kubsu-sm4-db-lab-win-forms/db_lab/Form1.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 Npgsql;

namespace db_lab
{
    public partial class Form1 : Form
    {
        string connectionString = "Server=localhost;Port=5432;UserId=postgres;Password=postgres;Database=SQL_Servers;";
        NpgsqlConnection connection;

        public Form1()
        {
            InitializeComponent();
        }

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

        private void aboutBtn_Click(object sender, EventArgs e)
        {
            string appName = Application.ProductName;
            string appVersion = Application.ProductVersion;
            string developer = "Артем Вебер";

            string message = $"Приложение: {appName}\nВерсия: {appVersion}\nРазработчик: {developer}";
            MessageBox.Show(message, "Информация о приложении", MessageBoxButtons.OK, MessageBoxIcon.Information);
        }

        private void raportBtn_Click(object sender, EventArgs e)
        {
            RaportForm raportForm = new RaportForm();
            raportForm.Show();
        }

        private void dataBtn_Click(object sender, EventArgs e)
        {
            DataForm dataForm = new DataForm();
            dataForm.Show();
        }

        private void guideBtn_Click(object sender, EventArgs e)
        {
            GuideForm guideForm = new GuideForm();
            guideForm.Show();
        }

        private void dbConnectBtn_Click(object sender, EventArgs e)
        {
            try
            {
                this.connection = new NpgsqlConnection(this.connectionString);
                this.connection.Open();
                MessageBox.Show("Database was successfuly connected!");
            } catch (Exception ex)
            {
                MessageBox.Show($"Error! Db connection was fatal! Log: {ex.Message}");
            }
        }
    }
}