ASP.NET上直接可用的DropDownCheckList下拉多选控件,已编译直接添加后可以在工具中拖选使用,非常方便快捷。Createsamultiselectioncheckboxgroupwhichisdisplayedandhiddenontheclientthroughtheuseofacustomdrop-downbox;choicescanbedynamicallycreatedbybindingthecontroltoadatasource