Fatal error: Uncaught exception 'com_exception' with message '<b>Source:</b> Provider<br/><b>Description:</b> 未指定的错误' in D:\wwwroot\xiaodelan\wwwroot\showbooks.php:16 Stack trace: #0 D:\wwwroot\xiaodelan\wwwroot\showbooks.php(16): com->Open('DRIVER={Microso...') #1 {main} thrown in D:\wwwroot\xiaodelan\wwwroot\showbooks.php on line 16