问题描述
我无法在包含的.zul页面中按ID访问组件。我有一个带控制器的main.zul，我需要通过java控制器类在包含的zul页面中获取一个组件，但它返回null。
I can't reach component by id in the included .zul page. I have one main.zul with a controller and I need to get a component in included zul page through the java controller class, but it returns null.
我知道包括方法创建新的id空间，但有没有办法获得这个组件？
I know the included method creates new id space but is there any way to get this component?
更新
这是我的代码：
主要页面
<?page title="DealerVizard.zul"?>
<?page id="main" ?>
<?taglib uri="http://www.zkoss.org/dsp/web/core" prefix="c"?>
<?init class="org.zkoss.zkplus.databind.AnnotateDataBinderInit" arg0="./Dealer" ?>
<zk>
<style src="/resources/css/default.css" />
<window id="Dealer" class="index"
apply="com.i2i.prm.controller.IndexController">
<div class="content" width="100%">
<tabbox id="tb" forward="onSelect=onSelect">
<tabs id="tabs">
<tab id="info" label="INFO" />
<tab id="create" label="CREATE" />
<tab id="edit" label="EDIT" />
<tab id="test" label="TEST PANEL(LIST BOX)" />
</tabs>
<tabpanels>
<tabpanel id="DealerInfo">
<include id="DealerInfoContent"
src="View/Dealer/DealerInfo.zul" />
</tabpanel>
<tabpanel id="DealerCreate">
<include id="DealerCreateContent"
src="View/Dealer/DealerCreate.zul" />
</tabpanel>
<tabpanel id="DealerEdit">
<include id="DealerEditContent"
src="View/Dealer/DealerEdit.zul" />
</tabpanel>
<tabpanel id="PagingListBox">
<include id="PagingListBoxContent" // Included here
src="View/TEST/PagingListBox.zul" />
</tabpanel>
</tabpanels>
</tabbox>
</div>
</window>
</zk>
PagingListBox.zul（包含页面）
PagingListBox.zul (Included page)
<?page id="list" ?>
<zk>
<grid width="100%">
<columns>
<column label="" />
</columns>
<rows>
<row>
<listbox id="listModel" width="100%" height="100%"
visible="true" span="true" pagingPosition="top" rows="20"
selectedItem="@{DealerController.selected}"
model="@{DealerController.userList}"
forward="onSelect=//main/Dealer.onSelect">
<auxhead>
<auxheader colspan="1">
<textbox
value="@{DealerController.searchUser.name}" maxlength="9"
id="searchCO_ID" forward="onChanging=//main/Dealer.onSearch"
width="100%">
</textbox>
</auxheader>
<auxheader colspan="1">
<textbox
value="@{DealerController.searchUser.surname}" maxlength="21"
id="searchMSISDN" forward="onChanging=//main/Dealer.onSearch"
width="100%">
</textbox>
</auxheader>
<auxheader colspan="1">
</auxheader>
</auxhead>
<listhead>
<listheader label="Name"
sort="auto(UPPER(name))" />
<listheader label="Surname"
sort="auto(UPPER(surname))" />
<listheader label="Delete ?" />
</listhead>
<listitem self="@{each=USERLIST}">
<listcell>
<label value="@{USERLIST.user.name}" />
<textbox
value="@{DealerController.tmpUser.name}" visible="false" />
</listcell>
<listcell>
<label value="@{USERLIST.user.surname}" />
<textbox
value="@{DealerController.tmpUser.surname}" visible="false" />
</listcell>
<listcell>
<button label="Update"
forward="onClick=//main/Dealer.onUpdate" visible="false" />
<button image="icons/edit-delete.png"
label="Delete" forward="onClick=//main/Dealer.onDelete"
width="100%" disabled="true" />
<button label="Save"
forward="onClick=//main/Dealer.onSave" visible="false" />
<button label="Cancel"
forward="onClick=//main/Dealer.onCancel" visible="false" />
</listcell>
</listitem>
</listbox>
<paging id="pagingData" pageSize="20" />
</row>
</rows>
</grid>
</zk>
IndexCOntroller.java
IndexCOntroller.java
public class IndexController extends GenericForwardComposer {
private List<User> userList = new ArrayList<User>() ;
AnnotateDataBinder binder;
Tabbox tb;
Window Dealer;
private int pageCount=0;
@Override
public void doAfterCompose(Component comp) throws Exception {
// TODO Auto-generated method stub
super.doAfterCompose(comp);
comp.setVariable(comp.getId() + "Controller", this, true);
binder = (AnnotateDataBinder) Dealer.getVariable("binder", true);
System.out.println(Path.getComponent("//list/listModel"));
}
public IndexController() {
// TODO Auto-generated constructor stub
}
}
推荐答案
通常我不建议使用 Path.getComponent（ ）当您的应用程序代码与视图页面中的组件结构紧密结合时，访问其他组件的方式。
在你的情况下，你最简单的方法是使用方法，例如。
Normally I wouldn't recommend using Path.getComponent() way to access other components as your application code becomes tightly coupled with your component structure in your view page.In your case you simplest way is to use AbstractComponent#getFellow(String compId) method so for eg.
Include inc = (Include) Dealer.getFellow("PagingListBoxContent");
Listbox listModel = (Listbox) inc.getFellow("listModel");
System.out.println(listModel);
所以将来即使你在列表框之前在ZUML页面中插入任何其他组件，你的代码仍然会工作。
So in future even if you insert any other component in your ZUML page before your listbox your code will still work.
更新：BTW有一个有趣的最近在ZK博客上讨论这个话题
UPDATE: BTW there was an interesting blogpost on this very topic on ZK blog recently
这篇关于Zk如何通过id到达包含的.zul页面组件？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！