Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

Populate Treeview child nodes from a database

Posted on 2009-07-15
10
Medium Priority
?
410 Views
Last Modified: 2012-05-07
I build a treeviews parent and 1st child nodes from a sitemap. so it looks like this:

- Cars
    - Ford
    - Nissan
 
Now I hit the database and generate a datatable, dt("Ford Models"). How do I bind the datatable to the "ford" child node so it looks like this?
- Cars
     - Ford
           - Taurus
           - Mustang
           - Fusion
Thanks!
0
Comment
Question by:bertino12
  • 5
  • 5
10 Comments
 

Author Comment

by:bertino12
ID: 24860101
Right now, I am just trying it like this, but when the page is finished loading it doesnt display the node as populated.
    Private Sub Page1_Unload(ByVal sender As Object, ByVal e As System.EventArgs) Handles Page1.Unload
        Dim dt As DataTable = popRootNodes()
        Dim parentNode As TreeNode = Nothing
        Dim currNode As TreeNode = Nothing
        Dim newNode As TreeNode = Nothing
 
        parentNode = Me.TreeView1.Nodes.Item(0)
        currNode = parentNode.ChildNodes.Item(0)
 
        newNode = New TreeNode("Taurus", "Taurus")
        currNode.ChildNodes.Add(newNode)
 
        newNode = New TreeNode("Mustang", "Mustang")
        currNode.ChildNodes.Add(newNode)
 
        newNode = New TreeNode("Fusion", "Fusion")
        currNode.ChildNodes.Add(newNode)
 
        currNode.Expanded = True
    End Sub

Open in new window

0
 
LVL 7

Accepted Solution

by:
Randy Wilson earned 2000 total points
ID: 24861252
Is this ASP.Net?  Web TreeView has no Item collection...
0
 

Author Comment

by:bertino12
ID: 24861633
Yes asp .net, so how do you add items dynamically?
0
Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

 
LVL 7

Expert Comment

by:Randy Wilson
ID: 24861935
parentNode = Me.TreeView1.Nodes.Add(someTreeNodehere)
0
 
LVL 7

Expert Comment

by:Randy Wilson
ID: 24861956
If you are looking for a more complete answer, post more complete code.  BTW, why are you doing this in the Page Unload Event?
0
 

Author Closing Comment

by:bertino12
ID: 31603874
Ok for the web treeview use PopulateOnDemand
0
 
LVL 7

Expert Comment

by:Randy Wilson
ID: 24862182
There is no PopulateOnDemand property/method for the Web TreeView.  Would not make sense in the PostBack (stateless) environment of the web.
0
 
LVL 7

Expert Comment

by:Randy Wilson
ID: 24862274
My bad, did not pay attention to the question..
0

Featured Post

What does it mean to be "Always On"?

Is your cloud always on? With an Always On cloud you won't have to worry about downtime for maintenance or software application code updates, ensuring that your bottom line isn't affected.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Just a quick little trick I learned recently.  Now that I'm using jQuery with abandon in my asp.net applications, I have grown tired of the following syntax:      (CODE) I suppose it just offends my sense of decency to put inline VBScript on a…
The article shows the basic steps of integrating an HTML theme template into an ASP.NET MVC project
This Micro Tutorial will teach you how to add a cinematic look to any film or video out there. There are very few simple steps that you will follow to do so. This will be demonstrated using Adobe Premiere Pro CS6.
Look below the covers at a subform control , and the form that is inside it. Explore properties and see how easy it is to aggregate, get statistics, and synchronize results for your data. A Microsoft Access subform is used to show relevant calcul…

926 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question