Question

我试图通过使用p：ajax来获取h：selectOneMenu中的变化值。但我总是得到空值，不知道下面是什么错误的代码。

<h:form>
<h:selectOneMenu id="selectMenu" value="#{userHomeController.gymsSelectType}">

<f:selectItem itemLabel="Close to me" itemValue="closest" />
<f:selectItem itemLabel="Visited by me" itemValue="visited" />
<p:ajax process="selectMenu" listener="#{userHomeController.selectMenuListener}" event="change" update=":home-form:panel"  />

</h:selectOneMenu>
</h:form>

并且bean类是

 public void selectMenuListener() {
    System.out.println("-------- >> " + gymsSelectType); // here null coming
    if (gymsSelectType.equals("a")) {
        //
    } else {
       //
    }
}

这是一个viewscoped类。以下变量gymsSelectType的setter也打印为null

public void setGymsSelectType(String gymsSelectType) {
     System.out.println("------------ >> "+gymsSelectType);
    this.gymsSelectType = gymsSelectType;
}

Answer 1

试试这个

<p:ajax process="@this" listener="#{userHomeController.selectMenuListener}" event="change" update=":home-form:panel"  />

Answer 2

试试这个

<p:ajax partialSubmit="true" listener="#{userHomeController.selectMenuListener}" event="change" update=":home-form:panel" />

h：用p：ajax选择selectOneMenu更改事件

2 个答案: