测字符串长度函数

March 25,2004

'*************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