private void nametb_TextChanged(object sender, EventArgs e)
 {
     if (nametb.Text != "")
     {
         dataGridView1.DataSource       = lc.getCustomerByCustomerName(nametb.Text);
         dataGridView1.Columns[0].Width = 30;
         dataGridView1.Columns[1].Width = 60;
         dataGridView1.Columns[2].Width = 140;
         dataGridView1.Columns[3].Width = 160;
         dataGridView1.Columns[6].Width = 80;
         dataGridView1.Columns[7].Width = 80;
         dataGridView1.Columns[8].Width = 50;
     }
 }