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Why won't wpf application start?
I decided to make a guide to the example from metanit on wpf. There are no errors, but the application does not start, passed the debugger, it gives an error:
System.Windows.Markup.XamlParseException: ""Вызов конструктора для типа "Phonebook.MainWindow", удовлетворяющего указанным ограничениям привязки, привел к выдаче исключения.": номер строки "6" и позиция в строке "9"."
SQLiteException: SQL logic error
no such table: Phones
using System.Data.Entity;
namespace Phonebook
{
public class ApplicationContext : DbContext
{
public ApplicationContext():base("DefaultConnection")
{
}
public DbSet<Phone> PhoneBook { get; set; }
}
}
using System.Collections.Generic;
using System.Data.Entity;
using System.Linq;
using System.Windows;
namespace Phonebook
{
public partial class MainWindow : Window
{
ApplicationContext db;
public MainWindow()
{
InitializeComponent();
db = new ApplicationContext();
db.PhoneBook.Load();
this.DataContext = db.PhoneBook.Local.ToBindingList();
}
// добавление
private void Add_Click(object sender, RoutedEventArgs e)
{
PhoneWindow phoneWindow = new PhoneWindow(new Phone());
if (phoneWindow.ShowDialog() == true)
{
Phone phone = phoneWindow.Phone;
db.PhoneBook.Add(phone);
db.SaveChanges();
}
}
// редактирование
private void Edit_Click(object sender, RoutedEventArgs e)
{
// если ни одного объекта не выделено, выходим
if (phonesList.SelectedItem == null) return;
// получаем выделенный объект
Phone phone = phonesList.SelectedItem as Phone;
PhoneWindow phoneWindow = new PhoneWindow(new Phone
{
Id = phone.Id,
Position = phone.Position,
PhoneNumber = phone.PhoneNumber,
Name = phone.Name,
Email = phone.Email,
Organisation = phone.Organisation
});
if (phoneWindow.ShowDialog() == true)
{
// получаем измененный объект
phone = db.PhoneBook.Find(phoneWindow.Phone.Id);
if (phone != null)
{
phone.Position = phoneWindow.Phone.Position;
phone.Name = phoneWindow.Phone.Name;
phone.PhoneNumber = phoneWindow.Phone.PhoneNumber;
phone.Email = phoneWindow.Phone.Email;
phone.Organisation = phoneWindow.Phone.Organisation;
db.Entry(phone).State = EntityState.Modified;
db.SaveChanges();
}
}
}
// удаление
private void Delete_Click(object sender, RoutedEventArgs e)
{
// если ни одного объекта не выделено, выходим
if (phonesList.SelectedItem == null) return;
// получаем выделенный объект
Phone phone = phonesList.SelectedItem as Phone;
db.PhoneBook.Remove(phone);
db.SaveChanges();
}
}
}
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You don't have a `Phones` table in your SQLite database. They themselves wrote English in white
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