Regex.Replace

[cj]

I just ran across this in the VB help. Sounds perfect. Only they don't
tell me what namespace must be imported to use regex. I guess that's
the problem cause I pasted this into a test program and it tell me Regex
is not declared.

Function CleanInput(ByVal strIn As String) As String
' Replace invalid characters with empty strings.
Return Regex.Replace(strIn, "[^\w\.@-]", "")
End Function

[cj]

The help says, "CleanInput returns a string after stripping out all
nonalphanumeric characters except @, - (a dash), and . (a period)."

I also don't get what the \w\ stands for. I get [^.@-] mean anything
but the 3 characters following the ^. I'd assume \w\ means any
alphanumeric character but I don't see that in the documentation on
regular expressions. Can anyone shed any light on this?
cj wrote:

I just ran across this in the VB help. Sounds perfect. Only they don't
tell me what namespace must be imported to use regex. I guess that's
the problem cause I pasted this into a test program and it tell me Regex
is not declared.

Function CleanInput(ByVal strIn As String) As String
' Replace invalid characters with empty strings.
Return Regex.Replace(strIn, "[^\w\.@-]", "")
End Function

[cj]

system.Text.RegularExpressions.Regex.Replace

cj wrote:

I just ran across this in the VB help. Sounds perfect. Only they don't
tell me what namespace must be imported to use regex. I guess that's
the problem cause I pasted this into a test program and it tell me Regex
is not declared.

Function CleanInput(ByVal strIn As String) As String
' Replace invalid characters with empty strings.
Return Regex.Replace(strIn, "[^\w\.@-]", "")
End Function

[Gary Chang[MSFT]]

Hi,

The help says, "CleanInput returns a string after stripping
out all nonalphanumeric characters except @, - (a dash),
and . (a period)."

The help is alright. The [^\w\.@-] should be parsed into [^\w], [^\.],
[^@], and [^-] seperately. The '\w' matches the same as '[A-Za-z0-9_]'.

Thanks!

Best regards,

Gary Chang
Microsoft Online Community Support
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[cj]

Thanks Gary,

Your explanation is really good. I had looked up Regular Expressions in
VB help and it gave me a long list but \w was not in the list. I've
been doing some web searches to learn more. VB help is not very helpful
to me any more.
Gary Chang[MSFT] wrote:

Hi,

The help says, "CleanInput returns a string after stripping
out all nonalphanumeric characters except @, - (a dash),
and . (a period)."

The help is alright. The [^\w\.@-] should be parsed into [^\w], [^\.],
[^@], and [^-] seperately. The '\w' matches the same as '[A-Za-z0-9_]'.

Thanks!

Best regards,

Gary Chang
Microsoft Online Community Support
==================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
==================================================
This posting is provided "AS IS" with no warranties, and confers no rights.

[Gary Chang[MSFT]]

You are very welcome, I am glad to discuss this problem with you. :)

Have a nice weekend!

Best regards,

Gary Chang
Microsoft Online Community Support
==================================================
When responding to posts, please "Reply to Group" via your newsreader so
that others may learn and benefit from your issue.
==================================================
This posting is provided "AS IS" with no warranties, and confers no rights.