I downloaded a lot of drop-down controls. He gathered multiple DROPDOWNLISTs to list, then binds data according to the category, displayed in the front desk in XML data island, and writes the ONCHAGE event of JavaScript to implement association. Such controls are also very good for multi-level adds pages but if used as a modified modification of multi-level classes, there is a bit problem with the total number of points to access the DropDownList when it is loaded in the Page_load page. The total number of DROPDOWNLIST can be displayed
No way I can only extract the information you want to display a particular parent class subcecy in Page_Load. As the first inserted to DropDownload, it is a bit stupid to date, I can only use this method, I don't know someone. do you know? ?
