从页面级别获取属性/参数 [英] Getting properties/parameters from page level

问题描述

我想知道是否可以通过编程方式获取 xpage 或自定义控件的参数和/或属性.

I wonder if I can get the parameters and/or properties of an xpage or custom control programmatically.

<xp:view xmlns:xp="http://www.ibm.com/xsp/core" id="layout">

<xp:this.properties>
    <xp:parameter name="testcc.xsp" value="Test 1"></xp:parameter>
    <xp:parameter name="index.xsp" value="Main"></xp:parameter>
</xp:this.properties>
...

我如何访问此参数列表以使用它，例如在重复控件中?

How can I access this parameter list to use it e.g. in a repeat control?

编辑两位说的都对，谢谢！但这仅适用于页面，不适用于自定义控件.

EDIT You both are right, thank you! But this works only on a page, not in a custom control.

编辑

你们都很棒:-)

但是:我应该修改我的问题:我有一个自定义控件，我在其中定义了属性.在 SAMe 自定义控件中，我想在重复控件中访问这些属性.

BUT: I should revise my question: I have a custom control where I defined the properties. Within the SAMe custom control I want to access these properties in a repeat control.

您的两个答案似乎都假设对这些属性的访问来自视图(页面)级别，对吗?

Both your answers seem to assume that the access to these properties is from the view (page) level, right?

我测试了 Svens 方式 - 如果我从页面级别访问 CC 中的道具，这会起作用.

I tested Svens way - this works if I access the props in the CC from the page level.

编辑

这是CC的代码:

<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core">

<xp:this.properties>
    <xp:parameter name="param" value="val"></xp:parameter>
</xp:this.properties>

<xp:label value="#{javascript:facesContext.getProperty('param')}"
    id="label1">
</xp:label>

</xp:view>

如您所见，我只想访问 CC 本身中的属性，而不是从页面级别访问.

As you can see I just want to access the property within the CC itselt, not from the page level.

推荐答案

您可以通过访问 facesContext 来获取属性:

You can get the properties by accessing facesContext:

facesContext.getProperty("index.xsp")

如果您在自定义控件中设置属性，则属性不会添加到视图根中.它们被设置为自定义控件 (com.ibm.xsp.component.UIIncludeComposite) 的属性.

If you set the properties in a custom control, the properties are not added to the view root. The are set as attributes of the custom control (com.ibm.xsp.component.UIIncludeComposite).

要访问它们，您首先必须给您的 CC 一个 ID:

To access them you first have to give your CC an Id:

<xc:ccProp id="myId" />

这允许您像使用 getComponent() 方法的组件一样访问自定义控件，并检索包含属性的 properties 属性:

This allows you to access the custom control like a component with the getComponent() method and retrieve the attribute properties which contains the properties:

<xp:label id="labelProperty">
    <xp:this.value><![CDATA[#{javascript:
        var cc:com.ibm.xsp.component.UIIncludeComposite = getComponent("myId");
        var arrList:java.util.ArrayList = cc.getAttributes().get("properties");
        arrList.get(0).getName()}]]>
    </xp:this.value>
</xp:label>

编辑 2:

如果您不想给您的 CC 一个 ID，您可以通过这种方式访问​​ CC(在本例中是标签的父级):

You can access the CC (which is the parent of the label in this example) this way if you don't want to give your CC an ID:

自定义控件代码:

<?xml version="1.0" encoding="UTF-8"?>
<xp:view xmlns:xp="http://www.ibm.com/xsp/core">

    <xp:this.properties>
        <xp:parameter name="param" value="val"></xp:parameter>
    </xp:this.properties>

    <xp:label id="label1">
        <xp:this.value><![CDATA[#{javascript:
            this.parent.getAttributes().get("properties").get(0).getName()
       }]]></xp:this.value>
   </xp:label>

    <xp:label id="label2">
        <xp:this.value><![CDATA[#{javascript:
            this.parent.getAttributes().get("properties").get(0).getValue()
       }]]></xp:this.value>
   </xp:label>

</xp:view>

希望这有助于澄清问题.

Hope this helps to clarify the issue.

这篇关于从页面级别获取属性/参数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！