//Submit button clicked
        //Holds majority of logic
        private void btnSubmit_Click(object sender, EventArgs e)
        {
            if (radEnterNew.Checked == false && radSearch.Checked == false)
            {
                MessageBox.Show("Please choose Search or Enter New Customer");
            }
//Enter a new customer option chosen
            if (radEnterNew.Checked)
            {
                //Check if any controls are left blank
                //Program will not contiue if a control is blank
                if (String.IsNullOrEmpty(txtFName.Text))
                {
                    MessageBox.Show("Please enter a first name");
                    return;
                }

                if (String.IsNullOrEmpty(txtLName.Text))
                {
                    MessageBox.Show("Please enter a last name");
                    return;
                }

                //Check for correct number of digits in phone number or if form is blank
                if (txtPhoneNumber.Text.Length > 12 || txtPhoneNumber.Text.Length < 12 ||
                    String.IsNullOrEmpty(txtPhoneNumber.Text))
                {
                    MessageBox.Show("Please enter phone number as XXX-XXX-XXXX");
                    return;
                }

                if (String.IsNullOrEmpty(txtAddress.Text))
                {
                    MessageBox.Show("Please enter an address");
                    return;
                }

                if (String.IsNullOrEmpty(txtCity.Text))
                {
                    MessageBox.Show("Please enter a city");
                    return;
                }

                //Check for two letters in state or form left blank
                if (txtState.Text.Length > 2 || txtState.Text.Length < 2 || String.IsNullOrEmpty(txtState.Text))
                {
                    MessageBox.Show("Please enter only two letters for state");
                    return;
                }

                //Check for correct number of digits in zipcode
                if (txtZipCode.Text.Length > 5 || txtZipCode.Text.Length < 5 || String.IsNullOrEmpty(txtZipCode.Text))
                {
                    MessageBox.Show("Please enter a valid zipcode");
                    return;
                }

//Check if car options selected
                if (cmbAmenities.SelectedIndex == -1)
                {
                    MessageBox.Show("Please choose an amenity");
                    return;
                }

                if (cmbEngine.SelectedIndex == -1)
                {
                    MessageBox.Show("Please choose an engine type");
                    return;
                }

                if (cmbModel.SelectedIndex == -1)
                {
                    MessageBox.Show("Please choose a model");
                    return;
                }

                if (cmbType.SelectedIndex == -1)
                {
                    MessageBox.Show("Please choose a type");
                    return;
                }

                if (cmbYear.SelectedIndex == -1)
                {
                    MessageBox.Show("Please choose a year");
                    return;
                }

//Total price based on options chosen
                if (cmbAmenities.SelectedItem.Equals("Luxury"))
                {
                    totalPrice += price.LUXURY1;
                }

                if (cmbAmenities.SelectedItem.Equals("Standard"))
                {
                    totalPrice += price.STANDARD1;
                }

                if (cmbEngine.SelectedItem.Equals("V6"))
                {
                    totalPrice += price.V61;
                }

                if (cmbEngine.SelectedItem.Equals("V4"))
                {
                    totalPrice += price.V41;
                }

                if (cmbModel.SelectedItem.Equals("Civic"))
                {
                    totalPrice += price.CIVIC1;
                }

                if (cmbModel.SelectedItem.Equals("Accord"))
                {
                    totalPrice += price.ACCORD1;
                }

                if (cmbType.SelectedItem.Equals("Coupe"))
                {
                    totalPrice += price.COUPE1;
                }

                if (cmbType.SelectedItem.Equals("Sedan"))
                {
                    totalPrice += price.SEDAN1;
                }

                //Create new customer object from form inputs
                Customer cust = new Customer(txtFName.Text.ToUpper(), txtLName.Text.ToUpper(),
                                             txtPhoneNumber.Text, GenerateIDNumber(), totalPrice,
                                             txtAddress.Text.ToUpper(), txtCity.Text.ToUpper(),
                                             txtState.Text.ToUpper(),
                                             txtZipCode.Text);

                //Create Honda object based on luxury model selected
                //Couldn't figure out how to set the enum from the combo box choice
                if (cmbAmenities.SelectedItem.Equals("Luxury"))
                {
                    newCar = new Honda(cmbType.Text, Int16.Parse(cmbYear.Text),
                                       Honda.LuxuryorStandard.Luxury, cmbModel.Text,
                                       cmbEngine.Text);
                }

