demMalyhin_Merkulov/AdmAddOrder.cs

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;
using System.Windows.Forms.VisualStyles;
using MySql.Data.MySqlClient;

namespace demMalyhin
{
    public partial class AdmAddOrder : Form
    {
        public AdmAddOrder()
        {
            InitializeComponent();
            LoadPickup();
            LoadUser();
        }

        private void LoadPickup()
        {
            try
            {
                DB db = new DB();
                using (MySqlConnection connection = db.getConnection())
                {
                    connection.Open();
                    string query = "SELECT idpickup_points, pickup_points.index FROM pickup_points";
                    using (MySqlCommand command = new MySqlCommand(query, connection))
                    {
                        using (MySqlDataReader reader = command.ExecuteReader())
                        {
                            DataTable categoryTable = new DataTable();
                            categoryTable.Load(reader);

                            comboBoxPoint.DataSource = categoryTable;
                            comboBoxPoint.DisplayMember = "index";
                            comboBoxPoint.ValueMember = "idpickup_points";
                        }
                    }
                }
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("Ошибка при загрузке категорий: " + ex.Message);
            }
        }

        private void LoadUser()
        {
            try
            {
                DB db = new DB();
                using (MySqlConnection connection = db.getConnection())
                {
                    connection.Open();
                    string query = "SELECT id_users FROM users";
                    using (MySqlCommand command = new MySqlCommand(query, connection))
                    {
                        using (MySqlDataReader reader = command.ExecuteReader())
                        {
                            DataTable userTable = new DataTable();
                            userTable.Load(reader);

                            comboBoxUser.DataSource = userTable;
                            comboBoxUser.DisplayMember = "id_users";
                            comboBoxUser.ValueMember = "id_users";
                        }
                    }
                }
            }
            catch (MySqlException ex)
            {
                MessageBox.Show("Ошибка при загрузке категорий: " + ex.Message);
            }
        }

        private async void btnAdd_Click(object sender, EventArgs e)
        {
            if (string.IsNullOrEmpty(textBoxDate.Text) || string.IsNullOrEmpty(textBoxDelivery.Text) || string.IsNullOrEmpty(textBoxCode.Text))
            {
                MessageBox.Show("Заполните все обязательные поля!");
                return;
            }



            DB db = new DB();

            try
            {
                db.openConnection();

                string query = "INSERT INTO Orders (order_date, delivery_date, pickup_point_id, user_initials_id, Orders.code, orderstatus_id)" +
                   "VALUES (@od, @dd, @pp, (SELECT id_users FROM users WHERE id_users = @user), @code, 1)";

                using (MySqlCommand command = new MySqlCommand(query, db.getConnection()))
                {
                    command.Parameters.AddWithValue("@od", textBoxDate.Text);
                    command.Parameters.AddWithValue("@pp", comboBoxPoint.SelectedValue.ToString());
                    command.Parameters.AddWithValue("@user", comboBoxUser.SelectedValue.ToString());
                    command.Parameters.AddWithValue("@dd", textBoxDelivery.Text);
                    command.Parameters.AddWithValue("@code", textBoxCode.Text);

                    

                    int rowsAffected = await command.ExecuteNonQueryAsync();

                    if (rowsAffected > 0)
                    {
                        MessageBox.Show("Заказ успешно добавлен!");
                        DialogResult = DialogResult.OK;
                        this.Close();
                        AdmOrder ado = new AdmOrder();
                        ado.Show();
                    }
                    else
                    {
                        MessageBox.Show("Ошибка при добавлении заказа.");
                    }
                }
            }
            catch (MySqlException ex)
            {
                if (ex.Number == 1452)
                {
                    MessageBox.Show("Указанная категория не существует. Введите допустимое название категории.");
                }
                else
                {
                    MessageBox.Show("Ошибка базы данных: " + ex.Message);
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show("Произошла: " + ex.Message);
            }
            finally
            {
                db.closeConnection();
            }
        }

        private void btnBack_Click(object sender, EventArgs e)
        {
            this.Hide();
            AdmOrder ador = new AdmOrder();
            ador.Show();
        }

        private void btnExit_Click(object sender, EventArgs e)
        {
            Application.Exit();
        }
    }
}