CODEWITHSUNDEEP
richfaces
Tsung Lin Tsai
Tsung Lin Tsai

Reputation: 661

Best way to pass value into backing bean in Richfaces

I have a table and use actionListener to perform delete action see following image. right now i am using event.getComponets() to get value that set from f:param tag. however, in this way, i have to hard code component id in to backing bean. looks like not a good approach. it there a better way to passing value from UI when there is a list of action buttons in table. 

    final UIParameter parm = (UIParameter) event.getComponent().findComponent(EDIT_SITE_ID_PARM);
    return (Integer)parm.getValue();

enter image description here

enter image description here

Upvotes: 0

Views: 4794

Answers (3)

Tsung Lin Tsai
Tsung Lin Tsai

Reputation: 661

Christian helped find a way by using actionparam. i have put code in following

<a4j:commandButton value="delete" >
<a4j:support event="onclick" reRender="reviewArea">
    <a4j:actionparam name="setViewMode" assignTo="#{backingBean.selectTmpId}" value="#{item.id}" actionListener="#{backingBean.viewMsgContent}" />
</a4j:support>

Upvotes: 0

Max Katz
Max Katz

Reputation: 1582

You can use a4j:actionParam name=".." value="..", it works just like f:param but will also do the assignment to bean property automatically. Another option is to use f:setPropertyActionListener.

Upvotes: 1

Cristian Boariu
Cristian Boariu

Reputation: 9621

Your action listener should be like this:

public void deleteActionListener(ActionEvent event) {
        final String param = (String) FacesContext
                .getCurrentInstance().getExternalContext()
                .getRequestParameterMap().get("deleteIdParam");
                //convert to int and call your delete method
}

so you only hardcode the parameter's name ant not the component's id.

Of course, now your actionListener will be deleteActionListener instead of your old one.

Upvotes: 0

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