Question

我试图检索字符串＆＃34; Major-General＆＃34;之前和之后的5个字符。在彭赞斯少将宋的海盗中（见http://www.naic.edu/~gibson/poems/gilbert1.html）。我试图找到一种比我的更好的方法，并试图找出它为什么不循环。任何想法将不胜感激！

l1 =INSTR(l2, string, "Major-General")
l2 = 5
l3 = 1
vcount=0

if vcount <5 then
    l1 =INSTR(l3, string, "Major-General")
    vcount = vcount +1 
    word = mid(string, l1-5, l2 )
    word1 = mid(string, l1+13, l2)
    l3 = l3+l1
    response.write "<br>" & "5 before: " & word & "<br>"  & "5 after: " & word1 
end if

Answer 1

这样做可能更容易：

Dim Poem,aStr,i,block,Left5,Right5

Poem = "The abc poem is abc in this abc string."

aStr = Split(Poem,"abc")

If uBound(aStr) = 0 Then Response.Write "String not found": Response.End

For i = 0 to uBound(aStr)
  block = Trim(aStr(i))
  Left5 = "": Right5 = ""
  if cStr(i) <> cStr(uBound(aStr)) then Left5 = Right(block,5)
  If cStr(i) <> cStr(0) then Right5 = Left(block,5)

  Response.Write "The 5 characters to the left of abc:" & Left5
  Response.Write "The 5 characters to the right of abc:" & Right5

Next

每次字符串存在时，这将获得字符串左侧和右侧的5个字符。

在这种情况下，它将在Poem字符串中搜索abc并将字符串拆分为字符串所在的每个部分的数组，然后可以进一步处理。

VBscript和InStr函数

1 个答案: