当“selectOneMenu”放置在“dataTable”列标题中时:1)每次打开它或单击它旁边的按钮并打开“selectOneMenu”后触发行排序(不应该那样);2) 未能为支持 bean 赋值。如何将“selectOneMenu”附加到列标题以便不会发生这些问题?
*.xhtml 代码与 dataTable 导致 1) 和 2) 问题:
<h:form id="someForm0">
<p:dataTable id="sdt" var="variable" value="#{otherBean.tableModel}" rows="10">
<p:column sortBy="#{variable.name}" filterBy="#{variable.name}" filterMatchMode="contains" >
<f:facet name="header">
<h:outputText value="Name"/>
<h:panelGrid columns="2" cellpadding="1">
<p:selectOneMenu id="abc" value="#{userBean.someChars}">
<f:selectItem itemLabel="" itemValue="select" />
<f:selectItem itemLabel="AAA" itemValue="AAA" />
<f:selectItem itemLabel="BBB" itemValue="BBB" />
<f:selectItem itemLabel="CCC" itemValue="CCC" />
</p:selectOneMenu>
<h:commandButton id="btn" value="Submit" type="submit" action="#{userBean.submitChars}"/>
</h:panelGrid>
</f:facet>
<h:outputText value="#{variable.name}"/>
</p:column>
</p:dataTable>
</h:form>
支持 bean 代码:
@ManagedBean
public class UserBean
{
private String someChars;
public String getSomeChars()
{
return someChars;
}
public void setSomeChars(String someChars)
{
this.someChars = someChars;
}
public String submitChars()
{
if(getSomeChars() != null)
{
System.out.println("Selected chars are: " + getSomeChars());
}
else
{
System.out.println("Selected chars are equal to null!");
}
return null;
}
}
这是前面提到的 *.xhtml 代码的片段,并且 selectOneMenu 放在基本表单中时效果很好:
<h:form id="someForm">
<p:selectOneMenu id="abc" value="#{userBean.someChars}">
<f:selectItem itemLabel="" itemValue="select" />
<f:selectItem itemLabel="AAA" itemValue="AAA" />
<f:selectItem itemLabel="BBB" itemValue="BBB" />
<f:selectItem itemLabel="CCC" itemValue="CCC" />
</p:selectOneMenu>
<h:commandButton id="btn" value="Submit" type="submit" action="#{userBean.submitChars}"/>
</h:form>
我认为最后的手段是将 dataTable 列标题中的元素添加到 dataTable 标题中:
<h:form id="someForm1">
<p:dataTable id="sdt" var="variable" value="#{otherBean.tableModel}" rows="10">
<f:facet name="header">
<h:panelGrid columns="2" cellpadding="1">
<p:selectOneMenu id="abc" value="#{userBean.someChars}">
<f:selectItem itemLabel="" itemValue="select" />
<f:selectItem itemLabel="AAA" itemValue="AAA" />
<f:selectItem itemLabel="BBB" itemValue="BBB" />
<f:selectItem itemLabel="CCC" itemValue="CCC" />
</p:selectOneMenu>
<h:commandButton id="btn" value="Submit" type="submit" action="#{userBean.submitChars}"/>
</h:panelGrid>
</f:facet>
<p:column sortBy="#{variable.name}" filterBy="#{variable.name}" filterMatchMode="contains" >
<f:facet name="header">
<h:outputText value="Name"/>
</f:facet>
<h:outputText value="#{variable.name}"/>
</p:column>
</p:dataTable>
</h:form>