one action method handling multiple command buttons
Hi,
I have a bunch of auto-generated command buttons in a page. I need to call the same (i have only ONE action method) action method and decide which button was clicked. Currently i am using a javascript that sets a hidden parameter based on the button clicked. Then i use this value for further processing in my action method. Can i do the similar operation using jsf without using javascript?
Regards,
Mani
# 1
You could a parameter to your commandButton
<h:commandButton value="Press here" actionListener="#{myBean.action}">
<f:attribute name="attrname1" value="attrvalue1" />
</h:commandButton>
or you can do the following
<h:commandButton id="foobar1" image="images/central.jpg"
actionListener="#{test.listen}"/>
public void listen(ActionEvent event) {
Make a list of commandbutton id
UIComponent comp = event.getComponent();
FacesContext context = FacesContext.getCurrentInstance();
String componentId = comp.getClientId(context);// get the id of the button pressed
loop thorugh the list for the matching button name
Hope this helps
# 2
Hi ferric4 ,Thanks a lot for your suggestion. The first one worked. I tried the 2nd option before itself. Since the buttons are auto generated, i got an error message similar to that we have to use only static text as id.Thanks,Mani
# 3
Hi,
Yesterday i tried with static values in attributes. ie:
<f:attribute name="clicked" value="1" />
I was able to get the values in my listener class.
I want to provide dynamic values to the Action Listener using attributes.
My code is as follows:
<h:dataTable value="#{SampleBean.list}" var="resultObj">
<h:column>
<h:commandButton value="Click here" onclick="javascript:alert('#{resultObj}')"
action="#{SampleBean.action}" actionListener="#{SampleBean.listener}" >
<f:attribute name="clicked" value="#{resultObj}" />
</h:commandButton>
I am getting the alert message with correct values. But in listener (code as follows), im getting null values.
ArrayList<String> list;
public SampleBean() {
System.out.println("Constructor called");
list = new ArrayList<String>();
list.add("1");
list.add("2");
list.add("3");
list.add("4");
}
public void listener(ActionEvent event) {
Iterator iter = event.getComponent().getAttributes().keySet().iterator();
while(iter.hasNext()) {
System.out.println("DEBUG: Value ->" + iter.next());
}
System.out.println("CLICKED : " +
event.getComponent().getAttributes().get("clicked"));
// I am getting null here
}// listener
Any help will be appreciated.
