Solved

populating a treeview from a xml source

Posted on 2009-04-06
1
395 Views
Last Modified: 2013-11-08
I am really very new to asp.net. I have a code below that I am using to populate a treeview.
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
 
      Try
            ' SECTION 1. Create a DOM Document and load the XML data into it.
            Dim dom As New System.Xml.XmlDocument
            dom.Load("c:\uac\questionnaire.xml")
 
            ' SECTION 2. Initialize the treeview control.
            TreeView1.Nodes.Clear()
            TreeView1.Nodes.Add(New TreeNode(dom.DocumentElement.Name))
 
            Dim tNode As New TreeNode()
            tNode = TreeView1.Nodes(0)
 
            ' SECTION 3. Populate the TreeView with the DOM nodes.
            AddNode(dom.DocumentElement, tNode)
            ' SECTION 4. Create a new TreeView Node with only the child nodes.
            Dim nodelist As System.Xml.XmlNodeList = dom.SelectNodes("//child")
            Dim cDom As New System.Xml.XmlDocument()
            cDom.LoadXml("<children></children>")
            Dim node As System.Xml.XmlNode
            For Each node In nodelist
                Dim newElem As System.Xml.XmlNode = cDom.CreateNode(System.Xml.XmlNodeType.Element, node.Name, node.LocalName)
                newElem.InnerText = node.InnerText
                cDom.DocumentElement.AppendChild(newElem)
            Next
 
            TreeView1.Nodes.Add(New TreeNode(cDom.DocumentElement.Name))
            tNode = TreeView1.Nodes(1)
            AddNode(cDom.DocumentElement, tNode)
 
            TreeView1.ExpandAll()
 
        Catch xmlEx As System.Xml.XmlException
            MsgBox(xmlEx.Message)
        Catch ex As Exception
            MsgBox(ex.Message)
        End Try
 
    End Sub
    Private Sub AddNode(ByRef inXmlNode As System.Xml.XmlNode, ByRef inTreeNode As TreeNode)
        Dim xNode As System.Xml.XmlNode
        Dim tNode As TreeNode
        Dim nodeList As System.Xml.XmlNodeList
        Dim i As Long
 
        ' Loop through the XML nodes until the leaf is reached.
        ' Add the nodes to the TreeView during the looping process.
        If inXmlNode.HasChildNodes() Then
            nodeList = inXmlNode.ChildNodes
            For i = 0 To nodeList.Count - 1
                xNode = inXmlNode.ChildNodes(i)
                inTreeNode.ChildNodes.Add(New TreeNode(xNode.Name))
                tNode = inTreeNode.ChildNodes(i)
                AddNode(xNode, tNode)
            Next
        Else
            ' Here you need to pull the data from the XmlNode based on the
            ' type of node, whether attribute values are required, and so forth.
            inTreeNode.Text = (inXmlNode.OuterXml).Trim
        End If
    End Sub

Open in new window

0
Comment
Question by:Anthony Matovu
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
1 Comment
 
LVL 83

Accepted Solution

by:
CodeCruiser earned 500 total points
ID: 24084842
0

Featured Post

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!

Question has a verified solution.

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

Using Quotation Marks in PHP This question (http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/PHP/Q_28217211.html) seems to come up a lot for developers who are new to PHP.  And it got me thinking, "How can we explain the rule…
This article shows how to deploy dynamic backgrounds to computers depending on the aspect ratio of display
Use Wufoo, an online form creation tool, to make powerful forms. Learn how to choose which pages of your form are visible to your users based on their inputs. The page rules feature provides you with an opportunity to create if:then statements for y…
Learn how to set-up PayPal payment integration in your Wufoo form. Allow your users to remit payment through PayPal upon completion of your online form. This is helpful for collecting membership payments, customer payments, donations, and more.

728 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