how to create dynamic count of columns in a datatable

[kazoo]

I wonder how to create a dynamic count of columns in a table.
Is there something equivalent in Richfaces like Tomahawk's t:columns.

[ilya_shaikovsky]

Try to use nested a4j:repeats.

[kazoo]

I will try that. Do you have any sample code ?

[kazoo]

I tried the following, it won't display anything.

<rich:dataTable ..>
 <f:facet name="header">
 <rich:columnGroup>
 <a4j:repeat value="#{aList}" var="aVendor">
 <h:column>
 <h:outputText value="#{aVendor.name}"/>
 </h:column>
 </a4j:repeat>

[sergeysmirnov]

if you use facelets, you can try forEach.
Your attempt is similar to the one mentioned in another post. See my explanation there why it would not work.
http://jboss.com/index.html?module=bb&op=viewtopic&t=106113

[-arthur-]

If you're using myfaces give "t:columns" a try. For me its working good.
In correlation you should take a look on the javax.faces.model.DataModel Datastructure.

Here's my jsf code I'm using:

 <t:dataTable value="#{absencePage.calendar.dataModelDates}" var="date"
 styleClass="holidaytable">
 <t:column>
 <f:facet name="header">
 <h:outputText value="Date" />
 </f:facet>
 <h:outputText value="#{date}" styleClass="datecell">
 <f:convertDateTime dateStyle="short" timeZone="CET" />
 </h:outputText>
 </t:column>
 <t:columns value="#{absencePage.calendar.dataModelHeaders}"
 var="column">
 <f:facet name="header">
 <h:panelGrid columns="1">
 <h:outputText value="#{column.fullName}" styleClass="employees" />
 </h:panelGrid>
 </f:facet>
 <h:outputText styleClass="#{absencePage.calendar.element.cssKey}"
 value=" " />
 </t:columns>
 </t:dataTable>

[kazoo]

I tried the c:foreach tag in richtable and richColumnGroup, it works well for fancy headers. The problem is the data binding. When it binds, it will iterate correct number of times of the loop, but only bind the data from the first column of the loop.

Ex. I have 3 vendors to loop through, it loops 3 times, but only binds the data with the 1st vendor.

<c:forEach var="pricing" items="#{vendorPricing.compareVendors}"
begin="0" step="1">
<rich:column>
<h:inputText value="#{pricing.formula}"/>
</rich:column>
<rich:column>
<h:inputText value="#{pricing.cost}"/>
</rich:column>
<rich:column>
<h:inputText value="#{pricing.extendedCost}" />
</rich:column>
</c:forEach>