public void Do(string param, Book b, bool reverse = false)
{
try
{
switch (param)
{
case "delete":
using (var c = new Context())
{
var temp = c.Books.Include("Author").Include("Genre").First(p => p.Title == b.Title && p.Author.Name == b.Author.Name && p.Year == b.Year);
RemoveBookFromDB(temp.Id);
if (reverse)
{
Undos.Push(new object[] { "add", temp });
OnPropertyChanged("UndoIsEnabled");
}
else
{
Redos.Push(new object[] { "add", temp });
OnPropertyChanged("RedoIsEnabled");
}
}
break;
case "add":
using (var c = new Context())
{
AddBookToDB(b);
if (reverse)
{
Undos.Push(new object[] { "delete", b });
OnPropertyChanged("UndoIsEnabled");
}
else
{
try
{
if ((string)(Undos.Peek()[0]) == "unedit")
{
Undos.Pop();
OnPropertyChanged("UndoIsEnabled");
}
}
catch { }
Redos.Push(new object[] { "delete", b });
OnPropertyChanged("RedoIsEnabled");
}
}
break;
case "unedit":
using (var c = new Context())
{
var temp = c.Books.Include("Author").Include("Genre").First(p => p.Id == b.Id);
if (reverse)
{
Undos.Push(new object[] { "edit", temp.Clone() });
OnPropertyChanged("UndoIsEnabled");
}
else
{
Redos.Push(new object[] { "edit", temp.Clone() });
OnPropertyChanged("RedoIsEnabled");
}
temp.PullChanges(b);
if (temp.Author != null)
{
var k = c.Authors.FirstOrDefault(p => p.Name == temp.Author.Name);
if (k != null) { temp.Author = k; }
}
if (temp.Genre != null)
{
var t = c.Genres.FirstOrDefault(p => p.Name == temp.Genre.Name);
if (t != null) { temp.Genre = t; }
}
c.SaveChanges();
}
break;
case "edit":
using (var c = new Context())
{
var temp = c.Books.Include("Author").Include("Genre").First(p => p.Id == b.Id);
if (reverse)
{
Undos.Push(new object[] { "unedit", temp.Clone() });
OnPropertyChanged("UndoIsEnabled");
}
else
{
Redos.Push(new object[] { "unedit", temp.Clone() });
OnPropertyChanged("RedoIsEnabled");
}
temp.PullChanges(b);
if (temp.Author != null)
{
var k = c.Authors.FirstOrDefault(p => p.Name == temp.Author.Name);
if (k != null) { temp.Author = k; }
}
if (temp.Genre != null)
{
var t = c.Genres.FirstOrDefault(p => p.Name == temp.Genre.Name);
if (t != null) { temp.Genre = t; }
}
c.SaveChanges();
}
break;
default:
break;
}
}
catch { MessageBox.Show("Последнняя вызванная вами команда могла привести к ошибке во временном пространстве.\n\n \"Мы вновь спасли этот грешный мир\" - Ваша команда разработчиков"); }
OpenList(SelectedMode);
}
private void AddBookToDB(Book b)
{
using (var c = new Context())
{
if (b.Author != null)
{
var k = c.Authors.FirstOrDefault(p => p.Name == b.Author.Name);
if (k != null) { b.Author = k; }
}
if (b.Genre != null)
{
var t = c.Genres.FirstOrDefault(p => p.Name == b.Genre.Name);
if (t != null) { b.Genre = t; }
}
c.Books.Add(b);
c.SaveChanges();
}
}
public void OnAdd(Book obj)
{
bb.Add(obj);
dataGrid2.Dispatcher.BeginInvoke(DispatcherPriority.Normal, new Action(() => dataGrid2.Items.Refresh()));
}