Treeview Not Checking ALL Children
Aug 24, 2010
Im new to treeviews so I hope this is not posting a problem that has been covered. I want all the children of a checked parent to also be checked. I have found various snippets that can achieve this but only for one or two levels. When I expand further than 2 levels the children are not checkeds. What am I missing? I have managed to find this piece of code that I am using in both the "AfterExpand" and the "AfterChecked" events to achieve the result. There must be a better way.
[Code]...
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Apr 16, 2010
I'm trying to msgbox all the children nodes that exist in a treeview, however i was not able so far to msgbox except the first nodes in the first level of bracnching in the treeview, i want to go more in depth & msgbox all the children nodes.
Dim child As TreeNode For Each child In TreeGraph.Nodes("A").Nodes MsgBox(child.Text) Next child
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Apr 13, 2011
I'm working on a drag-and-drop method to copy items from a listview control to a treeview. I've got the drag and drop working, but I'm hoping to limit the ability to drag items that create a child of a child. Ideally, if someone drags an item from the listview to the Treeview and the drop the listview item over a child, it would drop the dragged item to the parent.
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May 11, 2010
To set the checked state of the child node to its parents node i used this code.
mycode
vb
Private Sub CustomerFields_AfterCheck(ByVal sender As Object, ByVal e As System.Windows.Forms.TreeViewEventArgs) Handles CustomerFields.AfterCheck
[code]....
I also found the following code on msdn. Whats the difference b/w the two. Both of them works
vb
Private Sub CheckAllChildNodes(treeNode As TreeNode, nodeChecked As Boolean)
Dim node As TreeNode
For Each node In treeNode.Nodes
[code]....
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Jul 3, 2009
I have a TreeView populated with some nodes, and some of those nodes have children. Is it possible that when the node, or child is selected that the entire node including the children be selected? I still want to deal only with the value of the root node, but for the UI I want the root + children to be selected.
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Mar 28, 2009
How can i programmatically create a treeview consisting of several nodes and each node has several children.I want to read the nodes and children from a table and fill them accordingly, so how can i do this?
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May 17, 2009
I have this code..
If Form1.ListBox1.Items.Count = 0 Then
Else
Dim classSS3 As New StringSift3
Dim ReturnVal As Single
[code]....
What im trying to do is the returnval works its a compare percentage, dont worry about that. lb1 is the index of listbox1.selecteditem which is the first item, im trying to make it check the childnode for each root node in the treeview.but i get an error on.Form1.TreeView1.Nodes(Form1.lb1).Nodes(classItem).checked = True saying..Object variable or With block variable not set.
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Jul 6, 2011
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.)
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Aug 31, 2011
I'm all new to this treeview business. I have a fixed treeview, very simple and basic. Only two levels, parent and child nodes. I just need two things out of this treeview.
1) If parent is checked, check all child nodes.
2) If just one child node is unchecked, uncheck parent node.
That's it! I've been looking for this for 30 mins and I cant find it. Maybe because my vb.net is old, it doesnt seem to be the same as others =/ I'm using vb.net 2003.
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May 14, 2011
I have a problems with my application..
1. collapse and expand treeview when i click plus sign (+) on treeview, treeview didn't expand subfolder but when i click image, treeview expand it.
2. showing path that i check on treeview when i check the treeview then i'm click the button, then return path that i check
This is my code..
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Aug 4, 2010
Is there any better performance by checking for a true value like this:
[CODE]..............
Than like this:
[CODE]..............
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Mar 2, 2010
i have a treeviev and listbox.i want to display the selected contents of treeview into the listbox.my code is working for file but not for folder. means i want, if the all contents of folder ABC(i.e all files) are selected then in listbox i want to show the only path of folder not the seperate path of each file.
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Apr 15, 2010
Is there a simple way of tracking the change of an Mdi's children i.e. when they are created and closed, something like an event OnMdiChildListChanged (I realise this doesn't actually exist).
I am also aware that I could have a method within my Mdi that handles the creation of child forms and logs the state of them or even create an Interface that defines that a child form has a "NotifyParent" method that is then called on close of the form, but i was wondering if there was any built in events that i could plumb into?
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Aug 17, 2009
How do you get the children of a panel?
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Jun 3, 2011
I have four children in a parent container. Each child form is a test for the user to type correct answers into text boxes. Option to open each form is on a menu strip in the parent. In form load, I have disabled all but the first form option. I only want the second form to become available if the first form answers are correct. I would like to figure this out on my own as much as possible. I have searched on line but since I am not sure what to ask, I have not found and answer. Can someone get me started in the right direction? Perhaps some reading that would explain how to go about this, or what I should be typing into google to get what I'm looking for.
