Button not firing inside Accordion Panes inside which is inside Update Panel in ASP.NET

 UpdatePanel下使用(Accordion/AccordionPane)<--AJAX開合

在AccordionPane下的Button無法Work

Answer:
在Page_Load中加入：
ScriptManager.GetCurrent(Me.Page).RegisterPostBackControl(but_fileUpload_Img)

如果是在MasterPage下請改用:
ScriptManager.GetCurrent(Me.Master.Page).RegisterPostBackControl(but_fileUpload_Img)

參考：http://stackoverflow.com/questions/27815108/button-not-firing-inside-accordion-panes-inside-which-is-inside-update-panel-in