Question

I have a radiobuttonlist that lives on a user control. This user control lives in a repeater on a parent user control, and that user control lives on a page with a submit button.

So something like this:

<page>
<UserControl1>
  <Repeater>
    <UserControl2>
      <radiobuttonlist>
    </UserControl2>
  </Repeater>
</UserControl1>
<Submit button />
</page>

The radiobuttonlist is dynamically populated in the code-behind of UserControl2. The problem is that when I submit the form, I need to access the SelectedValue of the radiobuttonlist, and that value is always empty. Even if I first fire the methods that populate the radiobuttonlist, the selectedvalue of the RBL is empty. I have a SelectedIndexChanged event handler on the RBL, but it never fires.

What do I need to do to be able to get the SelectedValue of the radiobuttonlist when I cause the parent page to postback?

Answer 1

I got it working. I guess it was an order of operations issue. The fix was to dynamically declare the event handler of the radiobuttonlist in the OnInit() of UserControl2.

protected override void OnInit(EventArgs e) 
{ 
    base.OnInit(e);
    rblOptions.SelectedIndexChanged += new EventHandler(ctrlOptions_SelectedIndexChanged);
} 

Once I did that, the event started firing, even though I was re-instantiating the UserControl on postback. Since the event was firing, I was able to obtain the Selected Index without needing to keep it in ViewState.