredictionClass>(strResult);
}
foreach (Prediction objPred in objLocationPredictClass.predictions)
{
if (objPred.types[0] == "country")
{
objLocationPredictClass12.predictions.Add(objPred);
objLocationPredictClass12.status = "OK";
}
}
// string[] strPredictiveText = new string[data.Count];
//int index = 0;
// foreach (Prediction objPred in data)
// {
// strPredictiveText[index] = objPred.description;
// index++;
// }
return objLocationPredictClass12;
}
}
public class MatchedSubstring
{
public int length { get; set; }
public int offset { get; set; }
}
public class Term
{
public int offset { get; set; }
public string value { get; set; }
}
public class Prediction
{
public string description { get; set; }
public string id { get; set; }
public List<MatchedSubstring> matched_substrings { get; set; }
public string place_id { get; set; }
public string reference { get; set; }
public List<Term> terms { get; set; }
public List<string> types { get; set; }
}
public class LocationPredictionClass
{
public List<Prediction> predictions { get; set; }
public string status { get; set; }
}
public class Constants
{
public static string strGooglePlaceAPILey = "AIzaSyBXJntNIs2aAvKIRwrgCEwOGwnigbSWep8";
public static string strPlacesAutofillUrl = "https://maps.googleapis.com/maps/api/place/autocomplete/json";
}
public class LocationAutoCompleteTableSource : UITableViewSource
{
const string strCellIdentifier = "Cell";
readonly List<Prediction> lstLocations;
internal event Action<Prediction> LocationRowSelectedEventAction;
public LocationAutoCompleteTableSource(List<Prediction> arrItems)
{
lstLocations = arrItems;
}
public override nint RowsInSection(UITableView tableview, nint section)
{
return lstLocations.Count;
}
public override UIView GetViewForFooter(UITableView tableView, nint section)
{
return new UIView();
}
public override UITableViewCell GetCell(UITableView tableView, Foundation.NSIndexPath indexPath)
{
UITableViewCell cell = tableView.DequeueReusableCell(strCellIdentifier) ?? new UITableViewCell(UITableViewCellStyle.Default, strCellIdentifier);
cell.TextLabel.Text = lstLocations[indexPath.Row].description;
cell.TextLabel.Font = UIFont.SystemFontOfSize(12);
return cell;
}
public override void RowSelected(UITableView tableView, Foundation.NSIndexPath indexPath)
{
if (LocationRowSelectedEventAction != null)
{
LocationRowSelectedEventAction(lstLocations[indexPath.Row]);
}
tableView.DeselectRow(indexPath, true);
}
}
}
I have implemented recyclerview in my application and now i need to fetch data from the server and i just came to know about volley being the best way to fetch data. I searched online but i am unable to find a proper tutorial for the same.
This is how i initialized the recyclerview in my code.(which has hardcoded data set)
mRecyclerView = (RecyclerView) findViewById(R.id.recyclerview);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this);
linearLayoutManager.setOrientation(LinearLayoutManager.VERTICAL);
mRecyclerView.setLayoutManager(linearLayoutManager);
mAdapter = new CardAdapter();
mRecyclerView.setAdapter(mAdapter);
here is the adapter code.
