VB常用函数收集[11.15更新...]

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去掉所有HTML标记

Function FilterHTML(str,strlen)
  Dim re
  Set re=new RegExp
  re.IgnoreCase =True
  re.Global=True
  re.Pattern="<(.[^>]*)>"
  str=re.Replace(str,"")
  set re=Nothing
  Dim l,t,c,i
  l=Len(str)
  t=0
  For i=1 to l
    c=Abs(Asc(Mid(str,i,1)))
    If c>255 Then
      t=t+2
    Else
      t=t+1
    End If
    If t>=strlen Then
      cutStr=left(str,i)&"..."
      Exit For
    Else
      cutStr=str
    End If
  Next
  cutStr=Replace(cutStr,chr(10),"")
  cutStr=Replace(cutStr,chr(13),"")
End Function

判断字符串是否是合法的EMail

Public Function IsValidEmail(strEmail As String) As Boolean
Dim names, name, i, c
IsValidEmail = True
  
names = Split(strEmail, "@")

If UBound(names) <> 1 Then
  IsValidEmail = False
  Exit Function
End If

For Each name In names

  If Len(name) <= 0 Then
    IsValidEmail = False
    Exit Function
  End If

  For i = 1 To Len(name)
    c = LCase(Mid(name, i, 1))
    If InStr("abcdefghijklmnopqrstuvwxyz_-.", c) <= 0 And Not IsNumeric(c) Then
      IsValidEmail = False
      Exit Function
    End If
  Next

  If Left(name, 1) = "." Or Right(name, 1) = "." Then
    IsValidEmail = False
    Exit Function
  End If

Next

If InStr(names(1), ".") <= 0 Then
  IsValidEmail = False
  Exit Function
End If

i = Len(names(1)) - InStrRev(names(1), ".")

If i <> 2 And i <> 3 Then
  IsValidEmail = False
  Exit Function
End If

If InStr(strEmail, "..") > 0 Then
  IsValidEmail = False
  Exit Function
End If

End Function

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