打开文件对话框，实现对图象，文本等预览。该程序提供了如何修改定植标准对话框的方法，值得收藏。-open file dialog to achieve right image, text, etc. preview. The program offers ways to amend the standard dialog planting methods, it is worth collecting.
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001297s ]
SELECT `a`.`aid`,`a`.`title`,`a`.`create_time`,`m`.`username` FROM `jrk_downrecords` `a` INNER JOIN `jrk_member` `m` ON `a`.`uid`=`m`.`id` WHERE `a`.`status` = 1 GROUP BY `a`.`aid` ORDER BY `a`.`create_time` DESC LIMIT 10 [ RunTime:0.126790s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001541s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.003048s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.001702s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.005371s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.001134s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004299s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015046s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001300s ]
UPDATE `jrk_articles` SET `hits` = 1 WHERE `id` = 128099 [ RunTime:0.001282s ]
