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Gabor Barbaro
900
Databound Tree Bug
posted
there is a bug in UltraWinTree.TreeNodesCollection.InitializeBindingManager().
It works only in the RootNodesCollection of a tree, not in the sub levels of a recursive DataBinding. (I'm using NetAdvantages 12.2)
 
Take following data class:
 
public class TaskItem
{
   public string Name { get; set; }
   public List<TaskItem> Subs { get; set; }
}
 
Set ShowExpansionIndicator to Allways in the tree.
Bind the tree to following data struct of TaskItems:
 
Root1
Root2
   Sub1
   Sub2
Root3
 
Run the application.
Make a breakpoint in UltraWinTree.TreeNodesCollection.VerifyBoundNodes().
Expand Root2.
 
internal void VerifyBoundNodes()
{ 
      ...         
      this.InitializeDataList();
      if ( null == this.dataSource )
      {
         this.InitializeBindingManager();
      }
      this.PopulateBoundNodes();
}
 
InitializeDataList() gets the SubNodesCollection of Root2, it is correct.
InitializeBindingManager() sets the DataBinding to datasource=RootNodesCollection, datamember=”Subs”. It is false.
PopulateBoundNodes() ignores DataBinding and shows the SubNodesCollection, that is why users do not see the Bug.