Displaying Directory Tree Structure In TreeView?
Feb 26, 2010
I have something that is working for the most part, but I'm having some trouble with restricted-access folders.
The code I'm using is as follows:
Imports System.IO
Public Class frmMain
Private Sub frmMain_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
For Each drive In DriveInfo.GetDrives
[Code] .....
For testing purposes I replaced this section...
If drive.IsReady Then
PopulateTree(drive.ToString, TreeView1.Nodes(i))
End If
...with this...
If drive.toString = "L:"
PopulateTree(drive.ToString, TreeView1.Nodes(i))
End If
And it worked fine for that drive. The L: is a removable USB drive by the way.
However, with the original code I get debug errors on some folders because they are access-restricted. Is there any way to ignore those particular folders and show the rest?
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Aug 25, 2009
Is there any way of being able to read the structure of a specific directory in tree view. [code]
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Jan 1, 2010
is there a tool that can display the directory tree on a form like a treeview?
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Nov 23, 2011
I need to have tree view display a Folder View of a directory. I also Need to be able to create/rename folders in this view. Potentially even copy files to the newly created/renamed folders.
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Jun 16, 2011
Is it possible to add roots and children to the tree structure when the application is running. Im trying to build an application that has two modes - Browse and Edit. In Browse mode, I just want it to be a simple tree structure however in edit mode I would like the user to be able to make changes to the tree structure online(Add Sub Level, Delete level, create new root). Is this possible through VB alone or would I need ASP or Javascript??
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Jan 1, 2012
I'm looking for a way to create the treeview structure in memory with a classes, so I can loop through them, like with a collection and easily load the data into a treeview, listview, datagridview or simply work with the data in the background.
There's a treenode class that I could use, but I've noticed that when I have a lot of data in the nodes, it has a lot overhead when for example serializing, because it also saves the checked state, imageindex of the nodes and things like that, which I never need. The saved file is about 10 times bigger than the actual data, which is not acceptable.
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Aug 17, 2009
I would like to identify a treenode before I repaint a tree and wish the new tree paint to show that particular node in the display window.
Dim StartNode as treenode=tree.selectednode
Then perform repaint on tree from database How to scroll up to StartNode automatically.
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Dec 30, 2011
I can't find how to do it. So, I want to ask it to you guys. I have a form that had included a ListBox, a TreeView and a Button. In ListBox has a same dynamically created domain URL's Like this;
[Code]...
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May 9, 2006
I'm a developer for a College we have an active directory.I need to query Active Directory with the Pc name and return it's path in the Active Directory tree.
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Mar 28, 2009
I want to select a node from my tree view, whatever I select is going to get a record from my database, I need a unique ID in each node so it will collect the correct document relating to the selected node.
How can I do this? the name of the node maybe used more than once? Each row in my database has an ID and Title, the title is the name I guess the ID being unique needs to be tied in somehow.
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Apr 17, 2009
I have a treeview which i populate dynamically using an XML Datasource. The leaf nodes in the TreeView attempt to open a URL in an iframe within the page.This all works fine, but i would like the iframe to be hidden until the point the leaf node is selected.what event is triggered when the nodes are clicked?? I tried the SelectedNodeChanged event but this doesnt seem to get triggered!
UPDATE - The TreeView code is shown Below
<asp:TreeView ID="TreeView1" runat="server" OnSelectedNodeChanged="TreeView1_SelectedNodeChanged" DataSourceID="XmlDataSource2" AutoGenerateDataBindings="False">
<DataBindings>
[code]....
While fiddling with my code i noticed that when i remove the NavigateUrlField="URL" from my code the tree triggers the SelectedNodeChange event, But does not Trigger if NavigateUrlField="URL" is put back in.
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Mar 11, 2010
I have a webbrowser control & a treeview control...once I load a website I create a HTML DOM tree representation of the website using the code below...What I want to do now, is the following:mouse over any HTML element, which will then select the corresponding tree node on the HTML DOM Tree select any tree node and have the corresponding HTML element highlight, with a red border around it?
Private Sub UpdateDOM(ByVal HTMLDocument As mshtml.IHTMLDocument3)
TreeView1.Nodes.Clear()
TreeView1.BeginUpdate()
[code].....
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Aug 13, 2009
I am trying to find a quick, step by step tutorial on on to implement a tree view for my intranet that will show all the computer accounts in my domain. (this is obliviously only step number one, because once i can see them, I want to be able to query information from them.but one thing at a time right?)
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Apr 21, 2009
I am loading the directories from my C drive into a treeview using the code below. It takes forever due to the number of folders. Is it possible to have this only populate down 1 level and then use a NodeMouseClick Event to drill down further, in the same treeView, if the user desires to do so? How would I amend this code to do this?
[Code]...
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Apr 26, 2011
I have the below code that take a txt file as input and write the nodes of the tree at the end of the line.
[Code]...