public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> {
ArrayList<BusRouteNameDetails> mItems;
public int TAG=0;
public CardAdapter() {
super();
mItems = new ArrayList<>();
BusRouteNameDetails routename = new BusRouteNameDetails();
routename.setName("xyz");
routename.setNumber("X4");
mItems.add(routename);
routename = new BusRouteNameDetails();
routename.setName("xyz");
routename.setNumber("X4");
mItems.add(routename);
routename = new BusRouteNameDetails();
routename.setName("xyz");
routename.setNumber("X4");
mItems.add(routename);
routename = new BusRouteNameDetails();
routename.setName("xyz");
routename.setNumber("X4");
mItems.add(routename);
routename = new BusRouteNameDetails();
routename.setName("xyz");
routename.setNumber("X4");
mItems.add(routename);
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
View v = LayoutInflater.from(viewGroup.getContext())
.inflate(R.layout.busroutename_list, viewGroup, false);
ViewHolder viewHolder = new ViewHolder(v);
return viewHolder;
}
#Override
public void onBindViewHolder(ViewHolder viewHolder, int i) {
BusRouteNameDetails routename = mItems.get(i);
viewHolder.tvName.setText(routename.getName());
viewHolder.tvRoutename.setText(routename.getNumber());
Log.e("TAG","i value="+ i);
if(i==mItems.size()-1)
viewHolder.seperator.setVisibility(View.INVISIBLE);
}
#Override
public int getItemCount() {
Log.e("TAG","item size"+ mItems.size());
return mItems.size();
}
class ViewHolder extends RecyclerView.ViewHolder{
public TextView tvName;
public TextView tvRoutename;
public View seperator;
public ViewHolder(View itemView) {
super(itemView);
tvName = (TextView)itemView.findViewById(R.id.RouteName1);
tvRoutename = (TextView)itemView.findViewById(R.id.Route_src_dest);
seperator=(View)itemView.findViewById(R.id.seperator);
}
}
}
And here are the getters and setters
public class BusRouteNameDetails {
private String mName;
private String mNumber;
public String getName() {
return mName;
}
public void setName(String name) {
this.mName = name;
}
public String getNumber() {
return mNumber;
}
public void setNumber(String Number) {
this.mNumber = Number;
}
}
You can try as my following solution:
Let's assume the server response as the following JSON:
[
{
"name": "Person 1",
"age": 30
},
{
"name": "Person 2",
"age": 20
},
{
"name": "Person 3",
"age": 40
}
]
In your Android project:
public class Person {
String name;
Integer age;
Person() {
}
}
public class RVAdapter extends RecyclerView.Adapter<RVAdapter.PersonViewHolder> {
List<Person> persons;
RVAdapter(List<Person> persons) {
this.persons = persons;
}
#Override
public PersonViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.cardview, parent, false);
PersonViewHolder pvh = new PersonViewHolder(v);
return pvh;
}
#Override
public void onBindViewHolder(PersonViewHolder holder, int position) {
holder.personName.setText(persons.get(position).name);
holder.personAge.setText(String.valueOf(persons.get(position).age));
}
#Override
public int getItemCount() {
if (persons != null) {
return persons.size();
}
return 0;
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
super.onAttachedToRecyclerView(recyclerView);
}
public static class PersonViewHolder extends RecyclerView.ViewHolder {
CardView cv;
TextView personName;
TextView personAge;
PersonViewHolder(View itemView) {
super(itemView);
cv = (CardView) itemView.findViewById(R.id.cv);
personName = (TextView) itemView.findViewById(R.id.person_name);
personAge = (TextView) itemView.findViewById(R.id.person_age);
}
}
}
Then in your Activity:
...
RecyclerView rv = (RecyclerView)findViewById(R.id.rv);
rv.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(mContext);
rv.setLayoutManager(llm);
final RVAdapter rvAdapter = new RVAdapter(personList);
rv.setAdapter(rvAdapter);
RequestQueue requestQueue = Volley.newRequestQueue(mContext);
String url = "http://192.16.1.100/api/persons";
JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(url, new Response.Listener<JSONArray>() {
#Override
public void onResponse(JSONArray response) {
try {
if (response.length() > 0) {
personList.clear();
for (int i = 0; i < response.length(); i++) {
JSONObject jsonObject = response.getJSONObject(i);
Person person = new Person();
if (!jsonObject.isNull("name")) {
person.name = jsonObject.getString("name");
}
if (!jsonObject.isNull("age")) {
person.age = jsonObject.getInt("age");
}
personList.add(i, person);
}
rvAdapter.notifyDataSetChanged();
}
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
#Override
public void onErrorResponse(VolleyError error) {
// do something
}
});
requestQueue.add(jsonArrayRequest);
...
Here is the result
Hope this helps!
I want to store information from the NFC tag I read and store in the database and show it all in another page but I am having problem in using implementing sqlite.I cant add the information to the database using sqlite.
Below is my checkin class from where I read from the NFC tag
public partial class Checkin : PhoneApplicationPage
{
private ProximityDevice _device;
private long _subscriptionIdNdef;
public static double Latitud_do { get; set; }
public static double Longtitude_do { get; set; }
public static string latitude { get; set; }
public static string longtitude { get; set; }
public static string Floor_st { get; set; }
public static string Zone_st { get; set; }
History store = new History();
public Checkin()
{
InitializeProximityDevice();
InitializeComponent();
}
private void SetLogStatus(string newStatus)
{
Dispatcher.BeginInvoke(() => { if (LogStatus != null) LogStatus.Text = newStatus; });
}
private void SetFloorStatus(string newStatus)
{
Dispatcher.BeginInvoke(() => { if (FloorStatus != null) FloorStatus.Text = newStatus; });
}
private void ApplicationBarIconButton_Click(object sender, System.EventArgs e)
{
MessageBox.Show(" ");
}
private void InitializeProximityDevice()
{
_device = Windows.Networking.Proximity.ProximityDevice.GetDefault();
if (_device != null)
{
_subscriptionIdNdef = _device.SubscribeForMessage("NDEF", MessageReceivedHandler);
}
}
private void MessageReceivedHandler(ProximityDevice sender, ProximityMessage message)
{
var rawMsg = message.Data.ToArray();
var ndefMessage = NdefMessage.FromByteArray(rawMsg);
////// Loop over all records contained in the NDEF message
foreach (NdefRecord record in ndefMessage)
{
if (NdefTextRecord.IsRecordType(record))
{
// Convert and extract URI info
var textRecord = new NdefTextRecord(record);
string[] str = textRecord.Text.Split('|');
var Floor_st = str[0];
var Zone_st = str[1];
var latitude = str[2];
var longtitude = str[3];
Latitud_do = double.Parse(latitude);
Longtitude_do = double.Parse(longtitude);
SetLogStatus("Floor: " + Floor_st + " Zone: " + Zone_st );
SetFloorStatus("Longitude: " + latitude + " Longitude: " + longtitude);
//store.AddDb(Floor_st, Zone_st, Latitud_do, Longtitude_do);
}
}
}
}
Below here is the main dbhelper class for the main sqlite functions
public class DbHelper
{
SQLiteConnection dbConn;
public async Task<bool> onCreate(string DB_PATH)
{
try
{
if (!CheckFileExists(DB_PATH).Result)
{
using (dbConn = new SQLiteConnection(DB_PATH))
{
dbConn.CreateTable<historyTableSQlite>();
}
}
return true;
}
catch
{
return false;
}
}
private async Task<bool> CheckFileExists(string fileName)
{
try
{
var store = await Windows.Storage.ApplicationData.Current.LocalFolder.GetFileAsync(fileName);
return true;
}
catch
{
return false;
}
}
//retrieve all list from the database
public ObservableCollection<historyTableSQlite> ReadHistory()
{
using (var dbConn = new SQLiteConnection(App.DB_PATH))
{
List<historyTableSQlite> myCollection = dbConn.Table<historyTableSQlite>().ToList<historyTableSQlite>();
ObservableCollection<historyTableSQlite> HistoryList = new ObservableCollection<historyTableSQlite>(myCollection);
return HistoryList;
}
}
// Insert the new info in the histrorytablesqlite table.
