private void txtBoxConnectionString_TextChanged(object sender, EventArgs e)
        {
            if (!string.IsNullOrEmpty(txtBoxConnectionString.Text))
            {
                btnSaveConnectionStringToFile.Enabled = true;
                _connectionString = CaesarEncoder.Encrypt(txtBoxConnectionString.Text, true);

                var connectionSuccessfully = new Repository(_connectionString).CheckConnection();
                if (connectionSuccessfully)
                {
                    lblConnectionStatus.Text      = "Подключение к БД успешно установлено";
                    lblConnectionStatus.ForeColor = Color.ForestGreen;

                    foreach (var tabPage in tabPane.TabPages)
                    {
                        ((TabPage)tabPage).Enabled = true;
                    }
                }
                else
                {
                    lblConnectionStatus.Text      = "Подключение к БД отсутствует";
                    lblConnectionStatus.ForeColor = Color.Red;

                    foreach (var tabPage in tabPane.TabPages)
                    {
                        if (((TabPage)tabPage).Text != "Настройки")
                        {
                            ((TabPage)tabPage).Enabled = false;
                        }
                    }
                }
            }
        }
        private void btnGenerateConnectionString_Click(object sender, EventArgs e)
        {
            var connectionString = GetConnectionString(string.Empty);

            if (connectionString != null)
            {
                txtBoxConnectionString.Text = CaesarEncoder.Encrypt(connectionString);
            }
        }
        private void btnLoadSettingsFromFile_Click(object sender, EventArgs e)
        {
            var explorer = new OpenFileDialog();

            if (explorer.ShowDialog() == DialogResult.OK)
            {
                var textFromFile = File.ReadAllText(explorer.FileName);

                txtBoxConnectionString.Text = textFromFile;

                _connectionString = CaesarEncoder.Encrypt(textFromFile, true);
            }
        }