ASP.NET下拉多选框控件

ASP.NET下拉多选框控件，内含源码，说明文档，实例。ASP.NET下拉多选框控件，内含源码，说明文档，实例。Createsamultiselectioncheckboxgroupwhichisdisplayedandhiddenontheclientthroughtheuseofacustomdrop-downbox;choicescanbedynamicallycreatedbybindingthecontroltoadatasource