I guess I am not being very clear. Manually I mean from code-behind.

Currently I have a half ass app working populating manually, but I am getting double events firing.

i.e.

 if (currXti.Level == 3 && currXti.Items.Count == 0)
         {
            currXtiType = (XamTreeItem)vwEqTree.ActiveItem;
            prdAppSVM.LoadTypes((vwYear) currXti.Tag);
            prdAppSVM.DisplayEqType += new EventHandler(prdAppSVM_DisplayEqType);
         }
         if (currXti.Level == 4 && currXti.Items.Count == 0)
         {
            currXtiModel = (XamTreeItem)vwEqTree.ActiveItem;
            prdAppSVM.LoadModels((vwType)currXti.Tag);
            prdAppSVM.DisplayEqModel += new EventHandler(prdAppSVM_DisplayEqModel);
         }
         if (currXti.Level == 5 && currXti.Items.Count == 0)
         {
            currXtiEngine = (XamTreeItem)vwEqTree.ActiveItem;
            prdAppSVM.LoadEngines((vwModel)currXti.Tag);
            prdAppSVM.DisplayEqEngine += new EventHandler(prdAppSVM_DisplayEqEngine);
         }
         if (currXti.Level == 6)
         {
            prdAppSub.ItemsSource = prdAppSVM.LoadAppSub((EqAll)currXti.Tag);
 
         }
      }
 
      void prdAppSVM_DisplayEqEngine(object sender, EventArgs e)
      {
         currXtiEngine.Items.Clear();
         foreach (Entity vcls in prdAppSVM.lEqEngines)
         {
            XamTreeItem xti = new XamTreeItem();
            EqAll eqa = (EqAll)vcls;
            xti.Header = eqa.EquipmentEngine;
            xti.Tag = eqa;
            currXtiEngine.Items.Add(xti);
         }
      }
 
      void prdAppSVM_DisplayEqModel(object sender, EventArgs e)
      {
         currXti.Items.Clear();
         foreach (Entity vcls in prdAppSVM.lEqModels)
         {
            XamTreeItem xti = new XamTreeItem();
            vwModel vwm = (vwModel)vcls;
            xti.Header = vwm.EquipmentModel;
            xti.Tag = vwm;
            currXtiModel.Items.Add(xti);
         }
 
      }
 
      void prdAppSVM_DisplayEqType(object sender, EventArgs e)
      {
         currXti.Items.Clear();
         foreach (Entity vcls in prdAppSVM.lEqTypes)
         {
            XamTreeItem xti = new XamTreeItem();
            vwType vwt = (vwType)vcls;
            xti.Header = vwt.EquipmentType;
            xti.Tag = vwt;
            currXtiType.Items.Add(xti);
         }
      }

My current implemntation is here:

foxjazz.net/pslite.zip

foxjazz.net/pslitedb.zip

The main thing I need is the template for the trees at all 6 levels.

Another thing I really need is to have expand indicators show on the TreeView at levels 5 and above.

And so when it is expanded, I can get the data dynamically and fill up the leaf from that level node.

Is there a way to do this without creating dummy nodes below to fool the tree into thinking it has nodes so the expander indicator shows?

Hello foxjazz,

I am not able to restore your database on my side, therefore I am not able to run your whole project. Would you please provide me with isolated test sample where I can research the mentioned behavior.

Thanks in advance.

The database is sql 2012. I do hope you are on the latest version of sql server.

Unfortunately the database and code have a close relationship with the things I am doing.

I have figured out how to auto-expand after populating the leafs.

So that issue can be marked resolved.

Hi Foxjazz,

I am also getting same issue. I am adding dummy node every time the child node expands and loads the remaining records as a child nodes.

I am getting no problem upto level 5 but when I load level6 data but the dummy node is not have the expandable icon to display rest of the records.

please suggest me any solution on this.

I want to know is it the limitation of xamTree to display only 6 levels of data?

Thanks!