private void cmb_range_SelectedIndexChanged(object sender, EventArgs e) { if (cmb_range.SelectedIndex == 0) { txt_mem_nos.Text = "ALL"; txt_mem_nos.Enabled = false; } else if (cmb_range.SelectedIndex == 1) { txt_mem_nos.Enabled = true; txt_mem_nos.Text = ""; } else { txt_mem_nos.Enabled = false; txt_mem_nos.Text = MGC.GetMemberGroup(cmb_range.Text).MemberNosText; } }