http://stackoverflow.com/questions/7385923/the-print-button-doesnt-appear-in-firefox
"This is because the print button is an Active-X control and Active-X controls work only with Internet explorer
For the rest of browsers export to pdf or excel and print from the application
In case the entire report renders in one page, you can use the browser print button to print the report"
会不会真的如这个人说的,没法实现打印按钮。只有先导出成PDF在打印?