Regular Expression Weirdness

[George Durzi]

If I have a regexvalidator in a webform with a validation expression of
^[+]?[0-9]\d* and I put the text 2d in a text box being validated by this
validator, the validator fires.

This regex is a simple one that only allows the user to enter integer
values.

However, if I do this on the server side like this

Regex rx = new Regex(@"^[+]?[0-9]\d*");
Match mt = rx.Match("2d");

I get success!!!! why?? is there an option I should be setting?

[Karl]

I think the regularexpressionvalidator automatically puts ^ at the start and
$ at the end...2d DOES match ^[+]?[0-9]\d* but it DOES NOT match
^[+]?[0-9]\d*$ (note the extra $ at the end). That's the difference
between the two.

Also, [0-9]\d* can be rewritten as \d+

Karl

"George Durzi" <gd****@hotmail.com> wrote in message
news:%2******************@tk2msftngp13.phx.gbl...

If I have a regexvalidator in a webform with a validation expression of
^[+]?[0-9]\d* and I put the text 2d in a text box being validated by this
validator, the validator fires.

This regex is a simple one that only allows the user to enter integer
values.

However, if I do this on the server side like this

Regex rx = new Regex(@"^[+]?[0-9]\d*");
Match mt = rx.Match("2d");

I get success!!!! why?? is there an option I should be setting?

[George Durzi]

Karl,
Thank you again, that worked perfectly.

And thanks for the regex refining tip :)

"Karl" <none> wrote in message news:OO**************@tk2msftngp13.phx.gbl...

I think the regularexpressionvalidator automatically puts ^ at the start and $ at the end...2d DOES match ^[+]?[0-9]\d* but it DOES NOT match
^[+]?[0-9]\d*$ (note the extra $ at the end). That's the difference
between the two.

Also, [0-9]\d* can be rewritten as \d+

Karl

"George Durzi" <gd****@hotmail.com> wrote in message
news:%2******************@tk2msftngp13.phx.gbl...

If I have a regexvalidator in a webform with a validation expression of
^[+]?[0-9]\d* and I put the text 2d in a text box being validated by this validator, the validator fires.

This regex is a simple one that only allows the user to enter integer
values.

However, if I do this on the server side like this

Regex rx = new Regex(@"^[+]?[0-9]\d*");
Match mt = rx.Match("2d");

I get success!!!! why?? is there an option I should be setting?

[S. Justin Gengo]

George,

Glad you got it working. (Good eyes Karl!)

Just a note: You could also use a CompareValidator instead of the
RegularExpressionValidator. If you leave the CompareValidator's
ControlToCompare property blank and set it's Operator property to
DataTypeCheck you may then set it's Type property to check if a value
entered is a String, Integer, Double, Date, or Currency.

While I love that I can do almost anything with the regular expression
validator I find simple data type checks much easier to set up with the
CompareValidator.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"George Durzi" <gd****@hotmail.com> wrote in message
news:uJ*************@TK2MSFTNGP10.phx.gbl...

Karl,
Thank you again, that worked perfectly.

And thanks for the regex refining tip :)

"Karl" <none> wrote in message
news:OO**************@tk2msftngp13.phx.gbl...

I think the regularexpressionvalidator automatically puts ^ at the start

and

$ at the end...2d DOES match ^[+]?[0-9]\d* but it DOES NOT match
^[+]?[0-9]\d*$ (note the extra $ at the end). That's the difference
between the two.

Also, [0-9]\d* can be rewritten as \d+

Karl

"George Durzi" <gd****@hotmail.com> wrote in message
news:%2******************@tk2msftngp13.phx.gbl...

> If I have a regexvalidator in a webform with a validation expression of
> ^[+]?[0-9]\d* and I put the text 2d in a text box being validated by this > validator, the validator fires.
>
> This regex is a simple one that only allows the user to enter integer
> values.
>
> However, if I do this on the server side like this
>
> Regex rx = new Regex(@"^[+]?[0-9]\d*");
> Match mt = rx.Match("2d");
>
> I get success!!!! why?? is there an option I should be setting?
>
>

[George Durzi]

That is a great tip!!! Thank you much! The regularexpressionvalidators do
seem like a little overkill for simple type checks

"S. Justin Gengo" <sjgengo@aboutfortunate[no-spam].com> wrote in message
news:10*************@corp.supernews.com...

