Improve company productivity with a Business Account.Sign Up

x
?
Solved

Populate Treeview child nodes from a database

Posted on 2009-07-15
10
Medium Priority
?
428 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
Get expert help—faster!

Need expert help—fast? Use the Help Bell for personalized assistance getting answers to your important questions.

 
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

Free Tool: IP Lookup

Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

Join & Write a Comment

ASP.Net to Oracle Connectivity Recently I had to develop an ASP.NET application connecting to an Oracle database.As I am doing it first time ,I had to solve several problems. This article will help to such developers  to develop an ASP.NET client…
User art_snob (http://www.experts-exchange.com/M_6114203.html) encountered strange behavior of Android Web browser on his Mobile Web site. It took a while to find the true cause. It happens so, that the Android Web browser (at least up to OS ver. 2.…
In the video, one can understand the process of resizing images in single or bulk. Kernel Bulk Image Resizer is an easy to use tool for resizing large number of images. One can add and resize multiple images with this tool in single go. The video sh…
To export Lotus Notes to Outlook PST or Exchange and Domino Server files to Exchange Server or PST files with ease, go for Kernel for Lotus Notes to Outlook conversion tool. Through the video, you can watch the conversion process. A common user with…

579 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