Check To See If TreeView Node Already Populatd 1 Level Down
Jun 18, 2009
Is there a way to tell when clicking on a node in a TreeView whether or not that node already has 1 level down populated within the control? That is, I have code which populates a TreeView 1 level down. I need to put some validation code which checks to see if this level has already been populated before the code that acutally populates it.
Private Sub TreeView4_BeforeExpand(ByVal sender As System.Object, ByVal e As System.Windows.Forms.TreeViewCancelEventArgs)
If e.Node.Nodes(0) IsNot Nothing Then
What node property tells you if the node in question in a TreeView is the Root Node (i.e. highest parent level)? I want to be able to test a node (True/False) in a node event procedure.
I have a treeview with nodes being represented as checkbox.
All works fine i.e when a parent nod is checked, its child and sub child should be checked as well but it won't check only the first subchilds and i am not able to find the solution, i have debugged it many time, but still not able to figure the solution.
I tried finding the solution on the web, but didn't got the proper solution. Below is the code which i am using in my form.
Private Sub trvModule_AfterCheck(ByVal sender As Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles trvModule.AfterCheck, trvReports.AfterCheck, trvMasterAccess.AfterCheck
I was wondering how I would go about placing a check in the checkboxes for each child node of a parent node in a TreeView control, if I was to check the parent node.
For example: Parent 1Child 1 Child 2 Child 3
If I was to check "Parent 1" how would I be able to make that event place a checkbox beside all of the child nodes of "Parent 1"? (Child1, 2, and 3.)
I am trying to insert spaces between Images and check boxes on a treeview node, in a windows form app i.e. checkbox (spaces) image (spaces) node text rather than default format checkbox Image node text
Finding the level of the particular xml using a node value in .Net Experts ! This is my sample Xml.This is a tree structure and T->T.1,T.2->T.2.2,TA->TA.1 - this is the tree strucutre. I know the value of tag . ie 1232,1343.. etc.Using this ID how can I find that 1343 is coming under 1232. or 1490 is under 1090 which is again under 1232.Expected output : if i pass 1490 then I need to know 1490,1090,1232 etc (from that nodeto the top node).I am using .net 2.0
i have a treeview which has a bunch of parent and child nodes preset at design time, there is 1 parent node tho which is called developer, that i want to add child nodes to at runtime.When the form first loads im trying to have it check a text file and for each line in the text file add the text/string from that as a child node tot he 'developer' parent node.
vb Dim reader As String = My.Computer.FileSystem.ReadAllText(Application.StartupPath() & "ConfigDevs.txt") Dim strs() As String = Split(reader, Environment.NewLine) For Each s As String In strs
[code]....
Thats what i have so far, how can i set it so 'Dim parentNode As TreeNode = ' points at the 'Developer' node?
i need to check all child node when the parent node is checked and i had do research from the internet but it seem that i had a error which is Type 'MSComctlLib.Node' is not defined.do i need to import any reference? [code]
i want to add a node just above all removable drives from the thread I asked about in before. I decided that I don't want to have "C:" as a node, instead I just want my program to be the node. I've worked with this before but i can't figure it out without messing up what I already have.
I have a TreeView in my form that I populate manually from a list of items in a database. The descriptions of the TreeView items causes a horizontal scrollbar to be displayed. That is fine except that it seems that this scrollbar hides the item at the bottom of the TreeView. If I expand a tree node the bottom item that was previously hidden will be displayed.
I have a treeview with four levels; parent, child, grandchild, great-grandchild. My selectednode is at the grandchild level. What I'm trying to do is to create a new "Treeview" at the grandchild - NO, I dont wnat to create a new node to the "selectednode" (grandchild). So it should be somelike this:
I have a treeview from which I select a node, then click a button. That button adds the node to a treeview in another form. Now the node is there when I start up the form, but when I close and reopen it, its gone again. How can I keep it in the treeview?Also, how can I name the node, now I use this
I have a treeview in my program that lists all the folders and files in my TV Video collection. The tree lists as follows:
TV Series |___SeriesName
|___SeasonNumber
|___EpisodeName
The problem I am having is that the SeasonNumber node does not sort 'properly' as I would like it.
It sorts like: Season1 Season10 Season2 etc.
Instead of: Season1 Season2... Season9 Season10 etc.
I have tried this: Private Sub scanFilesList() Dim sfilenames() As String = System.IO.Directory.GetFiles(folderPath) For Each strFileName As String In sfilenames strFileName = GetFileName(strFileName) tvVideoList.Nodes(n).Nodes.Add(vGroup, strFileName, 2, 2) [Code] ..... As I understand it, this is supposed to sort ascending but it doesn't seem to change anything. I really only need to get the grandchild node sorted 'properly'.
I face a problem finding nodes in a treeviewActually I want to duplicate a node (mynode) in my treeviewSo I want to search all the nodes to find similar nodes and count them and then when I will create the new node I 'll add a number at the end of its name
I am trying to rebuilt the BOM system from an existing BOM application. The table i used was the existing table and cannot be modified as it is contain around 20000 of part no there.What i am going to achieve is the structure view of the BOM using the treeview control. I want it to have as many nodes as the BOM required which different from one to other part no.Here is the structure of the table.
I can't work out how to add nodes to a treeview as a child of a particular identified node.
The treeview.nodes.add function has seven overloaded definitions each of which seem to add it as a child of the root node. I can't find a way to specify the parent.
I've found this article which gives an example
TreeView1.Nodes.Add , , "root", "Root Item" TreeView1.Nodes.Add "root", tvwChild, "child1_root", "Child1 of Root" TreeView1.Nodes.Add "root", tvwChild, "child2_root", "Child2 of Root" TreeView1.Nodes.Add "child1_root", tvwChild, "child1_child1", "Child1 of Child1"
I've seen several similar articles with the same format. However this doesn't work. I get compilation errors. It doesn't match any of the function definitions, and tvwChild is not recognised as a constant.
Over the last few weeks i have been trying to add a final level of nodes to my treeview from databases.Within each database is the title of the next node and the key of the node, the child nodes are linked to the parent nodes by the row number/ID column.That is my scenario.
Now comes the next "challenge" At the moment in my code i have had to take out the parts that cycle through each database to add the children as it was causing an error that is described (Learn how to insert hyperlink) here: [URL].. So to overcome that i removed it (dumb approach i know) My justification is that i wanted to see if "my" code worked to add all levels of the nodes. But instead of having All the nodes that should be visible, i only have all the last ones: heres a 'picture to show'What i have below; Whereas all the parents should have children, all the children grandchildren and the grandchildren greatgrandchildren.
I have this code to select first node of TreeView. But when page loads the by default root node is other than first, I want to set the selected node as top most by default. Here is my code in page load but it's not working:
Dim nodes As TreeNodeCollection = TreeView1.Nodes If nodes.Count > 0 Then ' Select the root node TreeView1.SelectedNode = nodes(0) End If
This gives the blue underline error on this line:TreeView1.SelectedNode = nodes(0)
The error is: "Selected Node Property is read Only"
I am now trying to get grandchild nodes in my treeview, i have got everything working, BUT instead of the nodes being put 'IN' the child node they are being put 'BELOW' it.
