treeview frustrations...

[blowfelt]

hello,

 

i'm trying to implement a treeview control populated by hierarchial data returned from a database.

 

i have a parent child and name structure returned from a select statement into a data reader record set.

 

i can see that there are no longer parent/child properties of the node objects (i used to use vb6).

 

how can i code this?

 

when i've tried to iterate through the nodes to find a specific value in order to add children, the nodes only itterate the imediate child level?

 

arrrrgggggg:(

 

thanks

[Volte]

Each Node has its own Node collection. To add a node, just add to the Node's Nodes collection. And yes, there is indeed a Parent property of the TreeNode object to tell you which node it is a child of.

[blowfelt]

cheers simon,

but how do i get back to a specific node to add more children?

 

like i said, when i try to itterate through the nodes i can only check the top level?

[Volte]

Well, you would store the node when you add it. Like this:

Dim n As New Node

n.Text = "This is the top node!"
n.Nodes.Add("This is a child of that node!")
Dim nc As Node = n.Nodes.Add("This is a second child!")
nc.Nodes.Add("This is a child of a child!")

tree.Nodes.Add(n)

Try that.

[blowfelt]

cheers simon,

 

i understand the code you've supplied, but that assumes you know how many parent levels/nodes are needed...

 

i need to implement the code in a loop that can call up previous nodes and add to them...

 

i think i may be missing a trick???

[Volte]

I don't know what you need.... as long as you store the parent node in a variable (or find it by iterating through recursively through the TreeView's Nodes collection), you can add children to it.