Factory/FormAddOrder.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace СУБД_Фабрика
{
    public partial class FormAddOrder : Form
    {
        public FormAddOrder()
        {
            InitializeComponent();
        }
        SqlConnection Con = new SqlConnection(FormMain.txtCon);
        private void FormAddOrder_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'sewingFactoryMURDataSet1.Furnitura' table. You can move, or remove it, as needed.
            this.furnituraTableAdapter.Fill(this.sewingFactoryMURDataSet1.Furnitura);
            // TODO: This line of code loads data into the 'sewingFactoryMURDataSet1.Cloth' table. You can move, or remove it, as needed.
            this.clothTableAdapter.Fill(this.sewingFactoryMURDataSet1.Cloth);
            // TODO: This line of code loads data into the 'sewingFactoryMURDataSet1.Izdelia' table. You can move, or remove it, as needed.
            this.izdeliaTableAdapter.Fill(this.sewingFactoryMURDataSet1.Izdelia);
            // TODO: This line of code loads data into the 'sewingFactoryMURDataSet1.Orders' table. You can move, or remove it, as needed.
            this.ordersTableAdapter.Fill(this.sewingFactoryMURDataSet1.Orders);

            BsZak.AddNew();
            BsZak.Position = BsZak.Count - 1;
            CbxCloth.SelectedIndex = 0;
            CbxFurn.SelectedIndex = 0;
            CbxIzd.SelectedIndex = 0;
            LblCountFur.Hide();
            LblCountIzd.Hide();
            LblIDMen.Hide();
            LblIDZak.Hide();
        }

        private void BtnCreateOrder_Click(object sender, EventArgs e)
        {
            int f, i;
            if(TbxCountFur.Text == "" || TbxCountIzd.Text == "")
            {
                MessageBox.Show("Не все данные заполнены", "Внимание", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }

            try
            {
                f = int.Parse(TbxCountFur.Text);
                i = int.Parse(TbxCountIzd.Text);
            }
            catch
            {
                MessageBox.Show("Данные по количеству введены неверно", "Внимание", MessageBoxButtons.OK, MessageBoxIcon.Information);
                return;
            }
            LblCountFur.Text = TbxCountFur.Text;
            LblCountIzd.Text = TbxCountIzd.Text;
            LblIDZak.Text = FormMain.IDUser;
            string txtQuery = $@"select IDUser from Users where Role = 2 and IDUser not in (select IDMen from Orders)";
            Con.Open();

            SqlCommand query = new SqlCommand(txtQuery, Con);
            SqlDataReader res = query.ExecuteReader();
            if (res.Read())
            {
                LblIDMen.Text = res["User"].ToString();
                Con.Close();
            }
            else
            {
                Con.Close();
                txtQuery = $@"select IDMen, (select COUNT(*) from Orders where IDMen = o.IDMen) as co from Orders o group by IDMen order by co";
                Con.Open();
                query = new SqlCommand(txtQuery, Con);
                res = query.ExecuteReader();
                res.Read();
                LblIDMen.Text = res["IDMen"].ToString();
                Con.Close();
            }
            BsZak.EndEdit();
            this.ordersTableAdapter.Update(this.sewingFactoryMURDataSet1.Orders);
            this.ordersTableAdapter.Fill(this.sewingFactoryMURDataSet1.Orders);
            Close();
        }
    }
}