从Backing Bean显示Primefaces confirmDialog

Question

我有一个Primefaces数据表,当用户点击一行时,我会在表单中显示要编辑的数据.如果用户更改表单中的数据并单击任何其他行,即如果存在脏数据,则需要弹出confirmDialog以显示用户是否要保存数据/丢弃数据.当我尝试从辅助bean执行它时,confirmDialog不会显示.任何帮助表示赞赏!

我已经实现如下:

.xhtml:

<p:dataTable id="tsTableId" value="#{transactionSetBean.studentList}" var="tsRow"
     selectionMode="single" selection="#{transactionSetBean.selectedEditRec}" rowKey="#{tsRow.id}" scrollRows="10">
    <p:ajax event="rowSelect" listener="#{transactionSetBean.onRowSelect}" update=":transactionSetsForm:tsEntryFrmId">
    </p:ajax>
..
</p:dataTable>

ConfirmDialog:

<p:confirmDialog widgetVar="dataChangeDlg"  message="Save changes Or Cancel">                                
<p:commandButton value="Save Changes" oncomplete="PF('dataChangeDlg').hide();" 
          update=":transactionSetsForm:messages :transactionSetsForm:tsEntryFrmId" 
              action="#{transactionSetBean.updateRecord}" />
<p:commandButton value="Cancel"   onclick="PF('dataChangeDlg').hide();"                             

</p:confirmDialog>

支持Bean:

public void onRowSelect(SelectEvent event)
    {
        String actionName = ON_ROW_SELECT;
        try
        {
            Student selectedObj = (Student)event.getObject();
            if (selectedObj != null)
            {
                selectedEditRec = selectedObj;
            }
            // if data is changed then show the dataChange dialog 
            if (isDataChanged())
            {
                setShowDataChangedDialog(true);
                RequestContext context = RequestContext.getCurrentInstance();
                // execute javascript and show dialog
                context.execute("PF('dataChangeDlg').show();");
            }

        }
        catch (Exception e)
        {
            handleException(e);
        }
    }

Answer 1

RequestContext.getCurrentInstance().execute("PF('dataChangeDlg').show();");

<p:ajax event="rowSelect" listener="#{transactionSetBean.onRowSelect}" update=":transactionSetsForm:tsEntryFrmId">

适合我.必须有另一个错误.也许isDataChanged是错误的,更新中的错误组件ID或其他东西.