DatabaseHelper.cs

using Parking_Tag_Picker_WRT.Models;
using SQLite;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Windows.ApplicationModel;
using Windows.Storage;

namespace Parking_Tag_Picker_WRT.Helpers
{
    public class DatabaseHelper
    {

        /// <summary>
        /// Load SQL_LiteTable from Solution   
        /// </summary>
        /// <param name="DB_PATH"></param>
        /// <returns></returns>
        public async Task<bool> Init(string dbPath)
        {


            bool isDatabaseExisting = false;

            try
            {
                StorageFile storageFile = await ApplicationData.Current.LocalFolder.GetFileAsync(dbPath);
                isDatabaseExisting = true;
            }
            catch
            {
                isDatabaseExisting = false;
            }

            if (!isDatabaseExisting)
            {
                StorageFile databaseFile = await Package.Current.InstalledLocation.GetFileAsync(dbPath);
                await databaseFile.CopyAsync(ApplicationData.Current.LocalFolder);
            }

            return true;          
        }

        

        /// <summary>
        ///  Retrieve the specific zone info from the database.   
        /// </summary>
        /// <param name="zoneId"></param>
        /// <returns></returns>
        public ZoneInfo ReadZone(int zoneId, string dbPath)
        {
            using (var dbConn = new SQLiteConnection(dbPath))
            {
                var existingZone = dbConn.Query<ZoneInfo>("select * from {0} where ObjectId ={1}", dbPath, zoneId).FirstOrDefault();
                return existingZone;
            }
        }


        /// <summary>
        ///  Retrieve zone info list from the database.   
        /// </summary>
        /// <returns></returns>
        public ObservableCollection<ZoneInfo> ReadZones(string dbPath)
        {
            using (var dbConn = new SQLiteConnection(dbPath))
            {
                List<ZoneInfo> zoneInfo = dbConn.Table<ZoneInfo>().ToList<ZoneInfo>();
                ObservableCollection<ZoneInfo> zoneInfoCollection = new ObservableCollection<ZoneInfo>(zoneInfo);
                return zoneInfoCollection;
            }
        }
    
        
    }
}