我在对话框中有一个数据表。
当用户点击<h:form>
<h:dataTable value="#{messageBean.messagesList}" var="msg">
<h:column>
<f:facet name="header">Detail</f:facet>
<p:commandLink action="#{messageBean.fetchSelectedMessage(msg.msgId)}" value="#{msg.summary}" />
</h:column>
</h:dataTable>
</h:form>
链接时，应显示带有数据表的对话框。
以下是代码：
messageBean.fetchSelectedMessag(...)这是@ManagedBean
@SessionScoped
public class MessageBean {
...
private List<Messages> messagesList;
private List<Messages> selectedMessage;
public void fetchSelectedMessage(String msgId) {
String sql = "SELECT * FROM messages WHERE msgId=?";
selectedMessage = jdbcTemplate.query(sql, new Object[]{msgId}, new BeanPropertyRowMapper<Messages>(Messages.class));
System.out.println("fetched selected message== " + selectedMessage); //correct
//open dialog sucucessfully
RequestContext context = RequestContext.getCurrentInstance();
context.execute("PF('dlg1').show();");
}
//getter/setters
：
<p:dialog widgetVar="dlg1" modal="true" height="100">
<p:dataTable var="msg1" value="#{messageBean.selectedMessage}">
<p:column headerText="id">
<h:outputText value="#{msg1.msgId}"/>
</p:column>
<p:column headerText="to person">
<h:outputText value="#{msg1.toPerson}"/>
</p:column>
</p:dataTable>
</p:dialog>
然后应打开此对话框（并成功打开，但不显示任何内容）
selectedMessage为什么对话框数据表不能显示任何内容？
messages是<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:id="@+id/drawer_layout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#FFFFFF"
tools:context=".MainActivity">
<android.support.design.widget.CoordinatorLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.design.widget.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<android.support.v7.widget.Toolbar xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/toolbar"
style="@style/toolbarStyle"
android:layout_width="match_parent"
android:layout_height="57dp"
app:layout_scrollFlags="scroll|enterAlways">
<RelativeLayout
android:id="@+id/focusHolder"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:focusable="true"
android:focusableInTouchMode="true"
android:paddingBottom="10dp"
android:paddingTop="10dp">
<Button
android:id="@+id/tmpBtn"
android:layout_width="48dp"
android:layout_height="match_parent"
android:layout_alignParentRight="true"
android:background="@null" />
<EditText
android:id="@+id/addressBar"
style="@style/addressBarStyle"
android:layout_width="match_parent"
android:layout_height="30dp"
android:layout_centerVertical="true"
android:layout_toLeftOf="@id/tmpBtn"
android:imeOptions="actionGo"
android:singleLine="true" />
</RelativeLayout>
</android.support.v7.widget.Toolbar>
</android.support.design.widget.AppBarLayout>
<android.support.v4.widget.NestedScrollView
android:id="@+id/scrollView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/darkGreen"
android:fillViewport="true"
app:layout_behavior="@string/appbar_scrolling_view_behavior">
<RelativeLayout
android:id="@+id/webViewWrapper"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/yellow">
<WebView
android:id="@+id/webView"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ProgressBar
android:id="@+id/progressBar"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true" />
</RelativeLayout>
</android.support.v4.widget.NestedScrollView>
</android.support.design.widget.CoordinatorLayout>
<!-- Nav drawer -->
<fragment
android:id="@+id/navigation_drawer"
android:name="com.example.fastbrowser.NavigationDrawerFragment"
android:layout_width="@dimen/navigation_drawer_width"
android:layout_height="match_parent"
android:layout_gravity="start"
android:layout_marginTop="57dp"
tools:layout="@layout/fragment_navigation_drawer" />
</android.support.v4.widget.DrawerLayout>
类型的列表，不为空。
答案 0 :(得分：0)
每次点击后都需要更新对话框：
<p:commandLink ... process="@this" update=":msgForm:dlgPanel" onComplete="PF('dlg1').show();"/>