GtaVUsersInfo/Forms/AddCars.cs

using GtaVUsersInfo.Helpers;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace GtaVUsersInfo.Forms
{
    public partial class AddCars : Form
    {
        List<Car> carList;
        Car carItem;

        public AddCars(List<Car> carPrice, Car carItem)
        {
            InitializeComponent();

            carList = carPrice;

            this.carItem = carItem;

            foreach (Car car in carList)
            {
                carComboBox.Items.Add(car.Name);
            }
        }

        private void carComboBox_SelectedIndexChanged(object sender, EventArgs e)
        {
            if ((sender as ComboBox).SelectedIndex == -1)
                return;

            carPrice.Text = "$" + carList[(sender as ComboBox).SelectedIndex].Price.ToString();
        }

        private void carPrice_Enter(object sender, EventArgs e)
        {
            (sender as TextBox).Text = (sender as TextBox).Text.Trim('$');
        }

        private void carPrice_Leave(object sender, EventArgs e)
        {
            (sender as TextBox).Text = '$' + (sender as TextBox).Text;
        }

        private void carPrice_KeyPress(object sender, KeyPressEventArgs e)
        {
            if (e.KeyChar == (char)Keys.Enter)
            {
                saveItem.Focus();
                e.Handled = true;
                return;
            }

            if (!char.IsControl(e.KeyChar) && !char.IsDigit(e.KeyChar))
            {
                e.Handled = true;
            }
        }

        private void saveItem_Click(object sender, EventArgs e)
        {
            try
            {
                if (carComboBox.SelectedIndex == -1)
                {
                    ErrorsShow.ShowErrorMessage("Не выбран ни один автомобиль");
                    return;
                }

                Car selectedCar = carList[carComboBox.SelectedIndex];

                carItem.Name = selectedCar.Name;
                carItem.Price = int.Parse(carPrice.Text.Trim('$'));
                carItem.Photo = selectedCar.Photo;
                carItem.Manufacturer = selectedCar.Manufacturer;
                carItem.Class = selectedCar.Class;
                carItem.Model = selectedCar.Model;

                this.Close();
            }
            catch (Exception ex)
            {
                ErrorsShow.ShowErrorMessage($"Произошла неожиданная ошибка: {ex.Message}");
                return;
            }
        }
    }
}