private void PopulateData() { List <MDrugsDTO> lstdrugs = new List <MDrugsDTO>(); lstdrugs = objITransactionBusiness.GetMDrugs(); if (lstdrugs != null && lstdrugs.Count > 0) { ListView1.DataSource = lstdrugs; ListView1.DataBind(); } else { ListView1.Items.Clear(); ListView1.DataSource = null; ListView1.DataBind(); } }