Hi,

I am a beginner with dotnetnuke and i try to develop a module. I use the dnn treeview but i've got a problem. When i check some subnode, the page postback and the treeview disapear (did not feed). This problem seems not to appear when i am connected as admin. i'm a little bit disapointed !! Here the source

// the populate function
private void PopulateTree()
        {
           MyDNNTree.TreeNodes.Clear();

          CalendrierController objFormations = new CalendrierController();
          List<CalendrierInfo> LstCalendrierInfo = objFormations.GetCalendrierByPeriode(Convert.ToDateTime("2006/09/01"), Convert.ToDateTime("2006/10/25"));

         
           string curLibelleGenre = "";
           string curLibelleFormation = "";
           DotNetNuke.UI.WebControls.TreeNode tnFormation = new DotNetNuke.UI.WebControls.TreeNode();

           foreach (CalendrierInfo objCalendrier in LstCalendrierInfo)
           {
               if (objCalendrier.LibelleGenre != curLibelleGenre)
               {
                   tnGenre2 = new DotNetNuke.UI.WebControls.TreeNode();
                   tnGenre2.Text = objCalendrier.LibelleGenre;
                   tnGenre2.ClickAction= eClickAction.Expand;
                   tnGenre2.CssClass = "SecteurFormation";
                   MyDNNTree.TreeNodes.Add(tnGenre2);
               }
               if (curLibelleFormation != objCalendrier.LibelleFormation)
               {
                   tnFormation = new DotNetNuke.UI.WebControls.TreeNode();
                   tnFormation.Text = objCalendrier.LibelleFormation;
                   tnFormation.ID = objCalendrier.IdFormation;
                   tnFormation.CssClass = "LibelleFormation";
                   tnGenre2.TreeNodes.Add(tnFormation);
               }
               curLibelleFormation = objCalendrier.LibelleFormation;
               curLibelleGenre = objCalendrier.LibelleGenre;
           }
                  
        }

//the page load
        protected void Page_Load(System.Object sender, System.EventArgs e)
        {
            try
            {
                if (!Page.IsPostBack)
                {
                    PopulateTree();
                }
            }
            catch (Exception exc) //Module failed to load
            {
                Exceptions.ProcessModuleLoadException(this, exc);
            }
        }

// and the eventhandler
        protected void MyDNNTree_PopulateOnDemand(object source, DNNTreeNodeClickEventArgs e)
        {
            foreach (DotNetNuke.UI.WebControls.TreeNode TnCur in MyDNNTree.SelectedTreeNodes)
            {
                Label1.Text = Label1.Text + "-" + TnCur.Text.ToString() + "-" + TnCur.ID.ToString() ;            }
        }


Is there anyone who understand my problem and can help me ?

Thanks a lot

Thanks, i've resolved this issue. It was just an issue with the dnn cache. I use postback because I need to update some som control. Now it works, I will try to implement ajax functionality. But before i will read another time the doc !! Thanks again