测字符串长度函数_asp技巧

*************测字符串长度**************

Function CheckStringLength(txt)
txt=trim(txt)
x = len(txt)
y = 0
for ii = 1 to x
if asc(mid(txt,ii,1)) < 0 or asc(mid(txt,ii,1)) >255 then 如果是汉字
y = y + 2
else
y = y + 1
end if
next
CheckStringLength = y

End Function

************* 截取字符串 **************

function InterceptString(txt,length)
txt=trim(txt)
x = len(txt)
y = 0
if x >= 1 then
for ii = 1 to x
if asc(mid(txt,ii,1)) < 0 or asc(mid(txt,ii,1)) >255 then 如果是汉字
y = y + 2
else
y = y + 1
end if
if y >= length then
txt = left(trim(txt),ii) 字符串限长
exit for
end if
next
InterceptString = txt
else
InterceptString = ""
end if

End Function