PIbd-23_Elatomtsev_L.K._SUBD_Device/DeviceAdmin/FormDevices.cs

using Npgsql;
using System.Data;
namespace DeviceAdmin
{
    public partial class FormDevices : Form
    {
        NpgsqlConnection connection = Program.connection;
        private DataTable dataTable;
        private DataTable dataTableKind = new();
        private NpgsqlDataAdapter adapter;
        private NpgsqlDataAdapter adapter2;
        public FormDevices()
        {
            InitializeComponent();
            LoadGridView();
            adapter2 = new NpgsqlDataAdapter("SELECT * FROM kinds", connection);
            adapter2.Fill(dataTableKind);
            comboBoxKind.DataSource = dataTableKind;
        }
        private void LoadGridView()
        {
            adapter = new NpgsqlDataAdapter("SELECT devices.id, model, kinds.title, serial_number, production_date, warranty_period, condition, kit_id, kits.title FROM devices LEFT JOIN kinds ON devices.kind_id = kinds.id FULL OUTER JOIN kits ON devices.kit_id=kits.id;", connection);
            dataTable = new DataTable();
            adapter.Fill(dataTable);
            dataGridView.DataSource = dataTable;
            DataGridViewColumnCollection columns = dataGridView.Columns;
            columns[0].HeaderText = "ID";
            columns[1].HeaderText = "Модель";
            columns[2].HeaderText = "Вид";
            columns[3].HeaderText = "Сер. номер";
            columns[4].HeaderText = "Дата изг.";
            columns[5].HeaderText = "Гарантия";
            columns[6].HeaderText = "Работает?";
            columns[7].HeaderText = "ID компл.";
            columns[8].HeaderText = "Комплект";
        }
        private void ButtonAdd_Click(object sender, EventArgs e)
        {
            if (checkBoxCondition.Checked == true)
            {
                NpgsqlCommand command = new NpgsqlCommand("INSERT INTO devices VALUES (nextval('seq_devices'), @model, @serial_number, @production_date, @warranty_period, '1', @kind_id, @kit_id);", connection);
                command.Parameters.AddWithValue("@model", textBoxModel.Text);
                command.Parameters.AddWithValue("@kind_id", (int)comboBoxKind.SelectedValue);
                command.Parameters.AddWithValue("@serial_number", textBoxSerialNumber.Text);
                command.Parameters.AddWithValue("@production_date", dateTimePickerProductionDate.Value.Date);
                command.Parameters.AddWithValue("@warranty_period", int.Parse(numericUpDownWarrantyPeriod.Value.ToString()));
                command.Parameters.AddWithValue("@kit_id", int.Parse(numericUpDownKit.Value.ToString()));
                command.ExecuteNonQuery();
            } else
            {
                NpgsqlCommand command = new NpgsqlCommand("INSERT INTO devices VALUES (nextval('seq_devices'), @model, @serial_number, @production_date, @warranty_period, '0', @kind_id, @kit_id);", connection);
                command.Parameters.AddWithValue("@model", textBoxModel.Text);
                command.Parameters.AddWithValue("@kind_id", (int)comboBoxKind.SelectedValue);
                command.Parameters.AddWithValue("@serial_number", textBoxSerialNumber.Text);
                command.Parameters.AddWithValue("@production_date", dateTimePickerProductionDate.Value.Date);
                command.Parameters.AddWithValue("@warranty_period", int.Parse(numericUpDownWarrantyPeriod.Value.ToString()));
                command.Parameters.AddWithValue("@kit_id", int.Parse(numericUpDownKit.Value.ToString()));
                command.ExecuteNonQuery();
            }
            LoadGridView();
        }
        private void ButtonEdit_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count > 0)
            {
                if (checkBoxCondition.Checked == true)
                {
                    int id = (int)dataGridView.SelectedRows[0].Cells[0].Value;
                    NpgsqlCommand command = new NpgsqlCommand("UPDATE devices SET model = @model, serial_number=@serial_number, production_date=@production_date, warranty_period=@warranty_period, condition='1', kind_id=@kind_id, kit_id=@kit_id WHERE Id = @Id", connection);
                    command.Parameters.AddWithValue("@Id", id);
                    command.Parameters.AddWithValue("@model", textBoxModel.Text);
                    command.Parameters.AddWithValue("@kind_id", (int)comboBoxKind.SelectedValue);
                    command.Parameters.AddWithValue("@serial_number", textBoxSerialNumber.Text);
                    command.Parameters.AddWithValue("@production_date", dateTimePickerProductionDate.Value.Date);
                    command.Parameters.AddWithValue("@warranty_period", int.Parse(numericUpDownWarrantyPeriod.Value.ToString()));
                    command.Parameters.AddWithValue("@kit_id", int.Parse(numericUpDownKit.Value.ToString()));
                    command.ExecuteNonQuery();
                } else
                {
                    int id = (int)dataGridView.SelectedRows[0].Cells[0].Value;
                    NpgsqlCommand command = new NpgsqlCommand("UPDATE devices SET model = @model, serial_number=@serial_number, production_date=@production_date, warranty_period=@warranty_period, condition='0', kind_id= @kind_id, kit_id=@kit_id WHERE Id = @Id", connection);
                    command.Parameters.AddWithValue("@Id", id);
                    command.Parameters.AddWithValue("@model", textBoxModel.Text);
                    command.Parameters.AddWithValue("@kind_id", (int)comboBoxKind.SelectedValue);
                    command.Parameters.AddWithValue("@serial_number", textBoxSerialNumber.Text);
                    command.Parameters.AddWithValue("@production_date", dateTimePickerProductionDate.Value.Date);
                    command.Parameters.AddWithValue("@warranty_period", int.Parse(numericUpDownWarrantyPeriod.Value.ToString()));
                    command.Parameters.AddWithValue("@kit_id", int.Parse(numericUpDownKit.Value.ToString()));
                    command.ExecuteNonQuery();
                }
                LoadGridView();
            }
            else
            {
                MessageBox.Show("Please select a row to edit.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void ButtonDelete_Click(object sender, EventArgs e)
        {
            if (dataGridView.SelectedRows.Count > 0)
            {
                int id = (int)dataGridView.SelectedRows[0].Cells[0].Value;
                NpgsqlCommand command = new NpgsqlCommand("DELETE FROM devices WHERE Id = @Id", connection);
                command.Parameters.AddWithValue("@Id", id);
                command.ExecuteNonQuery();
                LoadGridView();
            }
            else
            {
                MessageBox.Show("Please select a row to delete.", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void ButtonRefresh_Click(object sender, EventArgs e)
        {
            LoadGridView();
        }
    }
}