如何从数据表更新面板 [英] How to update panel from datatable

问题描述

带有id("myButtonId2")的Commandbutton可以正常工作.我的意思是它更新了"myOutputPanel"，但数据表中的命令按钮没有更新outputPanel.数据表是否有特定的更新样式?

Commandbutton with id("myButtonId2") works fine. I mean it updates "myOutputPanel" but commandbutton which is inside datatable doesn't update outputPanel. Is there a specific update style for datatables?

<h:form id="myForm" prependId="false">
  <p:panel id="myPanel">
     <p:dataTable id="myDatatable">
        <p:column style="width:4%">  
          <p:commandButton id="myButtonId" update="myOutputPanel"/>
        </p:column>
     </p:dataTable>
     <p:commandButton id="myButtonId2" update="myOutputPanel"/>
    </p:panel>

 <p:outputPanel id="myOutputPanel">
  //some stuff
 </p:outputPanel>

推荐答案

这是因为使用process和update时，它们的作用方式与f:ajax组件属性execute和render几乎相同.如果它们位于同一NamingContainer中，则只能直接引用其ID.

This is because with process and update they work much the same way as the f:ajax component attributes execute and render do. One can only reference the id of a component directly if they reside within the same NamingContainer.

默认情况下，clientID是通过在前缀由:分隔的命名容器ID之前添加前缀而生成的.尽管h:form和p:dataTable确实实现了NamingContainer，但p:panel组件未实现NamingContainer.

The clientID is generated by prefixing the naming container ids seperated by : by default. The p:panel component does not implement NamingContainer although h:form and p:dataTable do implement NamingContainer.

myOutputPanel的clientID如下:

The clientID of myOutputPanel is as follows:

myForm:myOutputPanel

第二个按钮之所以起作用，是因为它位于dataTable的外部，并且相对于myOutputPanel在相同的NamingContainer中，该形式为表格.要在process或update中引用绝对的clientID，可以在clientID前面加上:符号.

The second button works because it is outside of the dataTable and relative to myOutputPanel in the same NamingContainer which is the form. To reference the absolute clientID in process or update one can prefix the clientID with the : symbol.

尝试将第一个commandButton的update属性更改为:

Try changing the update attribute of the first commandButton to:

:myForm:myOutputPanel

这应该允许它绝对引用其生成的clientID和工作.

This should allow it absolutely reference its generated clientID and work.

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