title: How do I get the following regular expression to not allow blank e-mails?
body: <p>I am using the following regular expression to validate e-mails, but it allows empty strings as well, how can I change it to prevent it:</p>
  
  <pre><code>^[\w\.\-]+@[a-zA-Z0-9\-]+(\.[a-zA-Z0-9\-]{1,})*(\.[a-zA-Z]{2,3}){1,2}$
  </code></pre>
  
  <p>I am using an asp:RegularExpressionValidator.  My other option is to add on a asp:RequiredFieldValidator, but I am curious if this is possible to check for blanks in my RegularExpressionValidator, so I don't have to have 2</p>