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

namespace Sample01
{
    public partial class FrmSyohinSyokai : Form
    {
        public FrmSyohinSyokai()
        {
            InitializeComponent();
        }

        private void btnHyouji_Click(object sender, EventArgs e)
        {
            string connectionString = ConfigurationManager.ConnectionStrings["Db"].ConnectionString;
            using (SqlConnection connection = new SqlConnection(connectionString))
            {
                string sql = "select * from syohin";
                SqlDataAdapter adapter = new SqlDataAdapter(sql, connection);
                DataSet dataSet = new DataSet();
                adapter.Fill(dataSet, "syohin");
                DataTable dataTable = dataSet.Tables["syohin"];
                dgvSyohin.DataSource = dataTable;
            }
        }

        private void btnReset_Click(object sender, EventArgs e)
        {
            dgvSyohin.DataSource = null;
        }
    }
}