Solved

how to add TreeNode to TreeNodeCollection?

Posted on 2006-06-25
1
699 Views
Last Modified: 2011-10-03
how to correctly add TreeNode to TreeNodeCollection? i have tried the following:

Dim tnc As TreeNodeCollection
Dim tn As New TreeNode
tn.Text = "TEST NODE"
tn.Nodes.Add("TEST SUBNODE")
tnc.Add(tn)

when i call this code i get System.NullRefernceException error 'Object reference not set to an instance of an object". however the TreeNodeCollection data type does not have constructors (i cannot use the New keyword). so how do i use the TreeNodeCollection? more generally, can i use TreeNodeCollection as a non-visual TreeView?
0
Comment
Question by:latsubs
1 Comment
 
LVL 85

Accepted Solution

by:
Mike Tomlinson earned 50 total points
ID: 16980764
You could always create a TreeView and just not add it to your form...

Public Class Form1

    Private tv As TreeView
    Private tnc As TreeNodeCollection

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        tv = New TreeView
        tnc = tv.Nodes

        Dim tn As New TreeNode
        tn.Text = "TEST NODE"
        tn.Nodes.Add("TEST SUBNODE")
        tnc.Add(tn)
    End Sub

End Class
0

Featured Post

The Eight Noble Truths of Backup and Recovery

How can IT departments tackle the challenges of a Big Data world? This white paper provides a roadmap to success and helps companies ensure that all their data is safe and secure, no matter if it resides on-premise with physical or virtual machines or in the cloud.

Question has a verified solution.

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

Suggested Solutions

Title # Comments Views Activity
Calling web service and its methods dynamically 2 59
VB.NET Repostiory Pattern 7 37
Crystal reports vb.net 2 41
get row value in vb.net 4 14
It’s quite interesting for me as I worked with Excel using vb.net for some time. Here are some topics which I know want to share with others whom this might help. First of all if you are working with Excel then you need to Download the Following …
Calculating holidays and working days is a function that is often needed yet it is not one found within the Framework. This article presents one approach to building a working-day calculator for use in .NET.
This Micro Tutorial demonstrates using Microsoft Excel pivot tables, how to reverse engineer competitors' marketing strategies through backlinks.
This video shows how to use Hyena, from SystemTools Software, to bulk import 100 user accounts from an external text file. View in 1080p for best video quality.

777 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