PrimeFaces datatable scrollbar position - jsf-2

Question

How to set a scrollbar position of primefaces datatable from last to first?
Actually, I want see the information from bottom to top. Below is my code:
<p:dataTable var="c" value="#{MessagingUserBean.inboxDetails1}" scrollable="true" scrollHeight="517" liveScroll="true" emptyMessage="No Message Found" scrollRows="8" scrollWidth="815" >

Answer 1

Well you can try to not use a liveScroll because you then don't know the end of dataList. Try this and maybe this suit your needs. This will scrolldown to the bottom of your dataTable with a delay.
<h:form prependId="false">
<p:dataTable id="dataTable" var="c" value="#{MessagingUserBean.inboxDetails1}" scrollHeight="517" liveScroll="true" emptyMessage="No Message Found" scrollWidth="815" >
//Your dataTable stuff
</p:dataTable>
</h:form>
<script>
//Get the scrollheight
var s = jQuery('#dataTable .ui-datatable-scrollable-body').prop('scrollHeight');
//Get total size of datatable
var o = jQuery('#dataTable .ui-datatable-scrollable-body').prop('offsetHeight');
//calculate how many times it can scrolldown to set your timer
var t = Math.ceil(s/o);
//Excute scrolldown animation (max scrolldown is scrollHeight - offsetHeight)
$('#dataTable .ui-datatable-scrollable-body').animate({scrollTop:s-0}, t*1000);
</script>

Answer 2

You will need some javascript to do this.
var $scrollable = $(dataTableSelector).children('.ui-datatable-scrollable-body')[0];
$scrollable.scrollTop = $scrollable.scrollHeight;
Where "dataTableSelector" is a selector for your primefaces table (a styleClass for example).
Of course, this assume that the last element in the list you're displaying is actually the first you want to show.