Hello,
I have populated a treeview in asp.net 2.0 from an xmldocument. The
treeview structure in the asp web page looks something like...
-orderdata
-order
-lines
-operations
-materials
-material
-partnumber="123 "
-description="br ass bolt"
-quantity="1"
-type="Job"
-units="grams"
-material
-partnumber="ABC "
-description="pl ywood"
-quantity="9"
-type="Job"
-units="pounds"
-material
-partnumber="999 "
-description="me tal frame"
-quantity="2"
-type="Job"
-units="whole"
....
the point is, there are multiple material children to a materials parent.
The treeview is name TreeViewForXml
My selectednodecha nged callback begins like..
Protected Sub TreeViewForXml_ SelectedNodeCha nged(ByVal sender As Object,
ByVal e As System.EventArg s) Handles TreeViewForXml. SelectedNodeCha nged
Dim TextToEdit, StringToParse() As String
HideAllEditFiel ds()
ListBoxForOrder Information.Ite ms.Add("Selecte d value=" &
TreeViewForXml. SelectedNode.Va lue & _
" text=" & TreeViewForXml. SelectedNode.Te xt)
......
The problem is, sometimes if I click on quantity="2" (or any other quantity
that is not in the first material child of materials), the selectednode(or
the message I get in my listbox) is quantity="1"(or always the quantity node
in the first material child of materials). In the above example, there are
3 material children of materials but there could be 20 material children or
more.
I am seeing this happen if I selected partnumber="999 ", the TreeviewForXml.
SelectedNode is partnumber="123 "(the first child in the list of material
children).
What am I doing wrong to trap selectednode?
I know the TreeNodeCollect ion.IndexOf(tre enode) method will return the first
occurrence of a node if it appears multiple times in the collection.
Is this also the rule with a treeview and selectednode?
thanks.
1  4739 
Good news. Problem solved. =
Some background:
A treenode has two fields that may be set to strings: text and value.
When I was creating my treeview, I was setting the treenode.text field and the treeno=
de.value field to the same string, in this example, =E2=80=9Cmateri al=E2=80=9D.
=
I changed the code used to populate the treeview by using a running counter for each ma=
terial treenode created.
For example,
The first material treenode contained =
treenode.value =3D material1 =
treenode.text =3D material
The second material treenode contained =
treenode.value =3D material2 =
treenode.text =3D material
The 3rd material treenode contained =
treenode.value =3D material3 =
treenode.text =3D material
The nth material treenode contained =
treenode.value =3D materialn =
treenode.text =3D material
=
After I did this, when I selected a partnumber, type, units, etc(children of each mat=
erial node), it did resolved correctly to the treenode I thought I selected.
So this tells me that asp.net 2.0 treeview needs some uniqueness to the VALUE field of=
treenodes for selectedNode to correctly resolve.
=
I also tested not setting the value field to a unique string and setting the text field=
to a unique string and the problem still existed.
=
I just wish this caveat was documented.
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