Question

我正在使用Primefaces和JSF创建一个selectonemenu。我想显示一条消息“选择其中一个选项”。我怎么能这样做？

这是代码：

  <!--Gender-->
           <p:selectOneMenu id="gender" value="#{users.gender}" required="true"
                               requiredMessage="Choose one of the options">
            <f:selectItem itemLabel="Choose gender" itemValue="#{null}" />
             <f:selectItem itemLabel="Male" itemValue="Male" />
            <f:selectItem itemLabel="Female" itemValue="Female" />
          </p:selectOneMenu>

谢谢

Answer 1

在提交按钮下面添加也可以正常工作。 AJAX = “假”

*********************edited**********
As you requested, please find below block of codes that works fine for me  ::                                                                                                                                                                                                    

<h:form>
<p:panelGrid  style="margin-top:5px;width:730px;">
 <f:facet name="header">
   <p:row >
    <p:column colspan="20">Select Company</p:column>
   </p:row>
 </f:facet>

 <p:row>
   <p:column>
     <p:selectOneMenu id="companyMenu" value="#{clientList.clientCode}" 
           style="width:550px;margin:5px;text-color:black" required="true" 
                               requiredMessage="Please select a company !">
       <f:selectItem itemLabel="Select a Company" noSelectionOption="true" 
                                                 itemValue="#{null}" />
       <f:selectItems value="#{clientList.clients.entrySet()}" var="entry"  
                           itemValue="#{entry.key}" itemLabel="#{entry.value}" >
       </f:selectItems>
     </p:selectOneMenu>
   </p:column>

   <p:column>
     <p:commandButton value="Submit" style="margin:5px;" action="#
            {viewPayment.companyDetails(clientList.clientCode)}" ajax="false"/>
   </p:column>
 </p:row>

</p:panelGrid>

</h:form>

Answer 2

您可以使用：

if (users.getGender()==null) {
            FacesContext.getCurrentInstance().addMessage(
                    null,
                    new FacesMessage(FacesMessage.SEVERITY_ERROR,
                            "Choose one of the options",
                            "Choose one of the options"));
}

Answer 3

已解决。我忘记将代码行<p:message for="gender" />添加到代码中。感谢。

Primefaces selectonemenu required消息

3 个答案: