SETECT SQL.cs

SqlConnection sql = new SqlConnection(@"Data Source=(LocalDB)\v11.0;AttachDbFilename=|DataDirectory|\Database1.mdf;Integrated Security=True;Connect Timeout=30");
SqlCommand cmd = new SqlCommand("select * from [Table]", sql);
sql.Open();
SqlDataReader reader = cmd.ExecuteReader();
if (reader.HasRows)
{
    while (reader.Read())
    {
        listView1.Items.Insert(0, reader[0].ToString());
        listView1.Items[0].SubItems.Add(reader[1].ToString());
    }
}
reader.Close();
sql.Close();