Errors in the existing database in the project Xamarin !

Question

Hi guys

I'm gonna use my existing database in the project but I get an error

I used "https://www.nuget.org/packages/sqlite-net-pcl" in my project

 

 

 

 

 this DB class :

 

public static SQLiteConnection sqliteCon()
        {
            string path = Environment.GetFolderPath(Environment.SpecialFolder.Personal);
            string dbPath = Path.Combine(path, "fitnessDBupdate.db");
            CopyDatabaseIfNotExists(dbPath);
            using (var conn = new SQLiteConnection(dbPath, true))
            {
                return conn;
            }
        }

        public bool createMembers()
        {
            try
            {
                using (var conn = sqliteCon())
                {
                    conn.CreateTable<Members>();
                }
                return true;
            }
            catch (SQLiteException ex)
            {
                Log.Info("SQLite EX", ex.ToString());
                return false;
            }
        }

        private static void CopyDatabaseIfNotExists(string dbPath)
        {
            try
            {
                string dbName = "fitnessDBupdate.db";
                dbPath = Path.Combine(Android.OS.Environment.ExternalStorageDirectory.ToString(), dbName);
                // Check if your DB has already been extracted.
                if (!File.Exists(dbPath))
                {
                    using (BinaryReader br = new BinaryReader(Application.Context.Assets.Open(dbName)))
                    {
                        using (BinaryWriter bw = new BinaryWriter(new FileStream(dbPath, FileMode.Create)))
                        {
                            byte[] buffer = new byte[2048];
                            int len = 0;
                            while ((len = br.Read(buffer, 0, buffer.Length)) > 0)
                            {
                                bw.Write(buffer, 0, len);
                            }
                        }
                    }
                }
            }
            catch (SQLiteException ex)
            {
                Log.Info("SQLite Ex", ex.ToString());
            }
        }

 and in login activity :

using Android.App;
using Android.OS;
using Android.Widget;
using ExsitingSQLite.Resources.DataHelper;
using System;
using System.Linq;

namespace ExsitingSQLite
{
    [Activity(Label = "ExsitingSQLite", MainLauncher = true, Icon = "@drawable/icon")]
    public class MainActivity : Activity
    {
        Button btnRegister;
        Button btnLog;
        EditText edtName;
        EditText edtPass;

        DataBase db;

        protected override void OnCreate(Bundle bundle)
        {
            base.OnCreate(bundle);
            SetContentView(Resource.Layout.Main);
            // ????? ????? ??
            btnRegister = FindViewById<Button>(Resource.Id.btnRegisterPage);
            btnLog = FindViewById<Button>(Resource.Id.btnLogin);
            edtName = FindViewById<EditText>(Resource.Id.edtName);
            edtPass = FindViewById<EditText>(Resource.Id.edtPass);
            // ????????
            btnRegister.Click += btnRegister_Click;
            btnLog.Click += btnLog_Click;
        }

        private void btnLog_Click(object sender, EventArgs e)
        {
            db = new DataBase();
            var data = db.listMembers();
            var data2 = data.Where(x => x.fullName == edtName.Text && x.password == edtPass.Text).FirstOrDefault(); //Linq Query
            if (data2 != null)
            {
                StartActivity(typeof(HomeActivity));
            }
            else
            {
                Toast.MakeText(this, "??? ?????? ?? ???? ???? ?? ????? ???", ToastLength.Short).Show();
            }
        }

        private void btnRegister_Click(object sender, EventArgs e)
        {
            StartActivity(typeof(RegisterActivity));
        }
    }
}

thanks