Re: find word(s) in string

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From: Jay B. Harlow [MVP - Outlook] (Jay_Harlow_MVP_at_msn.com)
Date: 06/29/04 

Date: Tue, 29 Jun 2004 13:36:37 -0500

Brian,
I would consider using a regular expression.

Something like:
        Const input As String = "One Two ICE Three"
        Const input2 As String = "One NC Two Three"
        Const input3 As String = "NC is the way"
        Const input4 As String = "The train is an ICE"

        Dim re As New
System.Text.RegularExpressions.Regex("(^|\s+)(ICE|NC)($|\s+)",
RegularExpressions.RegexOptions.Compiled)

        Debug.WriteLine(re.IsMatch(input), input)
        Debug.WriteLine(re.IsMatch(input2), input2)
        Debug.WriteLine(re.IsMatch(input3), input3)
        Debug.WriteLine(re.IsMatch(input4), input4)

If you need to know if you matched either ICE or NC, you can use a named
group, something like:

        Dim re As New
System.Text.RegularExpressions.Regex("(^|\s+)(?'tag'ICE|NC)($|\s+)",
RegularExpressions.RegexOptions.Compiled)

        Matchedwhat(re, input)
        Matchedwhat(re, input2)
        Matchedwhat(re, input3)
        Matchedwhat(re, input4)

    Private Shared Sub MatchedWhat(ByVal re As
System.Text.RegularExpressions.Regex, ByVal input As String)
        Dim m As System.Text.RegularExpressions.Match = re.Match(input)
        If m.Success Then
            Debug.WriteLine(m.Groups("tag"), "matched")
        Else
            Debug.WriteLine(False, "failed")
        End If
    End Sub

FWIW: The regular expression I gave is:

(^|\s+) = match either the beginning of the line or one or more whitespace
characters
(ICE|NC) = match either ICE or NC
($|\s+) = match either the ending of the line or one or more whitespace
characters.

Hope this helps
Jay

"BrianDH" <BrianDH@discussions.microsoft.com> wrote in message
news:184B4117-6300-42A2-B992-2C1FDE738E93@microsoft.com...
> I am trying to find "NC" or "ICE" in a string that will vary in length
> Example:
>
> String = "One Two ICE Three"
> Or
> String = "One NC Two Three"
>
> I need to know if "ICE" or "NC" is within the text string.
>
> I have tried "InStr" but it shows true if there is a word that hasthe
letters "NC" withina word.
>
> Any Help
>
> Thank you
>

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