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);
         }
      }

Hello Foxjazz,

Thank you for the snippets, still just from them I am not able to understand your scenario. Would you please provide me with a test sample where this issue is representable so I can continue my investigation on this issue.

Thanks in advance.

Well I am having a couple of issues.

The issue I have is that the dropdown info still shows up, but when you select one of the results, the content doesn't get populated the the resulting value.

For the dropdown I am clearing the underlying List class that the itemsource property is bound to.

In clearing it I have this code: in my mvvm

   _xcEqMake.Clear();
           _xcEqMake.Add(new EqData { String = "" });

and in the form.cs I have

 xamcMake.SelectedItem = prdApp.xcEqMake[prdApp.xcEqMake.Count - 1];

Hello foxjazz,

I am still not able to understand the exact scenario that you are trying to implement. Would you provide me with some additional details about the way that you populate the control with data and where do you use a dropdown. Also it will be helpful if you could provide me with some screenshots and a small test sample with the issues, so I can be sure that we are looking over the same functionality.

Thanks in advance.

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.

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! 

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.

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.

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?