Thats a handfull. Perl Regex (which I believe .NET implements) would be<br><br>/[0-9]{10}/ ... And to be absolutely sure : /[0-9]{10,10}/<br><br>Its also possible that the slight differences between these regex engines is the reason our good friend was pulling at his hairs.<br>
 <br clear="all">--<br>Ndungi Kyalo<br><a href="http://biblia.kenya.or.ke">biblia.kenya.or.ke</a><br><br><br>
<br><br><div class="gmail_quote">On Wed, Mar 3, 2010 at 11:44 AM,  <span dir="ltr">&lt;<a href="mailto:ashok%2Bskunkworks@parliaments.info">ashok+skunkworks@parliaments.info</a>&gt;</span> wrote:<br><blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
<div class="im">On Wed, Mar 3, 2010 at 2:23 PM, Simon Mbuthia &lt;<a href="mailto:simon.mbuthia@gmail.com">simon.mbuthia@gmail.com</a>&gt; wrote:<br>
&gt; Never mind, I used<br>
&gt; if (!match.Success || txtAccountNum.Text.Length != 10) throw Exception else<br>
&gt; Endelea()<br>
&gt;<br>
<br>
</div>the posix regex for 10 digits looks like this :<br>
[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]<br>
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