更新selectOneMenu用于如果ohter selectOneMenu用于的设置值（事件不会触发） [英] Update SelectOneMenu if value of ohter SelectOneMenu is set (Event isn't fired)

问题描述

在我的应用程序，我想设置/更新selectOneMenu用于如果另一个selectOneMenu用于设置。我们使用primefaces，所以我检查了primefaces展示，发现正是我一直在寻找。遗憾的是它不工作。该事件不会激发，我不知道为什么。希望你能帮助我。

链接到primefaces的示例展示

- >如果将语言设置，它会自动重新加载列表与问候，但事实并非如此。我要preSS F5重新加载。任何想法？

我的XHTML code

 ＆LT; H：格式ID =addressBasicsForm＆GT;
  ＆LT;电话号码：咆哮的id =咆哮粘=真正的showDetail =真/＆GT;
  ＆LT;电话号码：TabView的ID =TabView的＆GT;
    ＆LT;电话号码：标签ID =stammdaten标题=＃{msg.adr_basics_tabtitle}＆GT;
  ＆LT;表格样式=宽度：100％;＆GT;
        ＆其中; TR＆GT;
          ＆LT; TD风格=宽度：50％;＆GT;
    ＆LT;电话号码：面板可切换=假＆GT;
      ＆LT;表格样式=的margin-top：的3px;宽度：100％;＆GT;
        ＆LT; TR风格=HEIGHT：26px;＆GT;
          ＆LT; TD＆GT;
            ＆LT;电话号码：selectOneMenu用于ID =somLang值=＃AddressBasics_m.languageId}的风格=保证金左：2px的;宽度：90％;＆GT;
              ＆LT; F：selectItems的值=＃{AddressBasics_m.languageItems}/＆GT;
                      ＆LT;电话号码：AJAX更新=somAnrede监听器=＃{AdressBasics_m.handleLanguageChange}/＆GT;
            ＆LT; / P：selectOneMenu用于＆GT;
          ＆LT; / TD＆GT;
        ＆LT; / TR＆GT;
        ＆LT; TR风格=HEIGHT：26px;＆GT;
          ＆LT; TD＆GT;
            ＆LT;电话号码：selectOneMenu用于ID =somAnrede值=＃AddressBasics_m.salutationId}的风格=保证金左：2px的;宽度：90％;＆GT;
              ＆LT; F：selectItems的值=＃{AddressBasics_m.salutationItems}/＆GT;
            ＆LT; / P：selectOneMenu用于＆GT;
          ＆LT; / TD＆GT;
 

我的豆

  @Named（AddressBasics_m）
@ConversationScoped
公共类AddressBasicsView实现Serializable {
私有静态最后长的serialVersionUID = -4034697810438325785L;

公开名单＆LT;的SelectItem＆GT; getSalutationItems（）{
    如果（firstrun）
        languageId = 21L;

    firstrun = FALSE;
    如果（salutationItems == NULL || lastLanguageId！= languageId）{
        salutationItems = addressService.getAllSalutationsByLangId（languageId）;
        setLastLanguageId（languageId）;
    }
    返回salutationItems;
}

公共无效handleLanguageChange（）{
    this.salutationItems = getSalutationItems（）;
}
 

解决方案

我认为这个问题是在你的Ajax调用。 阿贾克斯可能会非常棘手，我会推荐两种不同途径的几点思考：

 ＆LT;电话号码：AJAX渲染=@形式的监听器=＃{AdressBasics_m.handleLanguageChange}/＆GT;
 

或

 ＆LT;电话号码：AJAX更新=：addressBasicsForm：TabView的：stammdaten：somAnrede监听器=＃{AdressBasics_m.handleLanguageChange}/＆GT;
 

In my application I'm trying to set/update a SelectOneMenu if another SelectOneMenu is set. We're using primefaces, so I checked the primefaces showcase and found exactly what I was looking for. Unfortunately it's not working. The Event isn't fired and I don't know why. Hopefully you can help me

Link to the Example of the primefaces showcase

-> If the language is set, it should automatically reload the list with the salutations, but it doesn't. I have to press F5 to reload. Any ideas?

My xhtml code

<h:form id="addressBasicsForm">
  <p:growl id="growl" sticky="true" showDetail="true"/>
  <p:tabView id="tabView">
    <p:tab id="stammdaten" title="#{msg.adr_basics_tabtitle}">
  <table style="width:100%;">
        <tr>
          <td style="width: 50%;">
    <p:panel toggleable="false">
      <table style="margin-top:3px; width:100%;">
        <tr style="height:26px;">
          <td>
            <p:selectOneMenu id="somLang" value="#AddressBasics_m.languageId}" style="margin-left:2px; width:90%;">
              <f:selectItems value="#{AddressBasics_m.languageItems}"/>
                      <p:ajax update="somAnrede" listener="#{AdressBasics_m.handleLanguageChange}"/>
            </p:selectOneMenu>
          </td>
        </tr>
        <tr style="height:26px;">
          <td>
            <p:selectOneMenu id="somAnrede" value="#AddressBasics_m.salutationId}" style="margin-left:2px; width:90%;">
              <f:selectItems value="#{AddressBasics_m.salutationItems}" />
            </p:selectOneMenu>
          </td>

My Bean

@Named("AddressBasics_m")
@ConversationScoped
public class AddressBasicsView implements Serializable{
private static final long serialVersionUID = -4034697810438325785L;

public List<SelectItem> getSalutationItems(){
    if(firstrun)
        languageId = 21L;

    firstrun = false;
    if(salutationItems == null || lastLanguageId != languageId){
        salutationItems = addressService.getAllSalutationsByLangId(languageId);
        setLastLanguageId(languageId);
    }
    return salutationItems;
}

public void handleLanguageChange(){
    this.salutationItems = getSalutationItems();
}

解决方案

I believe that the problem is on your Ajax call. Ajax could be very tricky, I would recommend 2 different approachs:

<p:ajax render="@form" listener="#{AdressBasics_m.handleLanguageChange}"/>

or

<p:ajax update=":addressBasicsForm:tabView:stammdaten:somAnrede" listener="#{AdressBasics_m.handleLanguageChange}"/>

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