Question

我的复选框组件包含@media screen { /* for screen option*/ p { font-family: verdana, sans-serif; font-size: 17px; } }和p { font-family: georgia, serif; font-size: 14px; color: blue; } }。

$engineers = [];
// process data
while ($row = mysql_fetch_assoc($res)) {
     if (!isset($engineers[$row['username']])) {
         $engineers[$row['username']] = [
              'name'      => $row['name'],
              'locations' => [],
         ];
     }
     $engineers[$row['username']]['locations'][] = [
     $xml->writeAttribute('fieldLoc', $row['location']);
       'vistiDate' => $row['vdate'],
       'retDate'   => $row['rdate']);
     ];
}
// generate xml

foreach ($engineers as $engineer) {
     // add engineer info to xml
     foreach ($engineer['locations'] as $location) {
          // add location to xml
     }
}

我尝试在侦听器方法中获取<f:attribute> <p:ajax listener>值，如下所示：

<h:selectManyCheckbox ...>
  <p:ajax listener="#{locationHandler.setChangedSOI}" />
  <f:attribute name="Dummy" value="test" />
  ...
</h:selectManyCheckbox>

然而，它打印<f:attribute>。我怎么能得到它？

Answer 1

组件属性不作为HTTP请求参数传递。组件属性设置为..呃，组件属性。即它们存储在UIComponent#getAttributes()中。你可以通过那张地图抓住它们。

现在正确的问题显然是如何在ajax监听器方法中获得所需的UIComponent。有两种方法：

指定AjaxBehaviorEvent参数。它为此目的提供了getComponent()方法。

public void setChangedSOI(AjaxBehaviorEvent event) {
    UIComponent component = event.getComponent();
    String dummy = component.getAttributes().get("Dummy");
    // ...
}

使用UIComponent#getCurrentComponent()辅助方法。

public void setChangedSOI() {
    UIComponent component = UIComponent.getCurrentComponent(FacesContext.getCurrentInstance());
    String dummy = component.getAttributes().get("Dummy");
    // ...
}

如何在<p：ajax listener =“”>方法中获取<f：attribute>值？

1 个答案: