private async void btnBookSearch_Click(object sender, EventArgs e)
{
BookSearchForm bookSearchForm = new BookSearchForm();
DialogResult result = bookSearchForm.ShowDialog(this);
if (result == DialogResult.Cancel)
{
return;
}
SearchedBooks.Clear();
SearchedBooks = await SearchBooks(bookSearchForm);
bindingSourceBookSearch.DataSource = SearchedBooks;
dataGridViewBooks.DataSource = bindingSourceBookSearch;
}
private Task <List <Book> > SearchBooks(BookSearchForm bookSearchForm)
{
return(Task.Run(() => {
List <Book> searchResult = new List <Book>();
IQueryable <Book> bookIQuer = _db.Books;
if (!string.IsNullOrWhiteSpace(bookSearchForm.textBoxSearchTitle.Text))
{
bookIQuer = bookIQuer.Where(p => p.Title.Contains(bookSearchForm.textBoxSearchTitle.Text));
}
if (!string.IsNullOrWhiteSpace(bookSearchForm.textBoxSearchAuthor.Text))
{
bookIQuer = bookIQuer.Where(p => p.Author.FirstName.Contains(bookSearchForm.textBoxSearchAuthor.Text) ||
p.Author.SecondName.Contains(bookSearchForm.textBoxSearchAuthor.Text));
}
int year = 0;
if (!string.IsNullOrWhiteSpace(bookSearchForm.textBoxSearchPublishing.Text) &&
int.TryParse(bookSearchForm.textBoxSearchPublishing.Text, out year))
{
bookIQuer = bookIQuer.Where(p => p.PublishingDate == year);
}
if (bookSearchForm.checkedListBoxSearchGenre.CheckedItems.Count > 0)
{
foreach (var item in bookSearchForm.checkedListBoxSearchGenre.CheckedItems)
{
BookGenre genre = (BookGenre)Enum.Parse(typeof(BookGenre), item.ToString());
searchResult.AddRange(bookIQuer.Where(p => p.Genre == genre).ToList <Book>());
}
}
else
{
searchResult.AddRange(bookIQuer.ToList <Book>());
}
return searchResult;
}));
}