How to create a TreevView from XML
XML is a self describing language and it gives the data as well as the rules to extract what the data it contains. Reading an XML file means that we are reading the data embedded in tags in an XML file.
In the previous example we already saw how to read an XML file Node wise. Here we are reading XML file as Node and pass the Nodes data to TreeView.
Imports System.Xml Imports System.io Public Class Form1 Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click Dim xmldoc As New XmlDataDocument() Dim xmlnode As XmlNode Dim fs As New FileStream("tree.xml", FileMode.Open, FileAccess.Read) xmldoc.Load(fs) xmlnode = xmldoc.ChildNodes(1) TreeView1.Nodes.Clear() TreeView1.Nodes.Add(New TreeNode(xmldoc.DocumentElement.Name)) Dim tNode As TreeNode tNode = TreeView1.Nodes(0) AddNode(xmlnode, tNode) End Sub Private Sub AddNode(ByVal inXmlNode As XmlNode, ByVal inTreeNode As TreeNode) Dim xNode As XmlNode Dim tNode As TreeNode Dim nodeList As XmlNodeList Dim i As Integer If inXmlNode.HasChildNodes Then nodeList = inXmlNode.ChildNodes For i = 0 To nodeList.Count - 1 xNode = inXmlNode.ChildNodes(i) inTreeNode.Nodes.Add(New TreeNode(xNode.Name)) tNode = inTreeNode.Nodes(i) AddNode(xNode, tNode) Next Else inTreeNode.Text = inXmlNode.InnerText.ToString End If End Sub End Class
Click here to download the input file tree.xml
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