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Dec 2, 2008
I am trying to write code to save (in a text file) a list of folders/files that are contained in a specified folder. I want the list to be formatted to illustrate the folder tree structure by indenting sub-folders and there related files according to their relationship to the base folder.
I found and incorporated a recursive function for listing file & folders. This works fine for generating the list, but I am having difficulty with code to determine the sub-directory level relative to the base folder. the code that I have included below sort of works.......The problem seeme to be when going from a folder that is multiple levels up? from the base to one that is only one level from the base. Refer to my sample output. This should not be as difficult as I seemed to have made it, but recursion kinda blows my mind.
Code:
' The following function call is in a button handler
GetFilesFolders(txtBaseFolder.Text)
Public Sub GetFilesFolders(ByVal path As String)
[code]....
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Mar 31, 2011
The General TreeView Structure, with the level indicated in the left.[code...]
Leaving the 0 and 1 levels, the other levels has to be treated as above. How to achieve this?
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May 31, 2009
is it possible to show the structure of a class in a treeview? if yes how
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Oct 28, 2011
am trying to pupulate a treeview nodes base on directory structure like this
[Code]...
The above code works for add base/parent node say i have a urllike this [URL] in this case, it should create a child node dir2 in parent node dir1 am getting confused add child nodes to the existing nodes
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Nov 17, 2009
Is it possbile to to fill a TreeView in a Windows Form with the folder structure of a SharePoint site?
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Dec 20, 2010
I'm working with a class that inherits the XElement class.The new class is called MXElement.It adds some new functionality to it for navigating through the XML tree, as well as some more information regarding attributes, but that's not particularly important.My problem is that I have an XML Tree filled with XElement objects.However, when I create a new MXElement object from the XElement object before, it is just a copy of that object. This means that any changes that I make to this object will not effect the original tree.I suppose what I'm asking for is a way to build in the functionality for my MXElement class and keep references to the original XElement objects.If possible, I would really prefer to keep MXElement a child class instead of building a lot of extension methods for XElement.
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Sep 28, 2011
I got some problems with displaying a treeview in vb2008. I want to display a company departments and got two access records: one for the top department and one for the sub-departments. The code looks like this:
TreeView1.Nodes.Clear()
ProgressBar1.Maximum = rsDepartment.RecordCount
ProgressBar1.Minimum = 0
[code]....
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Nov 30, 2011
I'm working on this app to gather some file/folder usage data. The goal is to have my object know the size of its files and children folders; at every point in the tree.My problem is; after getting the directory structure into my objects, I'm perplexed at how to get the subtotals in there.
Could I actually add the totals in when creating the trees? Or do I have to step through the tree in reverse (which seems especially confusing..I'm a novice with no computer science education; I'm sure the answer would be out there if I knew the right terminology to Google.
My classes are currnetly a bit of a mess, they've still got some half formed ideas there.
[Code]...
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Dec 3, 2008
My technical background has enabled me to learn and code a VB application quickly, but I am not familiar with the "guts" of Microsoft Studio.I want to back up my application in the event of a disc failure, but what needs to be backed up?I see that the directory structure has a in and an obj subdirectory. Do I just need to backup everything below the directory level above these two?
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Jun 21, 2010
i want to get all drives and their directories and sub-directories displayed on a tree view just as windows explorer.
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Apr 7, 2010
I am displaying all checked nodes from treeview1 like........
Private Function GetCheck(ByVal node As TreeNodeCollection) As ArrayList
Dim lN As New ArrayList
For Each n As TreeNode In node
If n.Checked Then
lN.Add(n)
Else
lN.AddRange(GetCheck(n.Nodes))
End If
Next
Return lN
End Function
It works properly. But If I prints checked nodes. Then again if I un-check any checked node from already checked nodes and now. If I print then I don't get the exact checked nodes. It still shows me previous output. What should I have to do for getting the exact checked nodes?
Selected Node
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Aug 3, 2010
When I select a node in my treeview I have no problem seeing them in my web browser.
My problem is that when I try to collapse my tree then my last viewed document in the web browser remains visibe.
How can I ensure that when I collapse my tree my web browser will also become totallt empty?
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Nov 14, 2009
I am using this code to have all the subdirectories in c:program files and i am listing them on a treeView Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
[Code]....
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Sep 6, 2009
I Created my own WebBrowser and now i have 2 questions:
1. Where can i set the directory that will be loaded in a TreeView
2. At Internet Explorer you can create a shortcut like Directory/iexplore.exe -google.nl
The browser goes to [URL] then, is there a way to do this in a VB.Net WebBrowser?
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Jan 12, 2010
Displaying an image in front of a node's caption of a treeview. i have an imagelist that contains of images and a treeview containing of nodes. I have also assigned the name of the ImageList control to the ImageList property of the TreeView control, as you can see in the following code. here is the structure of my treeview: Code: even i know that by using the image index and the selected index property i can display the images in front of the node caption of a treeview but i cant do it properly and having a few confusions.
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