I believe this is the issue:
Here is the page:
<%@ Register Assembly="NineRays.WebControls.FlyTreeView" Namespace="NineRays.WebControls"
TagPrefix="NineRays" %>
Untitled Page
Code behind:
Imports System.Data
Imports System.Data.SqlClient
Imports System.Drawing.Color
Imports NineRays.WebControls
Partial Class TestA
Inherits System.Web.UI.Page
Dim conStr As String = String.Empty
Private Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
'Put user code to initialize the page here
If Not IsPostBack Then
BindAssetTree()
End If
End Sub
Private Sub BindAssetTree()
conStr = Session.Contents("ConnectionString")
' Create sample data
' each and every query result is assigned to this dataset object
Dim ds As New DataSet
Dim con As New SqlClient.SqlConnection(conStr)
Dim bindings As New FlyNodeBinding
' passing the query into to SqlDataAdapter for the NULL value .. means the root
Dim da As New SqlClient.SqlDataAdapter("SELECT * FROM Assets where AssetType 'No Parent' ORDER BY Id", con)
con.Open()
da.Fill(ds)
'Close the connection to free up the resources
con.Close()
' Call FlyTreeView.ConvertTabularDataToHierarchical method to convert into hierarchical datasource
Dim hierarchicalData As IHierarchicalEnumerable = NineRays.WebControls.FlyTreeView.ConvertTabularDataToHierarchical(ds, "Table", "Id", "ParentId")
bindings.TextField = "AssetType"
bindings.ValueField = "Id"
Me.flyTreeView2.DataBindings.Add(bindings)
' Bind the treeview
flyTreeView2.DataSource = hierarchicalData
flyTreeView2.DataBind()
End Sub
Protected Sub flyTreeView2_InsertCallbackNodesFromValue(ByVal sender As Object, ByVal e As InsertCallbackNodesFromValueEventArgs)
e.Nodes.Add(New FlyTreeNode(e.Value, e.Value))
End Sub
Protected Sub flyTreeView2_OnNodeMoved(ByVal sender As Object, ByVal e As FlyTreeNodeMovedEventArgs)
End Sub
Protected Sub flyTreeView2_OnNodeSelected(ByVal sender As Object, ByVal e As FlyTreeNodeEventArgs)
End Sub
End Class