title: Regular expression for subnet masking?
body: <p>I am using regular expression for checking the subnet masking. I use ajax txtbox with masking value but that is not working, then I switched to a textbox and applying a regular expression for that. unfortunatly that one is also not working.</p>
  
  <p>Can you help me out to give a RE for subnet masking 255.255.255.255</p>
  
  <p>Or any best way to do that?</p>
  
  <p><strong>Solution</strong>:</p>
  
  <p>I was using masked text box and don't know how to put validation expression.</p>
  
  <p>Finally I found a property of masked text box as validation expression, and there I put the RE and change the property validate to true.</p>
  
  <p>No need to use validator expression explicitly. </p>
  
  <p>Thanks </p>