#VB.NET TREEVIEW CODE#

' So if the parentId is a '', then it is the rootĭim _parentId As Integer = Convert.ToInt32(row(parentId)) ' The parentId of the TreeView's root is '' in the DataTable Node = New TreeNode(row(displayName).ToString()) ' Clear the TreeView if there are another datas in this TreeViewĭic = New Dictionary(Of Integer, List(Of TreeNode))() Public Shared Sub BuildTree(ByVal dt As DataTable, ByVal treeView As TreeView, ByVal expandAll As, ByVal displayName As String, ByVal nodeId As String, ByVal parentId As String) Private Shared dic As Dictionary(Of Integer, List(Of TreeNode)) ' And the List will restore the all TreeNode from a same parentNode ' This Dictionary will identify each List I created a new Class and used this code.

#VB.NET TREEVIEW CODE#

I was able to get this completed and working by modifying their code to work in my project. OK, I was working on some other code from CodeProject site. PopulateTreeView(Convert.ToInt32(dr('TVNName').ToString()), childNode) Private Sub PopulateTreeView(parentId As Integer, parentNode As TreeNode)ĬhildNode = (dr('TVNparID').ToString())ĬhildNode = (dr('TVNparID').ToString()) Me.TableAdapterManager.UpdateAll(Me.TvwNodesDS) Private Sub TblTVNodesBindingNavigatorSaveItem_Click(sender As Object, e As EventArgs) PopulateTreeView(Convert.ToInt32(dr('TVNName').ToString()), TreeNode) Me.TblTVNodesTableAdapter.Fill(Me.TvwNodesDS.tblTVNodes)įor Each dr As DataRow In Me.TvwNodesDS.tblTVNodes 'TODO: This line of code loads data into the 'TvwNodesDS.tblTVNodes' table. Private Sub frmTree1_Load(sender As Object, e As EventArgs) Handles MyBase.Load Please look at my code to help me understand my mistakes. I am having issues with the child nodes being populated. On the form I have a treeview control named 'treeview1' When I open the form all I can see is the Root text. I created a data source to the table, and then dragged to the form to create my bindingsource, dataadapter and datatable.

I have a sql table with 'TVNID'(autonumber/identity) 'TVNparID'(shows the identity number where it should be placed in tree) and 'TVNName' (text name to be shown) I am using VS2012 & Sql Server 2012 on Win7 圆4.

Vb.net treeview