private void btn_crypter_Click(object sender, RoutedEventArgs e)
        {
            DatabaseHelperClass dbHelper;
            Button btn = (Button)sender;
            String typeCrypt;

            switch (btn.Name)
                {
                    case "btn_crypter":
                        typeCrypt = CRYPTER; break;
                    case "btn_decrypter":
                        typeCrypt = DECRYPTER; break;
                    default:
                        typeCrypt = ""; break;
                }

            if (txt_text.Text != "" & txt_password.Text != "" & typeCrypt!="" )
            {
                dbHelper = new DatabaseHelperClass();//Creating object for DatabaseHelperClass.cs from ViewModel/DatabaseHelperClass.cs
                Record record = new Record(txt_text.Text, txt_password.Text, typeCrypt);
                dbHelper.Insert(record);
                txt_result.Text = record.result;
                //after add contact redirect to contact listbox page
                //Frame.Navigate(typeof(ReadContactList));
            }
            else
            {
                //await new MessageDialog(ERREUR).ShowAsync();
            }
        }
 // Insert the new record in the Record table.   
 public void Insert(Record newRecord)
 {
     using (var dbConn = new SQLiteConnection(App.DB_PATH))
     {
         dbConn.RunInTransaction(() =>
         {
             dbConn.Insert(newRecord);
         });
     }
 }
 //Delete specific record   
 public void DeleteRecord(Record record)
 {
     using (var dbConn = new SQLiteConnection(App.DB_PATH))
     {
         if (record.id != null)
         {
             dbConn.RunInTransaction(() =>
             {
                 dbConn.Delete(record);
             });
         }
     }
 }