private void drinkDeleteBtn_Click(object sender, EventArgs e) { if (boxId.Text == "") { // show a message if a user did not enter a value MessageBox.Show("Please enter a value for ID before clicking on Delete", "", MessageBoxButtons.OK, MessageBoxIcon.Information); } else { if (MessageBox.Show("Are you sure that you want to remove this drink?", "Warning" , MessageBoxButtons.YesNo, MessageBoxIcon.Exclamation) == DialogResult.Yes) { // reading data from the textboxes int id = int.Parse(boxId.Text); // passing data to the UI layer SomerenUI.deleteBarServiceUI(id); // show a messagebox after clicking on update button MessageBox.Show("You have successfully deleted a drink!!\n " + "Enter Refresh the list to see the changes", "", MessageBoxButtons.OK, MessageBoxIcon.Information); } } // clearing data from textboxes drinkAmountBox.Clear(); drinkNameBox.Clear(); drinkPriceBox.Clear(); boxId.Clear(); }