public static DataTable get_theloai() { return(DBConnect.GetData("get_theloai")); }
public static DataTable get_nhaxuatban() { return(DBConnect.GetData("get_nhaxuatban")); }
public static DataTable get_cuonsach() { return(DBConnect.GetData("get_cuonsach")); }
public static DataTable get_tacgia() { return(DBConnect.GetData("get_tacgia")); }
public DAL_YC1() { db = new DBConnect(); }
public DAL_TiecCuoi() { db = new DBConnect(); }
public DAL_SANH() { db = new DBConnect(); }