public void UpdateStock(DTO_Class.StockDTO stockDTO)
        {
            sqlConnection.Open();

            /*     string sqlQuery = "Update Owner SET OwnerID='" + ownerDTO.OwnerID + "' where OwnerID='" + ownerDTO.OwnerID + "'";
             *
             *   sqlCommand = new SqlCommand(sqlQuery, sqlConnection);
             *   sqlCommand.ExecuteNonQuery();
             *
             */

            string sqlQuery1 = "Update Stock SET MedicineName='" + stockDTO.MedicineNAME + "' where MedicineID='" + stockDTO.MedicineID + "'";

            sqlCommand1 = new SqlCommand(sqlQuery1, sqlConnection);
            sqlCommand1.ExecuteNonQuery();

            string sqlQuery2 = "Update Stock SET Price='" + stockDTO.PRICE + "' where MedicineID='" + stockDTO.MedicineID + "'";

            sqlCommand2 = new SqlCommand(sqlQuery2, sqlConnection);
            sqlCommand2.ExecuteNonQuery();


            string sqlQuery3 = "Update Stock SET Quantity='" + stockDTO.QUANTITY + "' where MedicineID='" + stockDTO.MedicineID + "'";

            sqlCommand3 = new SqlCommand(sqlQuery3, sqlConnection);
            sqlCommand3.ExecuteNonQuery();

            string sqlQuery4 = "Update Stock SET MedicineType='" + stockDTO.MedicineTYPE + "' where MedicineID='" + stockDTO.MedicineID + "'";

            sqlCommand4 = new SqlCommand(sqlQuery4, sqlConnection);
            sqlCommand4.ExecuteNonQuery();


            sqlConnection.Close();
        }
        public void CreateStock(DTO_Class.StockDTO stockDTO)
        {
            try
            {
                sqlConnection.Open();
                string sqlQuery = " insert into Stock values('" + stockDTO.MedicineID +
                                  "','" + stockDTO.MedicineNAME +
                                  "','" + stockDTO.PRICE +
                                  "','" + stockDTO.QUANTITY +
                                  "','" + stockDTO.MedicineTYPE +
                                  "')";

                sqlCommand = new SqlCommand(sqlQuery, sqlConnection);
                sqlCommand.ExecuteNonQuery();

                sqlConnection.Close();
            }
            catch (Exception ex)
            {
                MessageBox.Show("Invalid Input!", "alert", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }