title: Minimum characters to enter - regex non character issue
body: <p>I use this regex in combination with asp:RequiredFieldValidator to force user to enter minimum 7 characters:</p>
  
  <pre><code>[0-9a-zA-Z]{7,}
  </code></pre>
  
  <p>But when user enter non letter <strong>@, ., -</strong> etc then this doesn't work.
  How to enable to enter all characters and minimum 7</p>