                //Create Honda object based on standard model selected
                if (cmbAmenities.SelectedItem.Equals("Standard"))
                {
                    newCar = new Honda(cmbType.Text, Int16.Parse(cmbYear.Text),
                                       Honda.LuxuryorStandard.Standard, cmbModel.Text,
                                       cmbEngine.Text);
                }



                //Write customer and honda object to file
                try
                {
                    using (StreamWriter writeFile = new StreamWriter(fileName, true))//Write to file; true means append
                    {
                        writeFile.WriteLine(cust.ToString());
                        writeFile.WriteLine(newCar.ToString());
                    }
                }
                catch (System.IO.DirectoryNotFoundException ex)
                {
                    MessageBox.Show(ex.Message);
                }

                //Read file to list box to display to user
                try
                {
                    using (StreamReader stRead = new StreamReader(fileName))
                    {
                        while (!stRead.EndOfStream)
                        {
                            lstbxReceipt.Items.Add(stRead.ReadLine());
                        }
                    }
                }
                catch (System.IO.DirectoryNotFoundException ex)
                {
                    MessageBox.Show(ex.Message);
                }
                totalPrice = 0;
                //clearForm();
            }//End of enter new customer radio button

            if (radSearch.Checked)
            {
                searchFile(txtLName.Text);
            } //End of search radio button
        }     //End of button submit
//Search file for a record based on customer last name
        public void searchFile(string custLastName)
        {
            if (File.Exists(fileName))
            {
                try
                {
                    using (StreamReader inFile = File.OpenText(fileName))
                    {
                        //Read all lines from file into customer and honda objects
                        while (inFile.Peek() > 0)
                        {
                            Customer cust = new Customer();//Create new customer object
                            //Read lines into Customer object
                            cust.FirstName   = inFile.ReadLine();
                            cust.LastName    = inFile.ReadLine();
                            cust.PhoneNumber = inFile.ReadLine();
                            cust.Address     = inFile.ReadLine();
                            cust.City        = inFile.ReadLine();
                            cust.State       = inFile.ReadLine();
                            cust.ZipCode     = inFile.ReadLine();
                            cust.IdNumber    = int.Parse(inFile.ReadLine().Trim());
                            cust.Price       = int.Parse(inFile.ReadLine());

                            customerList.Add(cust);//Add object to array list


                            Honda honda = new Honda(); //Create new Honda object
                                                       //Read lines into Honda object
                            honda.CarManufacturer = inFile.ReadLine();
                            honda.Model           = inFile.ReadLine();
                            honda.EngineType      = inFile.ReadLine();
                            honda.Amenity         = inFile.ReadLine();
                            honda.CarType         = inFile.ReadLine();
                            honda.CarYear         = int.Parse(inFile.ReadLine());

                            hondaList.Add(honda);//Add object to array list
                        }
                        for (int i = 0; i < customerList.Count; i++)
                        {
                            if (customerList[i].LastName.Equals(txtLName.Text.ToUpper()))
                            {
                                index = i;



                                lstbxReceipt.Items.Add(customerList[index].FirstName);
                                lstbxReceipt.Items.Add(customerList[index].LastName);
                                lstbxReceipt.Items.Add(customerList[index].IdNumber);
                                lstbxReceipt.Items.Add(customerList[index].PhoneNumber);
                                lstbxReceipt.Items.Add(customerList[index].Address);
                                lstbxReceipt.Items.Add(customerList[index].City);
                                lstbxReceipt.Items.Add(customerList[index].State);
                                lstbxReceipt.Items.Add(customerList[index].ZipCode);

                                lstbxReceipt.Items.Add(hondaList[index].CarManufacturer);
                                lstbxReceipt.Items.Add(hondaList[index].CarType);
                                lstbxReceipt.Items.Add(hondaList[index].CarYear);
                                lstbxReceipt.Items.Add(hondaList[index].EngineType);
                                lstbxReceipt.Items.Add(hondaList[index].Amenity);
                                break;
                            }
                        }
                    }
                }
                catch (Exception e)
                {
                    MessageBox.Show(e.Message);
                    throw;
                }
            }
            else
            {
                MessageBox.Show("File does not exist");
            }
        }//End of searchFile