重新渲染rich:dataTable的特定行 [英] reRender a specific row of rich:dataTable

问题描述

早上好！

是否可以仅重新渲染rich:dataTable的1个特定行?

我有一个rich:dataTable，当我确定只有1行发生更改时，我只需要重新行此行，而不是整个表.是否有可能?怎么样?

I have a rich:dataTable and, when I do something that I´m sure only 1 row has changed, I need to reRednder only this row, not the entire table. Is it possible? How?

XHTML:

<rich:dataTable id="myTable"  value="#{bean.table}" var="me">
    <rich:column>
        <h:outputText value="#{me.id}" />
    </rich:column>
    <rich:column>
        <h:outputText value="#{me.valueOne}" />
    </rich:column>
    <rich:column>
        <h:outputText value="#{me.valueTwo}" />
    </rich:column>
</rich:dataTable>

<some:tag.... reRender="??????" action="bean.example" />

Java:
public void example{
   // Do something that affects to the row selected
}

非常感谢.

推荐答案

是的，有可能.您必须指定以下内容:

Yes , it is possible . You have to specify the followings things:

• 哪些列将通过可以调用MBean方法的标记的reRender属性呈现
• 要通过rich:dataTable的ajaxKeys属性呈现哪些行.

• Which columns to be rendered via the reRender attribute of the tags that can invoke MBean method
• What rows to be rendered via the ajaxKeys attribute of the rich:dataTable .

ajaxKeys属性绑定到Set <Integer>对象，该对象保存要更新的行号.

The ajaxKeys attribute is bound to Set <Integer> Object which holds the row numbers to be updated.

例如，假设您要使用a4j:commandButton调用Mbean方法，并希望在操作完成后呈现特定的行和列.您可以使用以下内容:

For example , suppose you want to invoke a Mbean method using a4j:commandButton and want to render a particular row and column after the action finishes . You can use the following :

<a4j:commandButton action="#{bean.someAction}"  reRender="columnID,columnID2">
    <f:setPropertyActionListener value="#{idx}" target="#{bean.selectedRow}" />
</a4j:commandButton>

 <rich:dataTable id="myTable"  value="#{bean.table}" var="me" ajaxKeys="#{bean.rowsToUpdate}" rowKeyVar="idx">
        <rich:column id="columnID">
            <h:outputText value="#{me.id}" />
        </rich:column>
        <rich:column id="columnID2">
            <h:outputText value="#{me.valueOne}" />
        </rich:column>
        <rich:column>
            <h:outputText value="#{me.valueTwo}" />
        </rich:column>
    </rich:dataTable>

在bean.someAction()内，将要更新的行号添加到rowsToUpdate整数集:

Inside the bean.someAction() , you add the row number that you want to update to the rowsToUpdate integer set:

HashSet<Integer> rows = new HashSet<Integer>();
rows.add(selectedRow);
setRowsToUpdate( rows );

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