private void button3_Click(object sender, EventArgs e) { if (numericUpDown1.Value > 0 && !string.IsNullOrWhiteSpace(comboBox1.Text) && !string.IsNullOrWhiteSpace(comboBox2.Text)) { int result = controllerObj.AddItemToShipment(id, Convert.ToInt32(comboBox2.Text), Convert.ToInt32(numericUpDown1.Value)); if (result <= 0) { MessageBox.Show("Item additon failed,Item may already exist"); } else { MessageBox.Show("Item added to order"); double Price = Convert.ToDouble(controllerObj.GetProductPrice(comboBox2.Text)); Price *= Convert.ToInt32(numericUpDown1.Value); controllerObj.UpdateShipmentPrice(Price.ToString(), id.ToString()); } } else { MessageBox.Show("Enter Correct values for quantity"); return; } }