title: Is it possible to assign Multiple Validation Groups to a single Validation Control?
body: <p>I have a Form like this.</p>
  
  <p>UserID has to be validated when user clicks "Check Availability" and "Submit"<img src="https://i.stack.imgur.com/lK0T4.png" alt="enter image description here"></p>
  
  <p>Hence "UserID" required field validator has to be assigned two grops.</p>
  
  <p>As if now it is assigned only Group1</p>
  
  <pre><code> &lt;asp:RequiredFieldValidator ID="UserIDRequiredFieldValidator" runat="server" ErrorMessage="Enter UserID"
                      ControlToValidate="txtUserID" ValidationGroup="Group1"&gt;&lt;/asp:RequiredFieldValidator&gt;
  </code></pre>
  
  <p>So is it possible to assign "Group1" and "Group2" to UserIDRequiredFieldValidator</p>
  
  <p>I have already gone through
  <a href="https://stackoverflow.com/questions/2509369/how-to-validate-against-multiple-validation-groups">How to validate against Multiple validation groups?</a> 
  which talks about validating Group1 and Group2 when user clicks "Submit" which is a good alternate solution . </p>
  
  <p>Thanks in Advance</p>