Файл Form6.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 System;

using System.Drawing;

using System.IO;

using System.Windows.Forms;

using iTextSharp.text;

using iTextSharp.text.pdf;

using System.Drawing.Printing;

using System.Drawing;

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

using static System.Runtime.InteropServices.JavaScript.JSType;

using System.Reflection.Metadata;

namespace hikingtrips

{

public partial class Form6 : Form

{

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

string y;

public class PurchaseData

{

public DateTime PurchaseDate { get; set; }

public int TotalAmount { get; set; }

}

public Form6(string userontrip)

{

InitializeComponent();

this.y = userontrip;

}

private void button1_Click(object sender, EventArgs e)

{

string feedback = textBox1.Text;

SaveFeedback(feedback);

}

private void SaveFeedback(string feedback)

{

using (MySqlConnection connection = new MySqlConnection(connectionString))

{

connection.Open();

string query = "INSERT INTO review (user, text) VALUES (@user, @text)";

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

{

command.Parameters.AddWithValue("@user", y);

command.Parameters.AddWithValue("@text", feedback);

command.ExecuteNonQuery();

}

}

}

}

}

ПРИЛОЖЕНИЕ 2.

Листинг программ. Интерфейс для инструктора hikingtripsinstructors. Файл Form1.Cs

using MySql.Data.MySqlClient;

using System;

using System.Security.Policy;

using System.Windows.Forms;

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

namespace hikingtripsforinstructors

{

public partial class Form1 : Form

{

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

public Form1()

{

InitializeComponent();

}

private void button1_Click(object sender, EventArgs e)

{

string username = textBox1.Text;

string password = textBox2.Text;

AuthenticateInstructor(username, password);

}

private void AuthenticateInstructor(string username, string password)

{

using (MySqlConnection connection = new MySqlConnection(connectionString))

{

connection.Open();

string checkUserQuery = "SELECT * FROM login_password_instructors WHERE instructor_login = @Username";

using (MySqlCommand checkUserCommand = new MySqlCommand(checkUserQuery, connection))

{

checkUserCommand.Parameters.AddWithValue("@Username", username);

int userCount = Convert.ToInt32(checkUserCommand.ExecuteScalar());

if (userCount > 0)

{

string passwordQuery = "SELECT instructor_password, instructor_login FROM login_password_instructors WHERE instructor_login = @Username";

using (MySqlCommand passwordCommand = new MySqlCommand(passwordQuery, connection))

{

passwordCommand.Parameters.AddWithValue("@Username", username);

MySqlDataReader reader2 = passwordCommand.ExecuteReader();

if (reader2.Read())

{

string storedPassword = reader2["instructor_password"].ToString();

if (storedPassword == password)

{

MessageBox.Show("The login was completed successfully!", "Congratulations!", MessageBoxButtons.OK, MessageBoxIcon.Information);

Form2 frm2 = new Form2();

frm2.Show();

}

else

{

MessageBox.Show("The password is incorrect.", "Sorry.", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

reader2.Close();

}

}

}

else

{

MessageBox.Show("The instructor with this username was not found.", "Sorry.", MessageBoxButtons.OK, MessageBoxIcon.Information);

}

}

}

}

}

}