private void btnAdd_Click(object sender, EventArgs e)
{
string bookName = txtBookName.Text;
string bookGenre = txtBookGenre.Text;
string bookPrice = txtPrice.Text;
//string bookAuthor = txtAuthorName.Text;
string bookDescript = txtBookDascript.Text;
// secilmish qrupun ID nomresinin groupID-ye verilmesi
string authorId = ((BookComboBox)cmbAuthor.SelectedItem).Value;
// Author tipinden deyishen yaradiriq
// ve author siyahisinin ID-lerinden secilmishini deyishene veririk
Author selectedAuthor = AuthorList.GetAuthorByID(authorId);
if (selectedAuthor == null) // eger secilmish author yoxdursa
{
MessageBox.Show("Author doesn't exist");
return;
}
if (string.IsNullOrEmpty(bookName))
{
// ERROR mesajinin verilmersi
MessageBox.Show("Book name is not valid", "Failed!",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (string.IsNullOrEmpty(bookGenre))
{
// ERROR mesajinin verilmersi
MessageBox.Show("Book genre is not valid", "Failed!",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (string.IsNullOrEmpty(bookDescript))
{
// ERROR mesajinin verilmersi
MessageBox.Show("Book description is not valid", "Failed!",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
if (string.IsNullOrEmpty(bookPrice))
{
// ERROR mesajinin verilmersi
MessageBox.Show("Book price is not valid", "Failed!",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
// eger AuthorListde bu ad varsa
if (BookList.ContainsBookName(bookName))
{
// ERROR mesaji verilir
MessageBox.Show("Book name is duplicate", "Failed!",
MessageBoxButtons.OK, MessageBoxIcon.Error);
return;
}
BookList.AddBook(new Book {
BookName = bookName,
BookJenre = bookGenre,
Price = bookPrice,
Description = bookDescript,
Authors = selectedAuthor,
});
txtBookName.Text = "";
txtBookGenre.Text = "";
txtBookDascript.Text = "";
txtPrice.Text = "";
}