Файл Form4.Cs

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;

using static System.Windows.Forms.VisualStyles.VisualStyleElement.StartPanel;

namespace hikingtrips

{

public partial class Form4 : Form

{

private const string connectionString = "server=localhost;database=hikingtrips;uid=root;password=Fuckingpassword2;";

public Form4()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

string last_name = textBox1.Text;

string first_name = textBox2.Text;

string middle_name = textBox3.Text;

string phone_number = textBox4.Text;

string email = textBox5.Text;

string date_of_birth = textBox6.Text;

AddUserData(last_name, first_name, middle_name, phone_number, email, date_of_birth);

}

private void AddUserData(string last_name, string first_name, string middle_name, string phone_number, string email, string date_of_birth)

{

using (MySqlConnection connection = new MySqlConnection(connectionString))

{

connection.Open();

string registerUserQuery = "INSERT INTO costumers (last_name, first_name, middle_name, phone_number, email, date_of_birth) VALUES (@last_name, @first_name, @middle_name, @phone_number, @email, @date_of_birth)";

using (MySqlCommand registerUserCommand = new MySqlCommand(registerUserQuery, connection))

{

registerUserCommand.Parameters.AddWithValue("@last_name", last_name);

registerUserCommand.Parameters.AddWithValue("@first_name", first_name);

registerUserCommand.Parameters.AddWithValue("@middle_name", middle_name);

registerUserCommand.Parameters.AddWithValue("@phone_number", phone_number);

registerUserCommand.Parameters.AddWithValue("@email", email);

registerUserCommand.Parameters.AddWithValue("@date_of_birth", date_of_birth);

registerUserCommand.ExecuteNonQuery();

MessageBox.Show("User data has been successfully added!", "Congratulations!", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

}

Form3 frm3 = new Form3();

frm3.Show();

this.Hide();

}

}

}

Файл Form3.Cs

using iTextSharp.text;

using iTextSharp.text.pdf;

using Microsoft.VisualBasic.Logging;

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;

using static System.Windows.Forms.VisualStyles.VisualStyleElement;

using static System.Windows.Forms.VisualStyles.VisualStyleElement.StartPanel;

namespace hikingtrips

{

public partial class Form3 : Form

{

private const string connectionString = "server=localhost;database=hikingtrips;uid=root;password=Fuckingpassword2;";

public Form3()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

string username = textBox1.Text;

string password = textBox2.Text;

int userId = GetLastInsertedUserId();

if (userId != -1)

{

RegistrateUser(username, password, userId);

}

else

{

MessageBox.Show("Error getting the user ID.", "Error.", MessageBoxButtons.OK, MessageBoxIcon.Error);

}

}

private int GetLastInsertedUserId()

{

int lastUserId = -1;

using (MySqlConnection connection = new MySqlConnection(connectionString))

{

connection.Open();

string query = "SELECT LAST_INSERT_ID()";

using (MySqlCommand command = new MySqlCommand(query, connection))

{

lastUserId = Convert.ToInt32(command.ExecuteScalar());

}

}

return lastUserId;

}

private void RegistrateUser(string login, string password, int userId)

{

using (MySqlConnection connection = new MySqlConnection(connectionString))

{

connection.Open();

string query = "INSERT INTO login_password (login, password, user) VALUES (@Login, @Password, @User)";

using (MySqlCommand command = new MySqlCommand(query, connection))

{

command.Parameters.AddWithValue("@Login", login);

command.Parameters.AddWithValue("@Password", password);

command.Parameters.AddWithValue("@User", userId);

command.ExecuteNonQuery();

}

connection.Close();

}

MessageBox.Show("The username and password were added successfully.", "Congratulations!", MessageBoxButtons.OK, MessageBoxIcon.Information);

Form1 frm3 = new Form1();

frm3.Show();

this.Close();

}

}

}