public bool Insert(LocationNotAvail c)
        {
            bool isSuccess = false;

            SqlConnection Con = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\TimeTableDatabase.mdf;Integrated Security=True");

            try
            {
                string     sql = "INSERT INTO Location_not_Avaible(lecid,day,room,dur,stime,etime)VALUES(@lecid,@day,@room,@dur,@stime,@etime)";
                SqlCommand cmd = new SqlCommand(sql, Con);



                cmd.Parameters.AddWithValue("@lecid", c.lecid);
                cmd.Parameters.AddWithValue("@day", c.day);
                cmd.Parameters.AddWithValue("@room", c.room);
                cmd.Parameters.AddWithValue("@dur", c.dur);
                cmd.Parameters.AddWithValue("@stime", c.stime);
                cmd.Parameters.AddWithValue("@etime", c.etime);


                Con.Open();

                int rows = cmd.ExecuteNonQuery();
                if (rows > 0)
                {
                    isSuccess = true;
                }

                else
                {
                    isSuccess = false;
                }
            }
            catch (Exception ex)
            {
            }

            finally
            {
                Con.Close();
            }
            return(isSuccess);
        }
        public bool Delete(LocationNotAvail c)
        {
            bool          isSuccess = false;
            SqlConnection Con       = new SqlConnection(@"Data Source=(LocalDB)\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\TimeTableDatabase.mdf;Integrated Security=True");



            try
            {
                string     sql = "DELETE FROM Location_not_Avaible WHERE lid=@lid";
                SqlCommand cmd = new SqlCommand(sql, Con);
                cmd.Parameters.AddWithValue("@lid", c.lid);



                Con.Open();
                int rows = cmd.ExecuteNonQuery();
                if (rows > 0)
                {
                    isSuccess = true;
                }

                else
                {
                    isSuccess = false;
                }
            }
            catch (Exception ex)
            {
            }

            finally
            {
                Con.Close();
            }
            return(isSuccess);
        }