Delphi判断双字节，用法简单，在窗口输入框中输入字符串，单击按钮即可，程序会判断出是否包含有双字节字符，判断方法请看下边的代码段：
s := Edit1.Text;
i := 0;
while i begin
if (ByteType(S,i) <> mbSingleByte) then
begin
s1 := s1+ copy(s,i,2)+;
i := i+2;
end
else
i:= i+1;
end;
label2.Caption := trim(s1);
SHOW FULL COLUMNS FROM `jrk_downrecords` [ RunTime:0.001727s ]
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:0.190988s ]
SHOW FULL COLUMNS FROM `jrk_tagrecords` [ RunTime:0.001468s ]
SELECT * FROM `jrk_tagrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 20 [ RunTime:0.001616s ]
SHOW FULL COLUMNS FROM `jrk_member` [ RunTime:0.002104s ]
SELECT `id`,`username`,`userhead`,`usertime` FROM `jrk_member` WHERE `status` = 1 ORDER BY `usertime` DESC LIMIT 10 [ RunTime:0.004280s ]
SHOW FULL COLUMNS FROM `jrk_searchrecords` [ RunTime:0.004278s ]
SELECT * FROM `jrk_searchrecords` WHERE `status` = 1 ORDER BY `num` DESC LIMIT 5 [ RunTime:0.004980s ]
SELECT aid,title,count(aid) as c FROM `jrk_downrecords` GROUP BY `aid` ORDER BY `c` DESC LIMIT 10 [ RunTime:0.015997s ]
SHOW FULL COLUMNS FROM `jrk_articles` [ RunTime:0.001263s ]
UPDATE `jrk_articles` SET `hits` = 2 WHERE `id` = 294432 [ RunTime:0.027308s ]
