protected void LinkButtonCreateOrEdit_Click(object sender, EventArgs e)
{
Book book;
int bookId= 0;
BookLibraryEntities db = new BookLibraryEntities();
if (!String.IsNullOrEmpty(this.LabelBookId.Text))
{
bookId = Convert.ToInt32(this.LabelBookId.Text);
book = db.Books.FirstOrDefault(c => c.Id == bookId);
}
else
{
book = new Book();
db.Books.Add(book);
}
try
{
if(String.IsNullOrEmpty(this.TextBoxTitle.Text))
{
throw new ArgumentException("Title must be filled!");
}
if (String.IsNullOrEmpty(this.TextBoxAuthors.Text))
{
throw new ArgumentException("Author must be filled!");
}
book.Title = this.TextBoxTitle.Text;
book.Author = this.TextBoxAuthors.Text;
book.ISBN = this.TextBoxISBN.Text;
book.Website = this.TextBoxWebsite.Text;
book.Description = this.TextBoxDescription.Text;
book.CategoryId = Convert.ToInt32(this.DropDownListCategories.SelectedItem.Value);
db.SaveChanges();
ErrorSuccessNotifier.AddInfoMessage("Book successfully " + (bookId == 0 ? "created!" : "edited!"));
ErrorSuccessNotifier.ShowAfterRedirect = true;
Response.Redirect("EditBooks.aspx", false);
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex);
}
}
protected void saveNewBookButton_Click(object sender, EventArgs e)
{
try
{
var title = this.newTitleBox.Text;
var author = this.newAuthorBox.Text;
if (string.IsNullOrWhiteSpace(title) || string.IsNullOrWhiteSpace(author))
{
throw new ArgumentNullException(
"The title or the author of a book could not be null or white space");
}
var isbn = this.newISBNBox.Text;
var website = this.newWebSiteBox.Text;
var pattern = @"^(https?|ftp|file)://.+$";
if (!Regex.IsMatch(website, pattern))
{
throw new ArgumentOutOfRangeException(
"The book web site url is not valid");
}
var description = this.newDescriptionBox.Text;
var categoryId = Convert.ToInt32(Session["categoryId"]);
Session["categoryId"] = null;
LibrarySystemEntities context = new LibrarySystemEntities();
Book book = new Book()
{
Title = title,
Author = author,
ISBN = isbn,
WebSite = website,
Discription = description
};
Category category = context.Categories.Find(categoryId);
category.Books.Add(book);
context.SaveChanges();
this.booksGrid.PageIndex = 0;
this.newBookPanel.Visible = false;
this.newBookButton.Visible = true;
ErrorSuccessNotifier.AddSuccessMessage("Book was successfully added.");
}
catch (Exception ex)
{
ErrorSuccessNotifier.AddErrorMessage(ex);
}
}