Best way to check a string for a list of words

Posted on 2003-02-28
Medium Priority
Last Modified: 2010-05-03
I have a list of "banned words," and I have a string.  I want to check the string to see if it has any of the banned words in it.

What is the best way to go about this?
Question by:bomax
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LVL 18

Expert Comment

ID: 8046697
Use Instr function in VB. If the function returns a value more than equal to 1 then it means that the word is there in the string.

Author Comment

ID: 8046706
Right, but I figured that the InStr fuction means if strString contains ALL OFF strProhibitedWord then return true.  I.e. the string would need to contain all the banned words, and it would not return true if it contained just ONE of those words in the list.
LVL 53

Expert Comment

by:Ryan Chong
ID: 8046809
You can do a multiple checking using Intr function to check it , if all of the items in list to compare matched then return true else return false.

Expert Comment

ID: 8047208
Private Sub Command1_Click()
'list of "banned words"
List1.AddItem "Word1"
List1.AddItem "Word2"
List1.AddItem "Word3"

strstring = "This is an example string with Word1"

answer = Check_String_For_Banned_Words(strstring)
End Sub

Function Check_String_For_Banned_Words(strstring) As String
 For i = 0 To List1.ListCount - 1
  If InStr(strstring, List1.List(i)) > 0 Then
   Check_String_For_Banned_Words = List1.List(i)
  End If
End Function

Accepted Solution

kalihto earned 80 total points
ID: 8047275
Try this function

'   If HasBannedWord("this is a b3", "b1", "b2", "b3") Then
'     Msgbox "good statement"
'   else
'     Msgbox "Dont use a banned word"
'   end if
Public Function HasBannedWord(ByVal strString As String, ParamArray BannedWords()) As Boolean
    HasBannedWord = False
Dim i&
    For i = 0 To UBound(BannedWords)
        If InStr(strString, BannedWords(i)) > 0 Then
            HasBannedWord = True
            Exit Function
        End If
End Function


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