Validating a control - contains only numbers and not null

[Stephen Adam]

Hi there,

I want to ensure that a text box contains a number and is not blank. I'm
using the regular expression validator to do this with this line

ValidationExpression="[0-9]+"

This expression works when I enter input which is not numeric but it will
not work when I leave the field blank. I've tried quite a few variations on
the regular expression but i'm getting nowhere. How can I check for a
non-null numeric value??

Thanks

Steve

[Ken Tucker [MVP]]

Hi,

Dim regNum As New
System.Text.RegularExpressions.Regex("^(\d|-)?(\d|,)*\.?\d*$")

MessageBox.Show(regNum.IsMatch(TextBox1.Text).ToSt ring)

Ken

----------------------

"Stephen Adam" <st**********@ntlworld.com> wrote in message
news:qM************@newsfe1-gui.ntli.net...
Hi there,

I want to ensure that a text box contains a number and is not blank. I'm
using the regular expression validator to do this with this line

ValidationExpression="[0-9]+"

This expression works when I enter input which is not numeric but it will
not work when I leave the field blank. I've tried quite a few variations on
the regular expression but i'm getting nowhere. How can I check for a
non-null numeric value??

Thanks

Steve

[Ken Tucker [MVP]]

Hi,

Dim regNum As New
System.Text.RegularExpressions.Regex("^(\d|-)?(\d|,)*\.?\d*$")

MessageBox.Show(regNum.IsMatch(TextBox1.Text).ToSt ring)

Ken

----------------------

"Stephen Adam" <st**********@ntlworld.com> wrote in message
news:qM************@newsfe1-gui.ntli.net...
Hi there,

I want to ensure that a text box contains a number and is not blank. I'm
using the regular expression validator to do this with this line

ValidationExpression="[0-9]+"

This expression works when I enter input which is not numeric but it will
not work when I leave the field blank. I've tried quite a few variations on
the regular expression but i'm getting nowhere. How can I check for a
non-null numeric value??

Thanks

Steve

[Stephen Adam]

Thanks for the help :)

"Ken Tucker [MVP]" <vb***@bellsouth.net> wrote in message
news:%2****************@TK2MSFTNGP09.phx.gbl...

Hi,

Dim regNum As New
System.Text.RegularExpressions.Regex("^(\d|-)?(\d|,)*\.?\d*$")

MessageBox.Show(regNum.IsMatch(TextBox1.Text).ToSt ring)

Ken

----------------------

"Stephen Adam" <st**********@ntlworld.com> wrote in message
news:qM************@newsfe1-gui.ntli.net...
Hi there,

I want to ensure that a text box contains a number and is not blank. I'm
using the regular expression validator to do this with this line

ValidationExpression="[0-9]+"

This expression works when I enter input which is not numeric but it will
not work when I leave the field blank. I've tried quite a few variations on the regular expression but i'm getting nowhere. How can I check for a
non-null numeric value??

Thanks

Steve

[Stephen Adam]

Thanks for the help :)

"Ken Tucker [MVP]" <vb***@bellsouth.net> wrote in message
news:%2****************@TK2MSFTNGP09.phx.gbl...

Hi,

Dim regNum As New
System.Text.RegularExpressions.Regex("^(\d|-)?(\d|,)*\.?\d*$")

MessageBox.Show(regNum.IsMatch(TextBox1.Text).ToSt ring)

Ken

----------------------

"Stephen Adam" <st**********@ntlworld.com> wrote in message
news:qM************@newsfe1-gui.ntli.net...
Hi there,

I want to ensure that a text box contains a number and is not blank. I'm
using the regular expression validator to do this with this line

ValidationExpression="[0-9]+"

This expression works when I enter input which is not numeric but it will
not work when I leave the field blank. I've tried quite a few variations on the regular expression but i'm getting nowhere. How can I check for a
non-null numeric value??

Thanks

Steve