单击h:selectOneMenu调用动作方法 [英] Invoke action method on click of h:selectOneMenu

问题描述

我有以下下拉列表:

<h:selectOneMenu value="#{user.favCoffee3}"  onclick="">
   <f:selectItems value="#{user.favCoffee3Value}" var="c"
   itemLabel="#{c.coffeeLabel}" itemValue="#{c.coffeeValue}" />
</h:selectOneMenu>

我想通过单击下拉列表项来从Bean启动某些方法.我该如何实现?

解决方案

您可以使用valueChangeListener属性，指向托管Bean中的方法，然后在onchange属性中添加submit().

该表单应如下所示:

<h:form>
    <h:selectOneMenu valueChangeListener="#{bean.valueChanged}" 
                     onchange="submit()">
        <f:selectItem itemValue="1" itemLabel="First" />
        <f:selectItem itemValue="2" itemLabel="Second" />
    </h:selectOneMenu>
</h:form>

并且托管bean中的valueChangeListener方法将是:

public void valueChanged(ValueChangeEvent event) {
    //do your stuff
}

I have the following drop down list:

<h:selectOneMenu value="#{user.favCoffee3}"  onclick="">
   <f:selectItems value="#{user.favCoffee3Value}" var="c"
   itemLabel="#{c.coffeeLabel}" itemValue="#{c.coffeeValue}" />
</h:selectOneMenu>

I would like to launch some method from the bean by drop down list item click. How can I achieve it?

解决方案

You can use the valueChangeListener attribute, pointing to a method in the managed-bean and add a submit() in the onchange attribute.

The form should look like :

<h:form>
    <h:selectOneMenu valueChangeListener="#{bean.valueChanged}" 
                     onchange="submit()">
        <f:selectItem itemValue="1" itemLabel="First" />
        <f:selectItem itemValue="2" itemLabel="Second" />
    </h:selectOneMenu>
</h:form>

And the valueChangeListener method in the managed bean would be:

public void valueChanged(ValueChangeEvent event) {
    //do your stuff
}

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