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.Data.Odbc;

namespace WinForm
{
    public partial class frmReport : Form
    {
        public frmReport()
        {
            InitializeComponent();
        }

        private void frmReport_Load(object sender, EventArgs e)
        {
            dataGridView1.DataSource = AddData();
        }

        private DataTable AddData()
        {
            string strsql = "select * from navverchgrec";
            OdbcConnection conn = new OdbcConnection("Dsn=PostgreSQLTighten;");
            DataSet ds = new DataSet();

            try
            {
                conn.Open();
                OdbcDataAdapter dat = new OdbcDataAdapter(strsql, conn);
                dat.Fill(ds);

                return ds.Tables[0];
            }
            catch (Exception)
            {
                return null;
            }
            finally
            {
                conn.Close();

                dataGridView1.Columns["aaa"].Visible = false;
            }
        }

        private void button1_Click(object sender, EventArgs e)
        {
            dataGridView1.Columns["aaa"].Visible = !dataGridView1.Columns["aaa"].Visible;
            dataGridView1.Columns["versionname"].Visible = !dataGridView1.Columns["versionname"].Visible;
        }
    }
}