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Worked like a charm! thank you for the quick turn around on your answer. really helped!
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Worked like a charm! thank you for the quick turn around on your answer. really helped!

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I have a textbox in a form where I need to enter the number of users. I need to make sure the person enters a number on that field. How can I validate that field?<br />
code----<br />
&lt;tr&gt;<br />
&lt;td class=&quot;NavyBold&quot;&gt;Number of Users<br />
&lt;br&gt;<br />
(if multiple users):&lt;/td&gt;<br />
&lt;td&gt;&lt;asp:textbox id=&quot;txtusernumber&quot; Runat=&quot;server&quot; Width=&quot;50Px&quot; MaxLength=&quot;4&quot;&gt;&lt;/asp:textbo<wbr />x&gt;&lt;/td&gt;<br />
&lt;/tr&gt;
</div>
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I have a textbox in a form where I need to enter the number of users. I need to make sure the person enters a number on that field. How can I validate that field?
code----
<tr>
<td class="NavyBold">Number of Users
<br>
(if multiple users):</td>
<td><asp:textbox id="txtusernumber" Runat="server" Width="50Px" MaxLength="4"></asp:textbox></td>
</tr>

how to validate number insert to a textbox field?

C# is an object-oriented programming language created in conjunction with Microsoft’s .NET framework. Compilation is usually done into the Microsoft Intermediate Language (MSIL), which is then JIT-compiled to native code (and cached) during execution in the Common Language Runtime (CLR).