private void CascadingDropDown(Controls.UcComboBox c, Controls.UcComboBox pc, int ztype) { if (pc.Text.Trim() != "") { CRM_ZoneResult rst = zoneLogic.GetInfo(new CRM_ZoneParam { Name_CN = pc.Text }); if (rst != null) { zoneLogic.BindComboBox(c, new CRM_ZoneParam { ZType = ztype, PZID = rst.ZID }); } else { c.DataSource = null; } } else { c.DataSource = null; } }