uuuu/demo26052026/Form2.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 demo26052026
{
    public partial class Form2 : Form
    {
        int IDs { get; set; }
        static string ConnString = "Server=localhost;Port=5432;Database=newdemo262;Username=postgres;Password=Swa2sWA13;";
        public Form2(int ID)
        {
            IDs = ID;
            InitializeComponent();
            if (ID != 0)
            {
                NpgsqlConnection npgsqlConnection = new NpgsqlConnection(ConnString);
                npgsqlConnection.Open();
                NpgsqlCommand npgsqlCommand = new NpgsqlCommand(@$"SELECT ""Articul"", ""Naim_ID"", ""Ed_izm"", ""Cena"", ""Postav_ID"", ""Proizvod_ID"", ""Kategory_ID"", ""Skidka"", ""Kolichestvo"", ""Opisanie"", ""Photo"", ""ID_Tovar"" FROM public.""Tovar"" WHERE ""ID_Tovar"" = {ID};", npgsqlConnection);
                DataTable dataTable = new DataTable();
                dataTable.Load(npgsqlCommand.ExecuteReader());


                comboBox1.SelectedIndex = int.Parse(dataTable.Rows[0].ItemArray[1].ToString()) - 1;
                comboBox2.SelectedIndex = int.Parse(dataTable.Rows[0].ItemArray[6].ToString()) - 1;
                textBox1.Text = dataTable.Rows[0].ItemArray[0].ToString();

                textBox2.Text = dataTable.Rows[0].ItemArray[9].ToString();
                comboBox3.SelectedIndex = int.Parse(dataTable.Rows[0].ItemArray[5].ToString()) - 1;
                comboBox4.SelectedIndex = int.Parse(dataTable.Rows[0].ItemArray[4].ToString()) - 1;

                textBox3.Text = dataTable.Rows[0].ItemArray[3].ToString();
                comboBox5.SelectedIndex = 0;

                textBox4.Text = dataTable.Rows[0].ItemArray[8].ToString();
                textBox5.Text = dataTable.Rows[0].ItemArray[7].ToString();

                if (dataTable.Rows[0].ItemArray[10].ToString() != "")
                {
                    pictureBox1.Image = Image.FromFile(dataTable.Rows[0].ItemArray[10].ToString());
                    PhotoPath = dataTable.Rows[0].ItemArray[10].ToString();
                }
                else
                {
                    pictureBox1.Image = Image.FromFile("picture.png");
                }


                npgsqlConnection.Close();
            }
        }

        string PhotoPath = "picture.png";
        private void pictureBox1_Click(object sender, EventArgs e)
        {
            OpenFileDialog openFileDialog = new OpenFileDialog();
            if(openFileDialog.ShowDialog() == DialogResult.OK)
            {
                PhotoPath = openFileDialog.FileName;
            }

        }

        private void button3_Click(object sender, EventArgs e)
        {
            this.Hide();
            Form1 form1 = new Form1();
            form1.ShowDialog();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (IDs == 0)
            {
                NpgsqlConnection npgsqlConnection = new NpgsqlConnection(ConnString);
                npgsqlConnection.Open();
                NpgsqlCommand npgsqlCommand = new NpgsqlCommand(@$"INSERT INTO public.""Tovar""(""Articul"", ""Naim_ID"", ""Ed_izm"", ""Cena"", ""Postav_ID"", ""Proizvod_ID"", ""Kategory_ID"", ""Skidka"", ""Kolichestvo"", ""Opisanie"", ""Photo"") VALUES ('{textBox1.Text}', {comboBox2.SelectedIndex + 1}, '{comboBox5.SelectedItem.ToString()}', {textBox3.Text}, {comboBox4.SelectedIndex + 1}, {comboBox3.SelectedIndex + 1}, {comboBox1.SelectedIndex + 1}, {textBox5.Text}, {textBox4.Text}, {textBox2.Text}, {PhotoPath});", npgsqlConnection);
                npgsqlCommand.ExecuteNonQuery();
                npgsqlConnection.Close();
                MessageBox.Show("Запись успешно внесенна");
            }
            else
            {
                NpgsqlConnection npgsqlConnection = new NpgsqlConnection(ConnString);
                npgsqlConnection.Open();
                NpgsqlCommand npgsqlCommand = new NpgsqlCommand(@$"UPDATE public.""Tovar"" SET ""Articul""='{textBox1.Text}', ""Naim_ID""={comboBox2.SelectedIndex + 1}, ""Ed_izm""='{comboBox5.SelectedItem.ToString()}', ""Cena""= {textBox3.Text}, ""Postav_ID""={comboBox4.SelectedIndex + 1}, ""Proizvod_ID""={comboBox3.SelectedIndex + 1}, ""Kategory_ID""={comboBox1.SelectedIndex + 1}, ""Skidka""={textBox5.Text}, ""Kolichestvo""={textBox4.Text}, ""Opisanie""={textBox2.Text}, ""Photo""={PhotoPath} WHERE ""ID_Tovar""= {IDs};", npgsqlConnection);
                npgsqlCommand.ExecuteNonQuery();
                npgsqlConnection.Close();
                MessageBox.Show("Запись успешно измененна");
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            NpgsqlConnection npgsqlConnection = new NpgsqlConnection(ConnString);
            npgsqlConnection.Open();
            NpgsqlCommand npgsqlCommand = new NpgsqlCommand(@$"DELETE FROM public.""Tovar"" WHERE ""ID_Tovar"" = {IDs};", npgsqlConnection);
            npgsqlCommand.ExecuteNonQuery();
            npgsqlConnection.Close();
        }
    }
}