George,

Glad you got it working. (Good eyes Karl!)

Just a note: You could also use a CompareValidator instead of the
RegularExpressionValidator. If you leave the CompareValidator's
ControlToCompare property blank and set it's Operator property to
DataTypeCheck you may then set it's Type property to check if a value
entered is a String, Integer, Double, Date, or Currency.

While I love that I can do almost anything with the regular expression
validator I find simple data type checks much easier to set up with the
CompareValidator.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"George Durzi" <gd****@hotmail.com> wrote in message
news:uJ*************@TK2MSFTNGP10.phx.gbl...

Karl,
Thank you again, that worked perfectly.

And thanks for the regex refining tip :)

"Karl" <none> wrote in message
news:OO**************@tk2msftngp13.phx.gbl...

I think the regularexpressionvalidator automatically puts ^ at the start

and

$ at the end...2d DOES match ^[+]?[0-9]\d* but it DOES NOT match
^[+]?[0-9]\d*$ (note the extra $ at the end). That's the difference
between the two.

Also, [0-9]\d* can be rewritten as \d+

Karl

"George Durzi" <gd****@hotmail.com> wrote in message
news:%2******************@tk2msftngp13.phx.gbl...
> If I have a regexvalidator in a webform with a validation expression

of > ^[+]?[0-9]\d* and I put the text 2d in a text box being validated by

this

> validator, the validator fires.
>
> This regex is a simple one that only allows the user to enter integer
> values.
>
> However, if I do this on the server side like this
>
> Regex rx = new Regex(@"^[+]?[0-9]\d*");
> Match mt = rx.Match("2d");
>
> I get success!!!! why?? is there an option I should be setting?
>
>

[S. Justin Gengo]

George,

You're welcome. Thanks for the praise. :-)

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"George Durzi" <gd****@hotmail.com> wrote in message
news:Om**************@TK2MSFTNGP10.phx.gbl...

That is a great tip!!! Thank you much! The regularexpressionvalidators do
seem like a little overkill for simple type checks

"S. Justin Gengo" <sjgengo@aboutfortunate[no-spam].com> wrote in message
news:10*************@corp.supernews.com...

George,

Glad you got it working. (Good eyes Karl!)

Just a note: You could also use a CompareValidator instead of the
RegularExpressionValidator. If you leave the CompareValidator's
ControlToCompare property blank and set it's Operator property to
DataTypeCheck you may then set it's Type property to check if a value
entered is a String, Integer, Double, Date, or Currency.

While I love that I can do almost anything with the regular expression
validator I find simple data type checks much easier to set up with the
CompareValidator.

--
Sincerely,

S. Justin Gengo, MCP
Web Developer / Programmer

www.aboutfortunate.com

"Out of chaos comes order."
Nietzsche
"George Durzi" <gd****@hotmail.com> wrote in message
news:uJ*************@TK2MSFTNGP10.phx.gbl...

> Karl,
> Thank you again, that worked perfectly.
>
> And thanks for the regex refining tip :)
>
> "Karl" <none> wrote in message
> news:OO**************@tk2msftngp13.phx.gbl...
>> I think the regularexpressionvalidator automatically puts ^ at the start > and
>> $ at the end...2d DOES match ^[+]?[0-9]\d* but it DOES NOT match
>> ^[+]?[0-9]\d*$ (note the extra $ at the end). That's the difference
>> between the two.
>>
>> Also, [0-9]\d* can be rewritten as \d+
>>
>> Karl
>>
>> "George Durzi" <gd****@hotmail.com> wrote in message
>> news:%2******************@tk2msftngp13.phx.gbl...
>> > If I have a regexvalidator in a webform with a validation expression of >> > ^[+]?[0-9]\d* and I put the text 2d in a text box being validated by
> this
>> > validator, the validator fires.
>> >
>> > This regex is a simple one that only allows the user to enter
>> > integer
>> > values.
>> >
>> > However, if I do this on the server side like this
>> >
>> > Regex rx = new Regex(@"^[+]?[0-9]\d*");
>> > Match mt = rx.Match("2d");
>> >
>> > I get success!!!! why?? is there an option I should be setting?
>> >
>> >
>>
>>
>
>