title: RadDatePicker Input Events
body: <p>I was looking for some kind of event that is fired on a RadDatePicker (a telerik control) when text is typed into the control.</p>
  
  <p>It must be fired on every key stroke.</p>
  
  <p>I tried to grab the keyup event, which works fine, but ... if I have typed into the field something like 1/1/201 (which is an incomplete date) the SelectedValueProperty is not set to the incomplete date that I have typed.</p>
  
  <p>So why do I want that? I should explain. When I find that something in the field is changed I want to update the field that the date is bound to (like using UpdateSourceTrigger.PropertyChanged in WPF).</p>
  
  <p>What is in that field (and other fields) will determine whether another button on the page is active or not.</p>
  
  <p>I am guessing that the solution would be the same as a normal DatePicker because what it comes down to is that a RadDatePicker has an internal TextBlock where the date is typed / edited.</p>
  
  <p>Thanks,</p>
  
  <p>Peter.</p>