Question

I am getting the following error when I click the commandbutton in the datatable which appears in each row. By looking at the example I understand that once commandbutton is clicked, the follwoing code first gets executed

 <f:setPropertyActionListener value="#{detailRow}" target="#{tableBeanDetail.selectedEntry}" />  

and then the code associated with the following bean method

  <p:commandButton id="detailsButton" actionListener="#{tableBeanDetail.onRowSelect}" icon="ui-icon-
      search" title="View Details">  

where in my onRowSelect i am trying to do the following:

  public String onRowSelect(ActionEvent event) throws Exception {


    // Get key fields from row data and set the parameters that needs to be passed w
             .....
 }

I get the following error:

Answer 1

The actionListener methods should have the following signature:

public void someMethodName(ActionEvent event) {
    // ...
}

where ActionEvent is of javax.faces.event package (and thus not java.awt package!).

You’re however returning a String and it’s not clear if your ActionEvent is of the right package. But you seem want to perform a navigation. You should be using action instead of actionListener and remove that ActionEvent argument.

public String onRowSelect() {
    // ...
}

See also:

• commandButton/commandLink/ajax action/listener method not invoked or input value not updated
• Differences between action and actionListener