Pass parameter to dialog in the same page

Question

I have a page contains a form and other form nested in a dialog. I need to pass parameter to dialog when button clicked in the main form

<h:form>
<p:dataTable var="form" value="#{myBean.formList}">
     <p:commandButton id="selectProduct" 
                            update="selectProductForm" oncomplete="selectProductDlg.show()" 
                            image="ui-icon-" > 
                            <f:param name="formId" value="#{form.id}" />
                </p:commandButton>
</p:dataTable>
</h:form>

<p:dialog>
...<h:form>
<p:commandButton action="#{myBean.setSelected}"
                    update="main_form"
                    oncomplete="if(#{myBean.errorText == 'SUCCESS'}){ selectProductDlg.hide();}"
                    value="Sec">
                </p:commandButton>

i can not see formId in myBean with code:

if (form == null) {
            HttpServletRequest req = (HttpServletRequest) FacesContext
                    .getCurrentInstance().getExternalContext().getRequest();
            if(req.getParameter("formId") != null) {
                formId = Long.valueOf(req.getParameter("formId"));
            }
            if (formId != null && !"".equals(formId)) {
                form = formService.findById(formId);
            } 
        }

where am i wrong thanks

score 26 · Accepted Answer · answered Jan 12 '12 at 17:20

Assuming that the bean is in the view scope, just set it as a bean property direclty in the action method of the command button in the datatable column.

<h:form>
  <p:dataTable var="form" value="#{myBean.formList}">
    <p:column>
      <p:commandButton id="selectProduct" 
                       action="#{myBean.setCurrentForm(form)}"
                       update="selectProductForm" oncomplete="selectProductDlg.show()" 
                       image="ui-icon-"> 
      </p:commandButton>
    </p:column>
  </p:dataTable>
</h:form>

<p:dialog>
  <h:form>
    <p:commandButton action="#{myBean.setSelected}"
                     update="main_form"
                     oncomplete="if(#{myBean.errorText == 'SUCCESS'}){ selectProductDlg.hide();}"
                     value="Sec">
    </p:commandButton>
  </h:form>
</p:dialog>

If you have a cancel button in the dialog, you need to let its action method set it to null.

There's no need to fiddle around with raw HTTP request parameters in POST requests. The <f:param> should as much as possible be used in GET requests only (e.g. <h:link>, <h:button>, etc).

thanks very much, i used to think i can not pass parameter to action method, now i edited my code and it worked — merveotesi, Jan 13 '12 at 08:50

Pass parameter to dialog in the same page

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