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POPrimefaces Datatable doesnt update selected rows
 

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    <p>I have a simple problem. I have a Primefaces Datatable. When the user clicks on a row, I would like the selected rows property in the backing bean to be updated. This can be achieved if the form that the Datatable is in is submitted, but I would like it to happen asynchronously. Ive read the various questions on here about this question, but still have not been able to find a solution.</p> <p>Here is a small example to demonstrate the issue :</p> <p>Test JSF Page:</p> <pre><code>&lt;?xml version='1.0' encoding='UTF-8' ?&gt; &lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"&gt; &lt;html xmlns="http://www.w3.org/1999/xhtml" xmlns:h="http://java.sun.com/jsf/html" xmlns:p="http://primefaces.org/ui"&gt; &lt;h:head&gt; &lt;title&gt;Facelet Title&lt;/title&gt; &lt;/h:head&gt; &lt;h:body&gt; &lt;p:dataTable var="v" value="#{test.values}" selectionMode="multiple" selection="#{test.selectedValue}" rowKey="#{v.value}" &gt; &lt;p:column headerText="Test"&gt; &lt;h:outputText value="#{v.value}" /&gt; &lt;/p:column&gt; &lt;/p:dataTable&gt; &lt;/h:body&gt; </code></pre> <p></p> <p>Backing Bean:</p> <pre><code>import java.util.ArrayList; import java.util.List; import javax.faces.bean.ManagedBean; import javax.faces.bean.ViewScoped; import org.primefaces.component.menuitem.MenuItem; import org.primefaces.component.stack.Stack; @ManagedBean @ViewScoped public class Test { private Value[] selectedValues; public List&lt;Value&gt; getValues() { List&lt;Value&gt; retVal = new ArrayList&lt;Value&gt;(); retVal.add(new Value("a")); retVal.add(new Value("b")); return retVal; } public Value[] getSelectedValues() { return selectedValues; } public void setSelectedValues(Value[] selectedValues) { this.selectedValues = selectedValues; } } </code></pre> <p>And a simple POJO that they use:</p> <pre><code>public class Value { private String value; public Value(String value) { this.value = value; } public String getValue() { return value; } public void setValue(String value) { this.value = value; } } </code></pre> <p>As per the responses, I have update the Datatable like so:</p> <pre><code> &lt;p:dataTable id="dt" var="v" value="#{test.values}" selectionMode="multiple" selection="#{test.selectedValues}" rowKey="#{v.value}" &gt; &lt;p:column headerText="Test"&gt; &lt;h:outputText value="#{v.value}" /&gt; &lt;/p:column&gt; &lt;p:ajax event="rowSelect"/&gt; &lt;p:ajax event="rowUnselect" /&gt; &lt;/p:dataTable&gt; </code></pre> <p>This however still fails to call the setter setSelectedValues(); I made them also say:</p> <pre><code> &lt;p:ajax event="rowSelect" update="@this" /&gt; &lt;p:ajax event="rowUnselect" update="@this" /&gt; </code></pre> <p>And this only called the getter when a row was clicked. Any ideas?</p>
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    1. COYou mean, you want to set the selected row *immediately* once the user clicks on the row? Why exactly not just later on during performing the desired action on those rows? (as would happen by default)
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    2. COYes thats correct. The reason, I am taking this approach is I have a PrimeFaces Stack menu. When the user clicks on one of the MenuItems, a ActionListener is fired. When I try to access the selected rows from the ActionListener, they havent been set yet. Now I suppose what you are purposing would be possible if it possible to submit the form from the MenuItem.
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    3. COAh well... I'll post an answer anyway.
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