public static void DeleteItem(IBookCatalogItem itemToDelete)
{
BookCatalog bookCatalog = new BookCatalog( );
DeleteItem(bookCatalog, itemToDelete);
bookCatalog.SubmitChanges( );
}
public void ShowDialog(UIElement parent, ItemType type, IBookCatalogItem dataToEdit, Action <bool> completed)
{
BookCatalog = new BookCatalog( );
parentDetails = parent;
completeAction = completed;
SetupData(type, dataToEdit);
parentDetails.IsEnabled = false;
Visibility = Visibility.Visible;
}
private void SetupData(ItemType type, IBookCatalogItem dataToEdit)
{
if (dataToEdit == null)
{
dataItem = Catalog.AddNewItem(BookCatalog, type);
}
else
{
dataItem = Catalog.GetExistingItem(BookCatalog, dataToEdit);
}
BindDataToEditForm( );
LoadAssociatedLists( );
}
public static IBookCatalogItem GetExistingItem(BookCatalog bookCatalog, IBookCatalogItem dataItem)
{
if (dataItem is Author)
{
return(bookCatalog.Authors.Single(author => author == dataItem as Author));
}
if (dataItem is Book)
{
return(bookCatalog.Books.Single(book => book == dataItem as Book));
}
if (dataItem is Category)
{
return(bookCatalog.Categories.Single(category => category == dataItem as Category));
}
throw new Exception("Unknown data type");
}
public static void DeleteItem(BookCatalog bookCatalog, IBookCatalogItem itemToDelete)
{
if (!itemToDelete.CanDelete( ))
{
return;
}
IBookCatalogItem dataItem = GetExistingItem(bookCatalog, itemToDelete);
if (dataItem is Author)
{
bookCatalog.Authors.DeleteOnSubmit(dataItem as Author);
}
if (dataItem is Book)
{
bookCatalog.Books.DeleteOnSubmit(dataItem as Book);
}
if (dataItem is Category)
{
bookCatalog.Categories.DeleteOnSubmit(dataItem as Category);
}
}
public static IBookCatalogItem AddNewItem(BookCatalog bookCatalog, ItemType type)
{
IBookCatalogItem dataItem = null;
if (type == ItemType.Author)
{
dataItem = new Author( );
bookCatalog.Authors.InsertOnSubmit(dataItem as Author);
}
if (type == ItemType.Book)
{
dataItem = new Book( );
bookCatalog.Books.InsertOnSubmit(dataItem as Book);
}
if (type == ItemType.Category)
{
dataItem = new Category( );
bookCatalog.Categories.InsertOnSubmit(dataItem as Category);
}
return(dataItem);
}
public static IBookCatalogItem GetExistingItem(IBookCatalogItem dataItem)
{
return(GetExistingItem(new BookCatalog( ), dataItem));
}
