Conditional loading in repeater

Question

in my repeater i have to load 2 out of 4 different images depends on some conditions.

here is 4 images

if (<%# DataBinder.Eval(Container.DataItem, "Voted") %> == "true") 'load these 2 images
    <img style="cursor: pointer" onclick="Dostuff"
         id='<%# DataBinder.Eval(Container.DataItem, "Uid") %>'
         src="../../Images/badge-circle-plus-24-ns.png" />
    <img style="cursor: pointer" onclick="Dostuff"
         id='<%# DataBinder.Eval(Container.DataItem, "Uid") %>'
         src="../../Images/arrow-down-24-ns.png" />
else 'load these 2 
    <img style="cursor: pointer" onclick="Dostuff" 
         id='<%# DataBinder.Eval(Container.DataItem, "Uid") %>'
         src="../../Images/arrow-up-24-ns.png"  />
    <img style="cursor: pointer" onclick="Dostuff"
         id='<%# DataBinder.Eval(Container.DataItem, "Uid") %>'
         src="../../Images/arrow-down-24-ns.png"  />

How do i get around this problem?

When i use such if expression i am endning up with : Container does not exsists in the current context — Timsen, Dec 31 '12 at 14:25
http://stackoverflow.com/questions/9289917/eval-if-statement-in-repeater — Pleun, Dec 31 '12 at 14:28
@Timsen: You can format text as code in your post by indenting it by at least four spaces. — Olivier Jacot-Descombes, Dec 31 '12 at 14:30
you would be better using the `ItemDataBound` event (http://msdn.microsoft.com/en-us/library/system.web.ui.webcontrols.repeater.itemdatabound.aspx) - all your code will be in the code-behind and their should be no issues with container not existing. — Darren Wainwright, Dec 31 '12 at 14:35
See also: http://stackoverflow.com/a/829015/880990, [INFO: ASP.NET Code-Behind Model Overview](http://support.microsoft.com/kb/303247) — Olivier Jacot-Descombes, Dec 31 '12 at 14:50
Found my answer here after quite a lot of searching : http://forums.asp.net/t/1766065.aspx/1 the last answer — Timsen, Dec 31 '12 at 15:47

score 2 · Accepted Answer · answered Dec 31 '12 at 16:27

You can; see this for more information. Essentially, you should format it as:

<% if (DataBinder.Eval(Container.DataItem, "Voted")  == "true") {  %>
    <img style="cursor: pointer" onclick="Dostuff"
         id='<%# DataBinder.Eval(Container.DataItem, "Uid") %>'
         src="../../Images/badge-circle-plus-24-ns.png" />
    <img style="cursor: pointer" onclick="Dostuff"
         id='<%# DataBinder.Eval(Container.DataItem, "Uid") %>'
         src="../../Images/arrow-down-24-ns.png" />
<% } else { %>
    <img style="cursor: pointer" onclick="Dostuff" 
         id='<%# DataBinder.Eval(Container.DataItem, "Uid") %>'
         src="../../Images/arrow-up-24-ns.png"  />
    <img style="cursor: pointer" onclick="Dostuff"
         id='<%# DataBinder.Eval(Container.DataItem, "Uid") %>'
         src="../../Images/arrow-down-24-ns.png"  />
<% } %>

I'm not sure if that's completely supported, so you could also consider trying:

<img style="cursor: pointer" onclick="Dostuff"
         id='<%# DataBinder.Eval(Container.DataItem, "Uid") %>'
         src='../../Images/<%# DataBinder.Eval(Container.DataItem, "Voted")  == "true" ? "badge-circle-plus-24-ns.png" : "arrow-up-24-ns.png" %>' />
  .
  .

The latter uses a conditional and renders the appropriate image depending on the condition.

Conditional loading in repeater

1 Answers1