Add child nodes to treeview

[stustarz]

Hello

 

I currently have the following code to retrive records from a Dataset and populate the treeview. I would like to now place child nodes under each parent, from a different dataset where the seasons are equal (you'll see what i mean in the code). I'm really stuck as to how to do this:

 

Current Code:

 

'Populate Treeview

Dim varTVItem As TreeNode

Dim varDSRow As DataRow

 

tvSeasons.Nodes.Clear()

dsSeasonData = DsSeasons1

For Each varDSRow In dsSeasonData.Tables("seasons").Rows

 

varTVItem = New TreeNode()

 

With varTVItem

.Text = varDSRow.Item("Season")

End With

tvSeasons.Nodes.Add(varTVItem)

Next

 

Thanks in advance

[divil]

Each Node is an object in itself, of type TreeNode. Every Node has a Nodes collection, of all its children.

 

So to add a child node, use myNode.Nodes.Add().

[stustarz]

Hi

 

Thanks for the reply

 

The only problem i'm having is implementing this into the code. Would be able to tell me how to put this into the code I already have.

 

Thanks

[divil]

No, because I don't know how your data is structured.

 

To add a child node to the one you're making,

 

varTVItem.Nodes.Add("blah")

[Nerseus]

Each time you call Add, it returns the node that was added. Using that node, you can add children easily. As divil said, your DataSet may be structured to make things easier (or even recursive), but here's a sample to show how to add 3 parent nodes. Each parent node will have 2 children.

 

// Add a parent node
TreeNode node = treeView1.Nodes.Add("hello 1");
// Add two children.
// This works because both children use "node" as the parent
// to add to. The "node" variable is not reset
// til farther down.
node.Nodes.Add("child 1");
node.Nodes.Add("child 2");

// Here, node is reset to be the *next*
// parent node. It's a parent because it's
// added directly to the treeView1 control
node = treeView1.Nodes.Add("hello 2");
node.Nodes.Add("child 1");
node.Nodes.Add("child 2");

node = treeView1.Nodes.Add("hello 3");
node.Nodes.Add("child 1");
node.Nodes.Add("child 2");

 

-Nerseus