title: Can I negate the value in an attribute that uses an "Eval"?
body: <p>I'd like to set a button's enabled state to be the negation of a value.</p>
  
  <p>So given this code:</p>
  
  <pre class="lang-xml prettyprint-override"><code>&lt;asp:CheckBox ID="DefaultChecked" 
                Checked='&lt;%# Bind("IsDefaultMessage") %&gt;' 
                Enabled="false" 
                runat="server" /&gt;
  
  &lt;asp:LinkButton ID="MakeDefaultButton" 
                  runat="server" 
                  CommandName="MakeDefault' 
                  CommandArgument='&lt;%# Bind("ResidentialInfoID") %&gt;' 
                  Text="Make Default" /&gt;
  </code></pre>
  
  <p>How can I make the LinkButton <code>Enabled</code> attribute <code>false</code> if <code>IsDefaultMessage == true</code>?</p>