关于datatable的复选框 [英] About a checkbox on datatable

问题描述

我想在datatable上使用复选框：

I want to use checkbox on datatable like that :

 <h:selectBooleanCheckbox styleClass="selectBooleanCheckbox" valueChangeListener="#{CompletedInventoriesBean.changeUID}" value="#{CompletedInventoriesBean.isChecked(userinventorieswithuser.id)}" id="chkUser">
           <f:ajax event="change" process="chkUser"></f:ajax>
</h:selectBooleanCheckbox>

我的用户名在会话中。而且我想要用户点击复选框，我在会话中添加或删除该ID。

My uids are on the Session. And I want to user that clicks checkbox and I am adding or removing that ids on the session.

没有问题，我可以处理bean上的值。

There is no problem, I could handle the values on the session an beans.

但是点击复选框时，我会收到以下JavaScript提示：

But during the click on the checkboxes, I get JavaScript alert like below:

serverError：class javax.faces.component.UpdateModelExcepton / sections / completed.xhtml @ 29,244
value =＃{CompletedInventoriesBean.isChecked（userinventorieswithuser.id）}：
Property'isChecked'not found on类型main.com.brad.services.CompletedInventoriesBean

serverError: class javax.faces.component.UpdateModelExcepton/sections/completed.xhtml @29,244 value="#{CompletedInventoriesBean.isChecked(userinventorieswithuser.id)}": Property 'isChecked' not found on type main.com.brad.services.CompletedInventoriesBean

我的isChecked方法像这样：

my isChecked method like that :

public boolean isChecked(int z) {
    boolean exist = false;
    for(int i=0; i < selectedSessionUI.getSessionInventories().size(); i++) {
        if (selectedSessionUI.getSessionInventories().get(i) == z) exist = true;
    }
    return exist;
}

为什么我得到这个警报？

Why I get this alert? This is the only think that I stucked in that page.

提前感谢

推荐答案

您不能将值属性绑定到接受参数的方法中。它应该绑定到一个由纯粹的getter和setter表示的属性。

You can't bind the value attribute to a method taking arguments. It should be bound to a property which is represented by a pure getter and setter.

在这种特殊情况下，您更希望使用

In this particular case, you'd rather like to use a Map<Long, Boolean> instead.

private Map<Long, Boolean> checked = new HashMap<Long, Boolean>();

@PostConstruct
public void init() {
    for (int id : selectedSessionUI.getSessionInventories()) {
        checked.put(Long.valueOf(id), true);
    }
}

public Map<Long, Boolean> getChecked() {
    return checked;
}

与

<h:selectBooleanCheckbox value="#{CompletedInventoriesBean.checked[userinventorieswithuser.id]}">

要收集所有已检查的行，只需循环选择

To collect all checked rows, just loop through checked map in the action method.

（不需要setter，因为 [] 将使用 put（）和 get（） on Map 本身） / em>

(no setter is required since [] will use put() and get() on Map itself)

这篇关于关于datatable的复选框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！