Using UpdatePanels inside of a ListView
- by Jim B
Hey everyone,
I'm wondering if anybody has run across something similar to this before. Some quick pseudo-code to get started:
<UpdatePanel>
<ContentTemplate>
<ListView>
<LayoutTemplate>
<UpdatePanel>
<ContentTemplate>
<ItemPlaceholder />
</ContentTemplate>
</UpdatePanel>
</LayoutTemplate>
<ItemTemplate>
Some stuff goes here
</ItemTemplate>
</ListView>
</ContentTemplate>
</UpdatePanel>
The main thing to take away from the above is that I have an update panel which contains a listview; and then each of the listview items is contained in its own update panel.
What I'm trying to do is when one of the ListView update panels triggers a postback, I'd want to also update one of the other ListView item update panels.
A practical implementation would be a quick survey, that has 3 questions. We'd only ask Question #3 if the user answered "Yes" to Question #1. When the page loads; it hides Q3 because it doesn't see "Yes" for Q1. When the user clicks "Yes" to Q1, I want to refresh the Q3 update panel so it now displays.
I've got it working now by refreshing the outer UpdatePanel on postback, but this seems inefficient because I don't need to re-evaluate every item; just the ones that would be affected by the prerequisite i detailed out above.
I've been grappling with setting up triggers, but i keep coming up empty mainly because I can't figure out a way to set up a trigger for the updatepanel for Q3 based off of the postback triggered by Q1.
Any suggestions out there? Am I barking up the wrong tree?
