private void comboBox1_SelectedValueChanged(object sender, EventArgs e)
{
limit = Convert.ToInt32(comboBox1.SelectedItem.ToString().Trim());
total_page = Math.Ceiling((double)total_record / limit);
txtPage.Text = current_page + "/" + total_page;
PhanTrang.toGridView(limit, start, bunifuDataGridView1, tableName);
}
