将h:inputText值传递给f:ajax侦听器 [英] Pass h:inputText value to f:ajax listener

问题描述

我正在尝试创建一个可以完全编辑并在单个页面上显示的sql数据表. 我正在使用jsf和一个命名的bean. 我使用arraylist bean对象存储和显示数据.

I am trying to create a sql data table that can be fully edited and displayed on a single page. I am using jsf and a named bean. I use a arraylist bean object to store and display the data.

public List<RegionBean> getRegions()throws SQLException{

数据显示在inputText元素中.当我尝试在后备bean中使用sql方法更新信息时，无法将更新后的文本添加到sql数据库中. 它将简单地输入与原始显示相同的值. 我想做的是让输入文本框显示数组列表中的数据值，然后在对它们进行编辑后将它们存储在bean的另一个字段中.

The data is displayed in an inputText element. When I try to update the information using a sql method in the backing bean it fails to add the updated text to sql data base. It will simply put the same value as was originally displayed. What I want to do is have the input text box display the data values from the array list and then store them in a different field in the bean after they have been edited.

这是我现在的代码.

<h:dataTable value="#{regionBean.regions}" var="regions"/>


<h:column>
    <f:facet name="header">Region ID</f:facet>                       
    #{regions.regionID}
</h:column>
<h:column>
    <f:facet name="header">Region Description</f:facet>
    <h:inputText id="des" value="#{regions.regionDescription}">
    <f:ajax event="change" 
            listener="#{regionBean.updateText(event)}"
            render="des"/>
</h:inputText>
<h:column>
    <f:facet name="header">Save</f:facet>
    <h:commandButton action="#{regionBeanupdate(regions.regionID)}" value="Update">
    </h:commandButton>
</h:column>

我遇到的问题 UIComponent-ClientId =，消息= javax.el.PropertyNotWritableException:

The problem I am having with this UIComponent-ClientId=, Message=javax.el.PropertyNotWritableException:

在豆子中我有

public void updateText(AjaxBehaviorEvent event)
            throws AbortProcessingException { }

如何将新的输入文本框值传递给此方法，以便将其作为String存储在Bean中，从而能够使用它来更新sql数据库.

How can I pass the new input text box value to this method so as I can store it as String in the bean and thus able to use it to update the sql database.

请理解我熟悉sql，并且之前已经构建了多个CRUD应用程序，而我的问题与sql语法或其他方面无关.

Please understand that I am familiar with sql and I have built several CRUD applications before and my question is not related to sql syntax or other wise.

推荐答案

从<f:ajax>中删除listener和render，然后在<h:inputText>中添加valueChangeListener.

Remove listener and render from <f:ajax> then add a valueChangeListener to <h:inputText>.

<h:inputText value="#{regions.regionDescription}" valueChangeListener="#{region.updateText}">
     <f:ajax event="change"/>
</h:inputText>

然后在您的bean中:

Then in your bean:

public void updateText(ValueChangeEvent event){
   input = event.getNewValue().toString();
}

注意:input是用于存储新值的变量.

Note: input is the variable in which the new value is stored.

这篇关于将h:inputText值传递给f:ajax侦听器的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！