Display images from database with dialog

[AFC_Primefaces]

Hello

I have the next problem, i have a page with view scope.

I have a datatable with rows as entity. Each entity has an image and if you want to edit, you can do it through p:dialog.

So i load the data of the entity with a commandButton (with actionListener) and open the dialog (with oncomplete) too:

Code: Select all

<p:commandLink id="btnImgNtrDlg" update=":dlgImgNtr"
                        actionListener="#{entrevistaBean
                                          .getEntrevistaPk(obj.codEntrevista)}"
                        oncomplete="mostrarComponente('wdgImgNtr')">
            <h:graphicImage value="#{msj.imgCamara}" styleClass="imgCentro"/>
         </p:commandLink>

In dialog:

Code: Select all

<p:graphicImage id="ghLoadImg" cache="false" 
                               styleClass="margin10 heigth70"
                               alt="#{entrevistaBean.auxNtr.problemaPrincipal}"
                               value="#{entrevistaBean.auxNtr.imagen}"
                               rendered="#{entrevistaBean
                                          .isNtrImagen(entrevistaBean.auxNtr)}">
                  <f:viewParam name="paramId"  
                              value="#{entrevistaBean.auxNtr.codEntrevista}" />
               </p:graphicImage>

In backingBean we try to load the image:

Code: Select all

public StreamedContent getImagen() {
      FacesContext context;
      context = FacesContext.getCurrentInstance();
 
      // Devolvemos StreamedContent real con la imagen en bytes.     
      EntrevistaBean bean;
      String paramId;
      paramId = context.getExternalContext().getRequestParameterMap().get("paramId");
      if (paramId != null) {
         bean = entrevistaSrv.getEntrevistaId(Integer.valueOf(paramId));
         return new DefaultStreamedContent(
                 new ByteArrayInputStream(bean.getImgEntrevista()));
      } else {
         return new DefaultStreamedContent(
                 new ByteArrayInputStream(this.getImgEntrevista()));
      }  
   }

But graphicImage never load correctly. I was reading about set the id of graphicImage and i think could be the problem. I had testing several ways to set the imageId but I did not get it.


If I change the scope to session (and a few changes in backing bean) the image is displayed it but i want to get it with view scope, is it possible?

Help!

[tandraschko]

StreamedContent doesn't work with ViewScoped because the image is streamed in another request.

[AFC_Primefaces]

So there is no way to load images from database with view scope?

Thanks for your reply, tandraschko

[tandraschko]

exactly. But as you already pass a param to the resource request, you can just pass the id of the entity and load it in this request.