填充模型后，对话框不会更新 [英] Dialog not updating after populating model in action method

问题描述

我正在使用一个原子对话框。我有一个项目列表，每当我选择一个项目，我想要对话框显示该项目名称。但是，这并没有发生。而不是显示项目名称，对话框根本不显示任何名称。我已经发布了我的代码。

 < h：form> 
< h：dataTable binding =＃{table}value =＃{item.itemList}> 
< h：column> 
< h：link value =＃{item.itemList [table.rowIndex]}outcome =item> 
< f：param name =itemNamevalue =＃{item.itemList [table.rowIndex]}/> 
< / h：link> 
< / h：column> 
< h：column> 
< p：commandButton action =＃{item.setItem（item.itemList [table.rowIndex]）}id =showDialogBu​​tton
 type =linkvalue =Deleteonclick = dlg.show（）/> 
< / h：column> 
< / h：dataTable> 
< br /> 
< p：dialog header =ItemwidgetVar =dlgresizable =false> 
<！ - 我也尝试过Item：＃{item.item}  - > 
< p>项目：< f：attribute name =contentIdvalue =＃{item.item}/> < / p为H. 
< p：commandButton id =submitButtonvalue =是action = 
＃{item.deleteItem}oncomplete =dlg.hide（）;> 
< / p：commandButton> 
< p：commandButton id =cancelButtonvalue =取消oncomplete =dlg.hide（）; /> 
< / p：dialog> 
 
< / h：form> 
  

我的getter和setter只是通用的getter和setter。

解决方案

在开始之前忘了更新对话框。

  p：commandButton ... update =dialogId/> 
  

我还建议使用 oncomplete 而不是 onclick 打开对话框。

另请参见：

• 了解PrimeFaces的流程和更新属性


• 如何从p：dataTable中显示当前行的详细信息ap：对话框


• 如果update =dlg，则原始对象不总是显示;在commandButton

I am using a primefaces dialog box. I have a list of items, and whenever I choose an item, I want the dialog box to display that item name. However, this is not happening. Rather than displaying the item name, the dialog is not displaying any name at all. I've posted my code below.

       <h:form>
         <h:dataTable binding="#{table}" value="#{item.itemList}" >
          <h:column>
            <h:link value="#{item.itemList[table.rowIndex]}" outcome="item">
              <f:param name="itemName" value="#{item.itemList[table.rowIndex]}" />
            </h:link>
          </h:column>
          <h:column>
            <p:commandButton action="#{item.setItem(item.itemList[table.rowIndex])}" id="showDialogButton" 
                             type="link" value="Delete" onclick="dlg.show()" />
          </h:column>
        </h:dataTable>
        <br />
        <p:dialog header="Item" widgetVar="dlg" resizable="false">
          <!-- I've also tried Item: #{item.item} -->
          <p>Item: <f:attribute name="contentId" value="#{item.item}"/> </p>
          <p:commandButton id="submitButton" value="Yes" action=
              "#{item.deleteItem}" oncomplete="dlg.hide();">
          </p:commandButton>
          <p:commandButton id="cancelButton" value="Cancel" oncomplete="dlg.hide();" />
        </p:dialog>

      </h:form>

My getters and setters are just generic getters and setters.

解决方案

You forgot to update the dialog before opening.

<p:commandButton ... update="dialogId" />

I also suggest to use oncomplete instead of onclick to open the dialog.

See also:

• Understanding process and update attributes of PrimeFaces
• How to show details of current row from p:dataTable in a p:dialog
• Primefaces p:dialog doesn't always show up if update="dlg" in commandButton

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