regular expression problem

[kieran]

Hi,

I want to create a regular expression on a web form that allows the
user to input a maximum of 7 characters (these characters can be either
letters or numbers) but no full stops.

I cant seem to get this right.

Any input or simple regular expression tutorials appreciated.

Thanks.

[Samuel Shulman]

Re: regular expression problem

I think that you can use the text_changed event (that will be server side
processing)

btw, this is VB group not ASP

hth,
Samuel Shulman

"kieran" <kieran5405@hot mail.comwrote in message
news:1152548908 .721896.210940@ 75g2000cwc.goog legroups.com...

>
Hi,
>
I want to create a regular expression on a web form that allows the
user to input a maximum of 7 characters (these characters can be either
letters or numbers) but no full stops.
>
I cant seem to get this right.
>
Any input or simple regular expression tutorials appreciated.
>
Thanks.
>

[Branco Medeiros]

Re: regular expression problem

kieran wrote:
<snip>

I want to create a regular expression on a web form that allows the
user to input a maximum of 7 characters (these characters can be either
letters or numbers) but no full stops.

<snip>

Regardless of where and how you'd use the regex, I guess you can use
the following, which will match 1 up to seven alphanumeric chars:

Function IsValidInput(By Val Text As String) As Boolean
Return System.Text.Reg ularExpressions .Regex.IsMatch( _
Text, "^(\w|\d){1,7}$ " _
)
End Function

The regex above will match the whole string (the "^" requires that the
match begins at the begining of the string, and the "$" requires that
the match ends at the end of the string). It will match 1 to 7
occurrences (the "{1, 7}" operator) of letters ("\w") or digits ("\d").

HTH.

Regards,

Branco.

[kieran]

Re: regular expression problem


cheers Branco...




Branco Medeiros wrote:

kieran wrote:
<snip>

I want to create a regular expression on a web form that allows the
user to input a maximum of 7 characters (these characters can be either
letters or numbers) but no full stops.

<snip>
>
Regardless of where and how you'd use the regex, I guess you can use
the following, which will match 1 up to seven alphanumeric chars:
>
Function IsValidInput(By Val Text As String) As Boolean
Return System.Text.Reg ularExpressions .Regex.IsMatch( _
Text, "^(\w|\d){1,7}$ " _
)
End Function
>
The regex above will match the whole string (the "^" requires that the
match begins at the begining of the string, and the "$" requires that
the match ends at the end of the string). It will match 1 to 7
occurrences (the "{1, 7}" operator) of letters ("\w") or digits ("\d").
>
HTH.
>
Regards,
>
Branco.