p：commandButton与p：fileDownload并且没有ajax只能在第二次点击 [英] p:commandButton with p:fileDownload and no ajax only works in second click

问题描述

我正在使用JSF 2.0，Primefaces 3.4.2，Spring 3.1.2。

我正在面对这个链接的人的类似问题： href =https://stackoverflow.com/questions/11618450/hcommandbutton-works-from-the-second-click> h：commandButton从第二次点击工作。

像他一样，我没有在< p：commandButton> 中使用ajax，但是我正在使用 p：fileDownload /> 在按钮标签内。

我有两个视图：list.xhtml和downloadView.xhtml。在 myBean.java 我从视图list.xhtml发送一个DataModel来查看downloadView.xhtml作为请求属性，如下面的代码所示：

  FacesUtil.getServletContext（）。setAttribute（myDataModelFromRequest，this.myDataModel）; 
  

该bean被标记为 @Scope（view）

在downloadView.xhtml视图中，我成功填充了一个dataTable，并从请求发送了DataModel。但是当我点击按钮下载文件时，会出现问题。它只适用于第二次尝试。
我已经尝试将我的方法的返回值从null更改为downloadView，但问题没有解决。

在调试模式下，我注意到只有输入在downloadMethod（）中第二次点击。

任何人都有一个想法来解决？

---

myBean.java

  public String viewListMethod（）{
 // some在这里工作... 
 
 FacesUtil.getServletContext（）。setAttribute（myDataModelFromRequest，this.myDataModel）; 
 
返回downloadView; 
} 
  

---

downloadView.xhtml

 < h：form id =formIdprependId =false> 
< p：dataTable 
 id =dataTableIdvar =myVarvalue =＃{myDataModelFromRequest}
 selection =＃{cargaProcessoControlador.myArray}
 paginator =truerows =10paginatorPosition =bottompaginatorAlwaysVisible =false> 
< f：facet name =header> 
 bla bla bla 
< / f：facet> 
 
< p：column selectionMode =multiplestyle =width：18px/> 
 
 // collumns here ... 
< / p：dataTable> 
 
 
< p：commandButton id =btDownloadajax =falsevalue =下载icon =ui-icon-document> 
< p：fileDownload value =＃{myBean.downloadMethod（）}/> 
< / p：commandButton> 
< / h：form> 
  

解决方案

春天的范围视图不存在所以你创建了自己的，对吧？只是为了检查...
我有这样的问题一次，我认为这是与验证有关...
immediate = true属性解决了我的问题。

I'm using JSF 2.0, Primefaces 3.4.2, Spring 3.1.2.

I'm facing a similar problem of the guy of this link: h:commandButton works from the second click.

Like him I'm not using ajax in the <p:commandButton> but I'm using a <p:fileDownload /> inside the button tag.

I have two views: "list.xhtml" and "downloadView.xhtml". In myBean.java I send a DataModel from view "list.xhtml" to view "downloadView.xhtml" as a request attribute as shown in the code below:

FacesUtil.getServletContext().setAttribute("myDataModelFromRequest", this.myDataModel);

The bean is anotted with @Scope("view")

In view "downloadView.xhtml" I populated succesfully a dataTable with the DataModel sent from request. But the problem happens when I click in the button to download the file. It only works on second try. I already tried to change the return of my method from null to "downloadView" but the problem was not solved.

In debug mode I noticed that only enter in the "downloadMethod()" on second click.

Anyone have an idea to solve it?

---

myBean.java

public String viewListMethod() {
    //some work here...

    FacesUtil.getServletContext().setAttribute("myDataModelFromRequest", this.myDataModel);

    return "downloadView";
}

---

downloadView.xhtml

<h:form id="formId" prependId="false">
    <p:dataTable
        id="dataTableId" var="myVar" value="#{myDataModelFromRequest}"                  
        selection="#{cargaProcessoControlador.myArray}" 
        paginator="true" rows="10" paginatorPosition="bottom" paginatorAlwaysVisible="false">
            <f:facet name="header">  
                    bla bla bla
            </f:facet>

            <p:column selectionMode="multiple" style="width:18px" />

            //collumns here...                      
    </p:dataTable>


    <p:commandButton id="btDownload" ajax="false" value="Download" icon="ui-icon-document" >
        <p:fileDownload value="#{myBean.downloadMethod()}" />
    </p:commandButton>
</h:form>

解决方案

The scope "view" on spring doesn´t exist... So you created your own, right? Just to check... I had that kind of problem once, and I think it was something to do with validation... the immediate=true attribute solved my problem.

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