[Code]...
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May 6, 2012
[code]...
I'm sifting through the dump of AniDB titles and everything works except that it only sees 7161 elements instead of 9200. Anyone have any idea why? It's not calling an exception on the load method as if something is wrong. Even when I change it to just take the root element and then get the count of children, it gives 7161. Like it doesn't even see the last 2000.
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Jun 3, 2011
A common problem I have come across when migrating from VB6 to VB.NET is that to change the focus between MDI children, you can't just click any control to give that child focus, you must click its title bar. The solution that I have found works is to enter the child form's Designer and change the following:
Code:
#Region "Windows Form Designer generated code "
<System.Diagnostics.DebuggerNonUserCode()> Public Sub New()
MyBase.New()
'This is required by the Windows Form Designer.
InitializeComponent()
[Code] .....
This needs to be done on all child forms in the project. If one form does not have the fix, once it's opened, the bug will return even when the form is closed.
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Dec 12, 2010
I would like to turn on an app in the background that disables or temporarily remaps all but the alphanumeric keys while they are using my laptop if possible.
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Oct 31, 2011
I start with VB 2010 since a short time.I need to check in a Treeview if a node has children or not.In VB 6 there was the property clildren that allow to understand this.
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Apr 20, 2011
I'm trying to remove all children (and sub-children) of a Grid in WPF (I'm really new to the whole WPF business). Is there a good way of doing it programmatically? I need to do this so that I could leave an empty canvas (Grid) at one point and draw other stuff on it.
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Apr 29, 2009
i make a parent and children form and when i show children form and drag into parents form , when parents is little to show the children form , parents form enables the scrollbar and then show the chilren form better , how can i do something that avoid this status ( don't show scrollbar into parents form when the children form is bigger than it)?
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Oct 1, 2011
I'm adding rectangles to a wrap panel like this:
For i = 0 to 20
wrapPanel.children.add()
next
I would like to use this loop because I don't want to specify the limit:
Do
wrapPanel.children.add()
Loop
But how can I break the loop when the wrap panel is filled? For example the loop would stop when the wrap panel can't display a rectangle in its full height or width.
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Aug 19, 2010
From code analysis (Visual studio), I got this warning:
[Code]...
The warning disappear but then the literal control isn't anymore being displayed on the page... EDIT Note that the code come from a Microsoft web page: [URL]
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Nov 3, 2011
I need to modify a xml file (actually a .rdlc report file) and add some nodes which have a lot of children nodes (and those children nodes again have children nodes). Actually they are almost the same strucutre, like this one:
<TablixRow>
<Height>0.23622in</Height>
<TablixCells>
[Code].....
and it will add my specified NS. (like I said, XElement.Parse(string) won't add it) So now I can construct the correct node. For my second problem I still can't figure out: I can't navigate to the target node by using the element name since it won't search for correct NS.
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Dec 22, 2011
My application creates MDI Children programatically. I have a frmBrowser as an MDI Child which I create multiple instances of. There are several other MDI children in the MDIParent. How do I only cycle through the frmBrowser MDI children?
For Each Child As frmBrowser In frmMain.MdiChildren
'perform action on child
Next Child
The code above gives an error for all the Child that aren't of the type frmBrowser.
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Oct 28, 2009
I have two mdi children forms open. I would think that clicking on the non active form would change the focus from the active form to the form I just clicked on. It only does this if I click on the title bar. Then the focus changes. But if I click on a control on the non-active form, focus does not transfer.
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Apr 17, 2012
I have a WPF ParentUserControl and some ChildUserControlA ChildUserControlB etc. (also WPF controls)
The ChildUserControls are controls containing on them some other basic elements (textboxes, labels, etc)
In the main form's status bar I need to display the name of the currenlty mouse overed ChildUserControl.[code]...
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Oct 22, 2011
I want to make something similar to the listbox.children property. I know I can write this to return the children of the listbox:
[Code]...
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Feb 9, 2010
I have an MDI application that shows a child window, obviously. I want multiple instances of this child window to be possible. However, I only get one. The first one will close out and the new one will show.
Dim newWindow As New frmWatcherWindow()
newWindow.MdiParent = Me
newWindow.Show()
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Dec 17, 2011
One would imagine that clicking anywhere within the MDI Child form (or on any control) will focus that form. But in my application I can only focus a MDI child by clicking on its titlebar, which is an abnormal behavior on the part of the user. My forms are filled with either controls or panels so I don't have the luxury of just "clicking on the form." But clicking anywhere within it should focus it.
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