使用f:param传递参数时，f:ajax不起作用 [英] f:ajax doesn't work when parameters are passed using f:param

问题描述

点击链接，我正在调用一个方法.以下代码可以正常工作

I am calling a method on the click of link. The following code works ajaxfully

                        <ui:repeat value="#{myBean.names}" var="name"
                               varStatus="idx">
                        <li>
                            <h:commandLink value="#{name.label}">
                                <f:ajax execute="@this" event="click" render="@all" listener="#{myBean.changeActiveName}" >
                                </f:ajax>
                            </h:commandLink>
                        </li>
                    </ui:repeat>

但是当我尝试将参数传递给Ajax调用时，它将开始刷新整个页面

But when I try to pass parameter to the Ajax call it starts refreshing the whole page

                    <ui:repeat value="#{myBean.names}" var="name"
                               varStatus="idx">
                        <li>
                            <h:commandLink value="#{name.label}">
                                <f:ajax execute="@this" event="click" render="@all" listener="#{myBean.changeActiveName}" >
                                    <f:param name="idx" value="#{idx}" />
                                </f:ajax>
                            </h:commandLink>
                        </li>
                    </ui:repeat>

此代码有什么问题?

推荐答案

<f:param>必须是父UICommand组件的子元素，而不是<f:ajax>的子元素.

The <f:param> has to be a child of the parent UICommand component, not of <f:ajax>.

<h:commandLink value="#{name.label}">
    <f:param name="idx" value="#{idx}" />
    <f:ajax listener="#{myBean.changeActiveName}" render="@all" />
</h:commandLink>

(请注意，由于您的定义已经是默认值，因此我删除了execute和event属性；此外，我想知道发送整个IterationStatus实例作为请求参数的用处如何……也许您只是想发送索引呢?或者使用#{idx.index}代替)

(note that I removed the execute and event attributes as your definitions are the defaults already; plus I wonder how it's useful to send a whole IterationStatus instance as request parameter ... maybe you just wanted to send the index instead? Use #{idx.index} instead or so)

• 我如何传递所选内容(尽管它对待<h:dataTable>，但对<ui:repeat>也完全一样)

• How can I pass selected row to commandLink inside dataTable? (although this treats <h:dataTable>, exactly the same answer applies to <ui:repeat> as well)

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