הקוד של היום–קבוצת יבנה

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;

namespace GalleryProject1

{

    public partial class custWin : Form

    {

        dbEntities db = new dbEntities();

        public custWin()

        {

            InitializeComponent();

        }

        private void button1_Click(object sender, EventArgs e)

        {

            orderTBL o1 = new orderTBL();

            customerTBL c1 = (customerTBL)comboBox1.SelectedItem;

            o1.custID = c1.Id;

            o1.date = dateTimePicker1.Value;

            o1.description = textBox1.Text;

            db.orderTBL.Add(o1);

            db.SaveChanges();

            MessageBox.Show("ההזמנה עודכנה בהצלחה");

            custWin_Load(sender, e);

        }

        private void custWin_Load(object sender, EventArgs e)

        {

            label4.Text = "";

            label5.Text = "";

            var tmp = (from s in db.customerTBL select s).ToList();

            comboBox1.DataSource = tmp;

            comboBox1.DisplayMember = "FirstName";

            comboBox1.ValueMember = "Id";

            var tmp2 = (from s in db.orderTBL orderby s.date select s).ToList();

            dataGridView1.DataSource = tmp2;

            dataGridView1.Columns[0].HeaderText = "מס הזמנה";

        }

        private void comboBox1_SelectedIndexChanged(object sender, EventArgs e)

        {

            customerTBL c1 = (customerTBL)comboBox1.SelectedItem;

            label4.Text = c1.FirstName;

            label5.Text = c1.LastName;

        }

    }

}