I wrote a piece of code based on the "populate on demand" example taken from the quickstart package.

The datas come from SQL server (auto refer table with parentId and NodeId), and for each node I have a Title and a detail. When I click a node, I read those values from the database. Everything is working as expected.

Now... moving the mouse over any node of the treeview, I get a link like "__dopostback(blahblahblah...)" which of course make sense.

It does not make sense if I want to create a "browsable" link to that node. I mean.... how can I create a valid link to a node xyz and be able to server side browse the table structure in order to reach that node?

Treeview Example

Root
   +   Folder1
           -   Leaf 1
           -   Leaf 2
           -   Leaf 3

If I right click "Leaf 2" and click the context menu item "Copy Link", I get a "no-sense" link to a user.
The user cannot use that link and send it to someone else, say by e-mail, cause that link is a postback instruction.

 Should I use the sitemapdatasource thingie? I have no idea, went through it but had no clue of how to use it binding the control to a database (don't even know if I can do that)

I tried to build a link on my own which could make sense, using the valuepath. The findNode function does not work (I wonder if the problem is the load on demand) and now an idea comes up: is it some events that I should hook somewhere?

That's it, if anyone has a tip would be welcome.

Cheer

Hi,

If a node's PopulateOnDemand property is set to true, the node is populated at run time through a postback event when the node is expanded. However this requires javascript to support this kind dynamic node population:

"__dopostback(blahblahblah...)"

This is why the URL is something like __dopostbak.

In your example, you can have the PopulateOnDemand property of Folder1 set to true to enable populate on demand feature. But you can disable this feature on the leaf node to make them render differently.

Root
   +   Folder1
           -   Leaf 1
           -   Leaf 2
           -   Leaf 3

In the TreeNodePopulate event which populate a node dynamically. You can add a dynamical node to Folder1 node like this:

NewNode.PopulateOnDemand = False

Hope it helps!

hmm, ok, this is exactly what I currently do.

My question was a bit more complicated.

I would like to be able to have a link which "make sense" from a standard web link point of view.

In other words, if I'm on the node which I can describe as having the valuepath equal to 1\5\46\265, I would like to know if is there a way to automatically set a web link which the user can reuse later to reach that node once again, says a few hours later or even days later.

standard link

javascript:__doPostBack('ctl00$ContentPlaceHolder1$spl1$ctl00$ctl01$TreeView1','s0\\1\\10')

"make sense" link

 http://somethinghere/treeview.aspx?mypath=0\\1\\10

 make sense?

I guess this is not really comprehensible...