public void DownloadSubList() { DataControl.BLUser objUser = new BLUser(); DataControl.CurrentInfo objCurInfo = new CurrentInfo(); string companyCode = objCurInfo.GetCompanyCode(); DataSet Ds = new DataSet(); Ds = objUser.DownloadSubList(companyCode); Ds.Tables[0].TableName = "State Details"; Ds.Tables[1].TableName = "City Details"; Ds.Tables.RemoveAt(3); Ds.Tables.RemoveAt(2); HttpResponse response = System.Web.HttpContext.Current.Response; DownloadExcel excel = new DownloadExcel(); excel.Convert(Ds, "State_City" + "_" + DateTime.Now.ToShortDateString(), response); }