public void BindListBox() { Bill_Sys_Document_Manager _Bill_Sys_Document_Manager = new Bill_Sys_Document_Manager(); DataSet dsmergedoc = new DataSet(); dsmergedoc = _Bill_Sys_Document_Manager.GetDocumentmanagerMerge(); lstPDF.DataSource = dsmergedoc; lstPDF.DataTextField = "SZ_FILENAME"; lstPDF.DataValueField = "SZ_IMAGEID"; lstPDF.DataBind(); }