Solved

Adding a FullPath method to the TreeNode object of the TreeView object

Posted on 2004-09-18
4
1,484 Views
Last Modified: 2008-02-01
Dear Fellow Human,

I am creating a TreeView that is linked to the filesystem.

I am using ASP.NET and the Treeview object.  I created an expand event that passed through e As TreeViewClickEventArgs.

I can inspect e.Node to get the "nodeIndex" i.e. "0.0.0" etc.

I can also
     Dim expandNode As TreeNode
     expandNode = Tree.GetNodeFromIndex(e.Node)

In VB.NET (Windows Forms), the TreeNode object has a "FullPath" method.
In ASP.NET (Web Forms), the TreeNode object does not have this method.

So I had to write a Function to take a nodeIndex e.g. "0.0.0" and convert it to the FullPath.  This wasn't very elegant.

Dim FullPath As String
FullPath = TreeNodePath(expandNode.GetNodeIndex)

Here is the function, skip past this for more information.

 Function TreeNodePath(ByVal nodeIndex As String) As String
        Dim i As Integer
        Dim fullPath, currentIndex As String
        Dim indexArray As Array

        ' split the nodeIndex path, usually nodeIndexes are of the form 0.1.0 or 0.2.1
        indexArray = nodeIndex.Split(".")

        For i = 0 To indexArray.GetUpperBound(0)
            If i = 0 Then
                ' this will be the root node
                currentIndex = indexArray(i)
            Else
                currentIndex += "." & indexArray(i)
            End If

            If i = indexArray.GetUpperBound(0) Then
                ' last node so don't have to add a "\"
                fullPath += Tree.GetNodeFromIndex(currentIndex).Text
            Else
                fullPath += Tree.GetNodeFromIndex(currentIndex).Text & "\"
            End If
        Next

        Return fullPath
    End Function

What I would like to do... is somehow add the TreeNodePath function to the TreeNode object of the TreeView object.  I would probably rename it to "FullPath" to keep it in line with the VB.NET TreeNode object (Windows Forms).  

I know that the new version of the TreeView object in ASP 2.0, will most likely have this method available in the TreeNode Object.  

However, I want to improve my coding skills, and understand how I could merge extra methods into existing objects.

Is this possible?

Kind Regards,
Dave Kirkby
<email removed by mmarinov .NET Topic Area Page Editor>
0
Comment
Question by:tidydave
[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
4 Comments
 
LVL 28

Accepted Solution

by:
mmarinov earned 500 total points
ID: 12097205
Hi tidydave,

You have to create your server control, that inherits the Treeview control as a base an improve it
then you can add your method, and from this moment you can use the new created control, and not the original one

B..M
0

Featured Post

Technology Partners: 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

IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
International Data Corporation (IDC) prognosticates that before the current the year gets over disbursing on IT framework products to be sent in cloud environs will be $37.1B.
The Email Laundry PDF encryption service allows companies to send confidential encrypted  emails to anybody. The PDF document can also contain attachments that are embedded in the encrypted PDF. The password is randomly generated by The Email Laundr…
I've attached the XLSM Excel spreadsheet I used in the video and also text files containing the macros used below. https://filedb.experts-exchange.com/incoming/2017/03_w12/1151775/Permutations.txt https://filedb.experts-exchange.com/incoming/201…

733 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