Determining if list is empty using render tags

[bobbykjack]

Hi there,

I have a tempate, containing a list, which is reused by a few pages.
Within that template, I wish to hide certain contents if there are no
items in the list. Since I can't just wrap the contents in a standard
RedDot conditional block, I need to use render tags.

I'm using the method discussed previously on this group: looping
through the list and examining the result of the counter:

<reddot:cms>
<foreach itemname="item"
object="Context:CurrentPage.Elements.GetElement(lst_events).Value"
countername="counter">
<htmltext>Store:item[Int32:counter]</htmltext>
</foreach>
</reddot:cms>

There are <%!! Store:counter !!%> (+ 1) items.

However, if there are no items in the list at all, and the foreach
effectively doesn't execute, the counter appears to take its value
from the previous execution! I.e. if I switch between pages, my page
with an empty list uses the value of the previous non-empty list.

Is there a way around this? Make 'Store' local to each page view, for
example?

Regards,

- Bobby

[Mark Radford]

I'd try the following:

<%!! Context:CurrentPage.Elements.GetElement(lst_events).Value.Count !!
%>

I've used that for a container and it returns the number of items in
the container.

Hopefully that's helpful?

Mark

[bobbykjack]

Brilliant. I could have sworn I tried that, but I guess I probably
left the ".Value" out - grrr....

Thanks,

- Bobby

[Mark Radford]

No problem. Glad it worked :)

Mark

[RedDotExpert]

I would recommend no using rendertag to loop a list due to the famous
rendertag cache issue.

I would recommend a combination of using list blockmarks to loop the
list, pull placeholder through and use rendertag if else conditionals.

[Niket Goel]

You can also use the <conditonal> blockmarks for same.

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