<div>
This is my validator for my form. what so I place in the ??? bit. the line you placed above?<br />
<br />
&lt;asp:RegularExpressionVali<wbr />dator Runat=&quot;server&quot; Display=&quot;None&quot; ControlToValidate=&quot;uploadF<wbr />ile&quot; ValidationExpression=&quot;????<wbr />&quot; ErrorMessage=&quot;Need correct image format&quot; ID=&quot;Regularexpressionvalid<wbr />ator1&quot; /&gt;<br />
<br />
Thanks
</div>


This is my validator for my form. what so I place in the ??? bit. the line you placed above?

<asp:RegularExpressionValidator Runat="server" Display="None" ControlToValidate="uploadFile" ValidationExpression="????" ErrorMessage="Need correct image format" ID="Regularexpressionvalidator1" />

Thanks

<div>
<div class="content wysiwyg-content">
Hi, <br />
<br />
I need to use a regular expression validator in ASP.NET to check the file extension of a file input html control.<br />
<br />
&lt;input type=&quot;file&quot; &gt;<br />
<br />
I am uploading images to the server and need to check for .jpeg,.jpg,.bmp and .gif.<br />
<br />
Can anyone help?<br />
<br />
Kev
</div>
</div>


Hi, 

I need to use a regular expression validator in ASP.NET to check the file extension of a file input html control.

<input type="file" >

I am uploading images to the server and need to check for .jpeg,.jpg,.bmp and .gif.

Can anyone help?

Kev

regular expression validation for file extensions

The .NET Framework is not specific to any one programming language; rather, it includes a library of functions that allows developers to rapidly build applications. Several supported languages include C#, VB.NET, C++ or ASP.NET.