public RetrieveBooks RetrieveAll()
{
RetrieveBooks books = new RetrieveBooks();
GetDBConnection();
conn.Open();
DataSet ds = new DataSet();
SqlDataAdapter da = new SqlDataAdapter("Select * from BookInfo", conn);
da.Fill(ds);
books.BookSet = ds;
conn.Close();
return(books);
}
public RetrieveBooks RetrieveByAuthor(string author)
{
RetrieveBooks books = new RetrieveBooks();
GetDBConnection();
conn.Open();
string cmdTxt = "SELECT * FROM BookInfo WHERE AuthorList LIKE @author";
SqlCommand cmd = new SqlCommand(cmdTxt, conn);
cmd.Parameters.AddWithValue("@author", "%" + author + "%");
DataSet bookDataSet = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(bookDataSet);
books.BookSet = bookDataSet;
conn.Close();
return(books);
}
public RetrieveBooks RetrieveByPrice(float price)
{
RetrieveBooks books = new RetrieveBooks();
GetDBConnection();
conn.Open();
string cmdTxt = "SELECT * FROM BookInfo WHERE Price > @price";
SqlCommand cmd = new SqlCommand(cmdTxt, conn);
cmd.Parameters.AddWithValue("@price", price);
DataSet bookDataSet = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(bookDataSet);
books.BookSet = bookDataSet;
conn.Close();
return(books);
}
public RetrieveBooks RetrieveByDate(string date)
{
RetrieveBooks books = new RetrieveBooks();
GetDBConnection();
conn.Open();
string formattedDate = DateTime.Parse(date).ToString("yyyy-dd-MM");
string cmdTxt = "SELECT * FROM BookInfo WHERE PublishingDate > @date";
SqlCommand cmd = new SqlCommand(cmdTxt, conn);
cmd.Parameters.AddWithValue("@date", formattedDate);
DataSet bookDataSet = new DataSet();
SqlDataAdapter da = new SqlDataAdapter(cmd);
da.Fill(bookDataSet);
books.BookSet = bookDataSet;
conn.Close();
return(books);
}