可以添加的下拉列表框 你可以绑定数所表也可以自己添加，会自己保存到数据库中去。-ajaxtextbox you can add or dropdown!your websitue is a dog! your mather and father both old dog

combobox下拉实现出现多列，c#中工具里的combobox中只能下拉显示一列的内容通过重写combobox来达到下拉实现多列的目的！-combobox dropdown realize there is more out

menu-aim 是一个 jQuery 下拉菜单插件，该插件能够甄别用户是尝试移动鼠标到下拉列表项还是将鼠标移至子菜单内容上。(menu-aim is a jQuery plugin for dropdown menus that can differentiate between a user trying hover over a dropdown item vs trying to navigate into a submenu's contents.)

cascade one dropdown list with other dropdown list in asp.net