using MySql.Data.MySqlClient; 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 NeshinaPolina2111 { public partial class Authorization : Form { public Authorization() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { string login = tbLogin.Text.Trim(); string password = tbPassword.Text.Trim(); if (string.IsNullOrWhiteSpace(login) || string.IsNullOrWhiteSpace(password)) { MessageBox.Show("Введите логин и пароль.", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Warning); return; } var db = DB.GetInstance(); var conn = db.GetConnection(); try { string query = "SELECT idAuthorization, idRole FROM Authorization WHERE Login = @login AND Password = @password"; using (var cmd = new MySqlCommand(query, conn)) { cmd.Parameters.AddWithValue("@login", login); cmd.Parameters.AddWithValue("@password", password); int authId = 0; int roleId = 0; using (var reader = cmd.ExecuteReader()) { if (reader.Read()) { authId = Convert.ToInt32(reader["idAuthorization"]); roleId = Convert.ToInt32(reader["idRole"]); } else { MessageBox.Show("Неверный логин или пароль.", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Warning); return; } } MainForm mainForm = new MainForm(roleId, authId, this); this.Hide(); mainForm.ShowDialog(); this.Show(); tbLogin.Clear(); tbPassword.Clear(); } } catch (Exception ex) { MessageBox.Show($"Ошибка при входе: {ex.Message}", "Ошибка", MessageBoxButtons.OK, MessageBoxIcon.Error); } } } }