//Bind data source void assignMent( ) { DataTable dt = _bll.getColumnOnly( ); lupOdd.Properties.DataSource = dt.Copy( ).DefaultView.ToTable(true, "CH001"); lupOdd.Properties.DisplayMember = "CH001"; lupUser.Properties.DataSource = dt.Copy( ).DefaultView.ToTable(true, "CH005"); lupUser.Properties.DisplayMember = "CH005"; }