Problems with Treeview.Nodes.Clear()

6 Feb 2006 10:16 AM

juvi

Hi, I have got a problem with Treeview.Nodes.Clear() under VB2005.

When I have some nodes in my treeview and a force to clear() all nodes then
it seems to work, because the nodes are not visible. But when I add new nodes
and I want to look for a specific item then I only get the Items from the
beginning --> something is not working with the clear() method.

Please help me!?! juvi

6 Feb 2006 1:12 PM

Patrice

You perhaps kept a reference to an old node ?

I'm using the clear method and didn't noticed anything for now...

--
Patrice

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"juvi" <j***@discussions.microsoft.com> a écrit dans le message de
news:BAF6952D-F897-42E4-B373-B4427B5198C4@microsoft.com...
> Hi, I have got a problem with Treeview.Nodes.Clear() under VB2005.
>
> When I have some nodes in my treeview and a force to clear() all nodes
then
> it seems to work, because the nodes are not visible. But when I add new
nodes
> and I want to look for a specific item then I only get the Items from the
> beginning --> something is not working with the clear() method.
>
> Please help me!?! juvi

6 Feb 2006 2:22 PM

juvi

How can I delete such references?

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"Patrice" wrote:

> You perhaps kept a reference to an old node ?
>
> I'm using the clear method and didn't noticed anything for now...
>
> --
> Patrice
>
> "juvi" <j***@discussions.microsoft.com> a Ã©crit dans le message de
> news:BAF6952D-F897-42E4-B373-B4427B5198C4@microsoft.com...
> > Hi, I have got a problem with Treeview.Nodes.Clear() under VB2005.
> >
> > When I have some nodes in my treeview and a force to clear() all nodes
> then
> > it seems to work, because the nodes are not visible. But when I add new
> nodes
> > and I want to look for a specific item then I only get the Items from the
> > beginning --> something is not working with the clear() method.
> >
> > Please help me!?! juvi
>
>
>

6 Feb 2006 3:46 PM

Patrice

More precisely my thought would be that you might have kept in a variable a
reference to the root node or something similar. If you delete then the
treeview nodes and use this reference (perhaps adding it back to the
treeview) you could likely have this behavior.

Just double check that you don't use a variable that holds a reference to
past nodes. Just make sure tthat you don't add to the new list nodes that
were kept from the previous nodes...

For exemple (not tested) :

Dim Node as TreeNode
Node=New TreeNode("A")
Node.Nodes.Add("B")
TreeView1.Nodes.Add(Node)
TreeView1.Nodes.Clear
Node=New TreeNode("Other") ' If commented you should likely still see nodes
A and B child as you add backk an old node...
TreeView1.Nodes.Add(Node)

Good luck.

--
Patrice

Show quoteHide quote

"juvi" <j***@discussions.microsoft.com> a écrit dans le message de
news:B69E3083-B53B-41B7-9207-38F7F8D0FE9C@microsoft.com...
> How can I delete such references?
>
> "Patrice" wrote:
>
> > You perhaps kept a reference to an old node ?
> >
> > I'm using the clear method and didn't noticed anything for now...
> >
> > --
> > Patrice
> >
> > "juvi" <j***@discussions.microsoft.com> a écrit dans le message de
> > news:BAF6952D-F897-42E4-B373-B4427B5198C4@microsoft.com...
> > > Hi, I have got a problem with Treeview.Nodes.Clear() under VB2005.
> > >
> > > When I have some nodes in my treeview and a force to clear() all nodes
> > then
> > > it seems to work, because the nodes are not visible. But when I add
new
> > nodes
> > > and I want to look for a specific item then I only get the Items from
the
> > > beginning --> something is not working with the clear() method.
> > >
> > > Please help me!?! juvi
> >
> >
> >