public void Insert(historyTableSQlite newcontact)
{
using (var dbConn = new SQLiteConnection(App.DB_PATH))
{
dbConn.RunInTransaction(() =>
{
dbConn.Insert(newcontact);
});
}
}
}
below is the class from where I read all the information
public class ReadAllContactsList
{
DbHelper Db_Helper = new DbHelper();
public ObservableCollection<historyTableSQlite> GetAllHistory()
{
return Db_Helper.ReadHistory();
}
}
}
And last is the class where I want to show all the information I have stored
ublic partial class History : PhoneApplicationPage
{
// string dbPath = Path.Combine(Windows.Storage.ApplicationData.Current.LocalFolder.Path, "db.sqlite");
ObservableCollection<historyTableSQlite> DB_HistoryList = new ObservableCollection<historyTableSQlite>();
public History()
{
InitializeComponent();
}
private void ReadHistoryList_Loaded(object sender, RoutedEventArgs e)
{
ReadAllContactsList dbhistory = new ReadAllContactsList();
DB_HistoryList = dbhistory.GetAllHistory();//Get all DB contacts
ListData.ItemsSource = DB_HistoryList.OrderByDescending(i => i.Id).ToList();//Latest contact ID can Display first
}
public void AddInfo(object sender, RoutedEventArgs e)
{
DbHelper Db_helper = new DbHelper();
Db_helper.Insert(new historyTableSQlite(
));
}
}
I followed the following post but still struglling
http://bsubramanyamraju.blogspot.com/2014/08/windowsphone-8-sqlite-storing-data-in.html
Thank you for your help in advance
I am trying to retrieve selectedItems from a lispicker in multiSelection mode. Data appears in FullModelItemTemplate but when I select items, I am unable to get the values. Here is my ListPicker XAML
<toolkit:ListPicker x:Name="location" ItemsSource="{Binding Items,Mode=TwoWay}" ItemTemplate="{StaticResource DataTemplate2}" FullModeItemTemplate="{StaticResource DataTemplate3}" HeaderTemplate="{StaticResource header}" SelectionMode="Multiple" SelectedItems="{Binding SelectedItem,Mode=TwoWay}" >
MainViewModel
public class MainViewModel : ViewModelBase, INotifyPropertyChanged
{
public ObservableCollection<ItemViewModel> Items { get; private set; }
public MainViewModel()
{
Items = new ObservableCollection<ItemViewModel>();
LoadData();
}
public const string SelectedItemPropertyName = "SelectedItem";
private ObservableCollection<ItemViewModel> selectedItem;
public ObservableCollection<ItemViewModel> SelectedItem
{
get
{
return selectedItem;
}
set
{
if (value != selectedItem)
{
selectedItem = value;
NotifyPropertyChanged(SelectedItemPropertyName);
}
}
}
public void LoadData()
{
// Sample data; replace with real data
this.Items.Add(new ItemViewModel() { ID = "0", Cuisine = "Thai", CuisineImg = "Assets/Images/thsi.png", Location = "Shantinagar" });
this.Items.Add(new ItemViewModel() { ID = "1", Cuisine = "Indian", CuisineImg = "Assets/Images/indian.png", Location = "Mirpur" });
this.Items.Add(new ItemViewModel() { ID = "2", Cuisine = "Chinese", CuisineImg = "Assets/Images/chinese.png", Location = "Dhanmondi" });
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(String propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (null != handler)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
}
ItemViewModel
public class ItemViewModel : INotifyPropertyChanged
{
private string _id;
public string ID
{
get
{
return _id;
}
set
{
if (value != _id)
{
_id = value;
NotifyPropertyChanged("ID");
}
}
}
private string _location;
public string Location
{
get
{
return _location;
}
set
{
if (value != _location)
{
_location = value;
NotifyPropertyChanged("Location");
}
}
}
private string _cuisine;
public string Cuisine
{
get
{
return _cuisine;
}
set
{
if (value != _cuisine)
{
_cuisine = value;
NotifyPropertyChanged("Cuisine");
}
}
}
private string _cuisineImg;
public string CuisineImg
{
get
{
return _cuisineImg;
}
set
{
if (value != _cuisineImg)
{
_cuisineImg = value;
NotifyPropertyChanged("CuisineImg");
}
}
}
public event PropertyChangedEventHandler PropertyChanged;
private void NotifyPropertyChanged(String propertyName)
{
PropertyChangedEventHandler handler = PropertyChanged;
if (null != handler)
{
handler(this, new PropertyChangedEventArgs(propertyName));
}
}
Note that I am using MVVM light and if the selectionMode is single I face no problems fetching the selected value but multipleSelection mode is causing trouble