Why make portal Iview visible or not, contained in a portal page ?

Question

Hi,
Within the framework of a gate(portal) SAP, I have to make visible or no Iview.
This Iview is contained in a page.
I get back the role (PCD Role) of this page but I do not manage to change the attribute of Iview to make him(it) invisible.
Here is my code:
//***********************Code gestion des propriétés de l'IVIEW************************
try {
     Hashtable env = new Hashtable();
     env.put(
             Context.INITIAL_CONTEXT_FACTORY,                                                IPcdContext.PCD_INITIAL_CONTEXT_FACTORY);
     env.put(
             Constants.REQUESTED_ASPECT,
          PcmConstants.ASPECT_SEMANTICS);
     env.put(
          Context.SECURITY_PRINCIPAL,
          request.getUser());
     env.put(
          IPcdContext.PCD_PERSONALIZATION_PRINCIPAL,
          request.getUser());
     InitialContext iCtx = null;
     String pageID = "portal_content/fr.dggn.DIR_DGGN/fr.dggn.DOS_PRT_DEL/fr.dggn.ZPRT_DEL_STANDARD/WRK_AVC_PERSO_MAIN/fr.dggn.WRK_PRT_DEL/fr.dggn.PGE_PRT_DELEG_LISTE_DELEG";
//je vais rendre visible les iviews                         
     iCtx = new InitialContext(env);
        IPage myPage = (IPage) iCtx.lookup(pageID);
     Enumeration myIviews = myPage.getiViews();
     while (myIviews.hasMoreElements()) {
     Binding bind = (Binding) myIviews.nextElement();
     IiView myIview = (IiView) bind.getObject();
//on rend invisible l'Iview
     myIview.putAttribute(
          IAttriView.ATTRIBUTE_NAVINVISIBLE,
          IAttriViewValues
          .AVAILABILITY_VALUE_AVAILABLE);
//on sauvegarde l'Iview moifié
     myIview.save();
     } //fin du while
        } //fin du try
Can use me and tell me how to arrive at my project ?
Tank's,
Regards,
Florian,

Answer 1

Florian,
The property that have to be changed is "Invisible in Navigation Area".
His ID is : "com.sap.portal.navigation.Invisible"
<u>But</u> , if I do this change in an iView of page, I've to refresh my Browser for the effect to take effect.
To avoid this, you should try to change the default value of the parameter "Allow Client-Side Caching" from Yes to No
Hope this help
Vincent