private void bookToolStripMenuItem1_Click(object sender, EventArgs e)
{
List <LibraryItem> items; // List of Items
items = _lib.GetItemsList(); // gets list of items from library
EditBookForm editBookForm = new EditBookForm(items); // pass items to the form
BookForm editSelectedBook = new BookForm(); // create new book form
DialogResult result = editBookForm.ShowDialog(); // Show form as dialog and store result
// ensure user clicked OK
if (result == DialogResult.OK)
{
try
{
int bookCopyrightYear; // holds copyright year
int bookLoanPeriod; // holds load period
LibraryBook selectedItem = (LibraryBook)items[editBookForm.ItemIndex]; // stores selected book
editSelectedBook.ItemTitle = selectedItem.Title;
editSelectedBook.ItemPublisher = selectedItem.Publisher;
editSelectedBook.ItemCopyrightYear = selectedItem.CopyrightYear.ToString();
editSelectedBook.ItemLoanPeriod = selectedItem.LoanPeriod.ToString();
editSelectedBook.ItemCallNumber = selectedItem.CallNumber;
editSelectedBook.BookAuthor = selectedItem.Author;
int.TryParse(editSelectedBook.ItemCopyrightYear, out bookCopyrightYear);
int.TryParse(editSelectedBook.ItemLoanPeriod, out bookLoanPeriod);
result = editSelectedBook.ShowDialog(); // show form as dialog for selected book
_lib._items.RemoveAt(editBookForm.ItemIndex); // the book being edited is removed
LibraryBook editedBook = new LibraryBook(editSelectedBook.ItemTitle, editSelectedBook.ItemPublisher, bookCopyrightYear, bookLoanPeriod, editSelectedBook.ItemCallNumber, editSelectedBook.BookAuthor);
_lib._items.Insert(editBookForm.ItemIndex, editedBook); // the edited version of the book is added
}
catch (InvalidCastException)
{
MessageBox.Show("Select a Book Item!"); // error if selected item is not a book
}
catch (ArgumentOutOfRangeException)
{
MessageBox.Show("Select a Book!"); // error if no book selected
}
}
editBookForm.Dispose(); // Good .NET practice - will get garbage collected anyway
}
//Preconditions: user clicks edit then clicks book. user must select an item from the combo box
//Postconditions: dialog box shows up with the books current information loaded into it. user can then change the info
private void bookToolStripMenuItem1_Click(object sender, EventArgs e)
{
List <LibraryItem> items = lib.GetItemsList(); //reference library items
List <LibraryItem> bookList = new List <LibraryItem>(); //create new list of only library books
List <int> bookIndecies = new List <int>(); //creates index of which book is stored in the index in the items list
for (int i = 0; i < items.Count; ++i)
{
if (items[i] is LibraryBook)
{
bookList.Add(items[i]);
bookIndecies.Add(i);
}
}
if ((bookList.Count() == 0))
{
MessageBox.Show("Must have books in the book list");
}
else
{
EditBookForm editBookForm = new EditBookForm(bookList);
DialogResult result1 = editBookForm.ShowDialog();
if (result1 == DialogResult.OK)
{
int itemIndex; //to hold index
itemIndex = bookIndecies[editBookForm.ItemIndex];
BookForm bookForm = new BookForm();
LibraryBook books = (LibraryBook)items[itemIndex]; //downcast
bookForm.ItemTitle = items[itemIndex].Title;
bookForm.ItemPublisher = items[itemIndex].Publisher;
bookForm.ItemCopyrightYear = items[itemIndex].CopyrightYear.ToString();
bookForm.ItemLoanPeriod = items[itemIndex].LoanPeriod.ToString();
bookForm.ItemCallNumber = items[itemIndex].CallNumber;
bookForm.BookAuthor = books.Author; //from downcast
DialogResult result2 = bookForm.ShowDialog();
if (result2 == DialogResult.OK)
{
items[itemIndex].Title = bookForm.ItemTitle;
items[itemIndex].Publisher = bookForm.ItemPublisher;
items[itemIndex].CopyrightYear = int.Parse(bookForm.ItemCopyrightYear);
items[itemIndex].LoanPeriod = int.Parse(bookForm.ItemLoanPeriod);
items[itemIndex].CallNumber = bookForm.ItemCallNumber;
books.Author = bookForm.BookAuthor; //from downcast
}
}
}
}
// Precondition: User clicks on the edit book control
// Postcondition: Edited book is saved to the library.
private void bookToolStripMenuItem1_Click(object sender, EventArgs e)
{
List <LibraryBook> books = new List <LibraryBook>(); // List of books
// Walk through items to find books
for (int i = 0; i < _lib.GetItemsList().Count(); i++)
{
//Is the item a book?
if (_lib.GetItemsList().ElementAt(i) is LibraryBook)
{
// Cast and add to list
books.Add((LibraryBook)_lib.GetItemsList().ElementAt(i));
}
}
EditBookForm editBook = new EditBookForm(books); // Create edit book form
DialogResult result = editBook.ShowDialog(); // Show form as dialog and store result
if (result == DialogResult.OK)
{
LibraryItem selectedBook = _lib.GetItemsList().ElementAt(editBook.BookIndex); // the book to be updated
// walk thru library items list
foreach (LibraryItem i in _lib.GetItemsList())
{
// condition to find the selected book
if (i == selectedBook)
{
LibraryItem oldbook = _lib.GetItemsList().ElementAt(_lib._items.IndexOf(selectedBook)); // Old book
LibraryBook newi = (LibraryBook)i; // New book
newi.Title = editBook.ItemTitle; // set new book title
newi.Publisher = editBook.ItemPublisher; // set new book publisher
newi.CopyrightYear = int.Parse(editBook.ItemCopyrightYear); // set new book copyright year
newi.LoanPeriod = int.Parse(editBook.ItemLoanPeriod); // set new book loan period
newi.CallNumber = editBook.ItemCallNumber; // set new book call number
newi.Author = editBook.Author.ToString(); // set new book author
// Puts the book into item format
LibraryItem castednewi = (LibraryItem)newi;
// Updates the book
oldbook = newi;
}
}
}
}