How could I create something like a TreeViews' Node collection? I'm really not sure what to search for in this case.Presumably, you have something like an array of TreeNodes, and then the NodeCollection class implements IEnumerable, is that correct?
View 10 Repliesway to return a collection of treenodes which are children of a selected node? I can't find on MSDN a object of treenodes that is a collection of childnodes.
I have two treeviews, and I am writing code that will copy treenodes from one treeview to another treeview if it is selected. If a parent node is selected, I would also like to copy over all the children. If it is just a childnode, then I would like to copy just that.
Here is what I have so far.
Dim treeobj As TreeNode
treeobj = TreeView2.Nodes.Add(TreeView1.SelectedNode.Text)
If TreeView1.SelectedNode.Parent.Index.ToString Is System.DBNull.Value Then
[Code]...
treeView control which has been plaguing me for the last few days.
I'm not exactly sure what is causing this problem to arise, so I will just explain what my program is trying to do.
I am building an application which will have plugin support. I have created a Plugin interface, which is implemented by each plugin, as well as a host interface, which is implemented only by the host application.
Each plugin has an Action subroutine, and when finished, it is supposed to call the ExecutionComplete subroutine in the host interface.
Now, onto the problem. I have a treeView on the host form, which has several nodes in it. If I create a button on the form which displays a message box with treeView.nodes.count, it shows up fine, and everything works as expected. If I attempt to display the same messagebox from the ExecutionComplete subroutine, it also gives the correct number of nodes.
This is where things get a little weird. I have implemented a save feature into my program, so you can save and load data. For some weird reason, if you have loaded the data from a file, rather than adding each node manually, it now returns an empty node collection ONLY if I try to access it from ExecutionComplete. If I try to access the nodes from a button, it still returns the correct values!
What could it possibly be about the ExecutionComplete subroutine that makes it return a value any different than what is returned when the exact same code is placed in a button click event? And why does it only happen when I've loaded the data from a file? I just don't understand how loading it from a file is any different than them adding the nodes manually. The nodes are definitely being added, as I can see them, and the button click event can also see them. Also, ExecutionComplete is obviously able to read the contents of the treeView, because it works just fine if the user has set up the treeView manually.
Here is my situation:
I have a TreeView (TreeView1) on the left part of the screen with computers, then I have a list of files on the right side in another TreeView (TreeView2). I would like to drag a file from TreeView2 to TreeView1 and copy the file from the local machine to that other computer.
Now I have the code in a separate function to do the file IO, so all I need to know is how to do the drag and drop..
I'm new to this Visual Basic stuff. I have TreeView under the name of TreeView1 and it has two Parent nodes, one is Library and the other is Store. Under Library and Store I have childnodes and thats were I'm stuck. For example under Store there is Downloads and Apptrackr.
What I want is when a user clicks on Apptrackr it runs this piece of code
WebBrowser1.Visible = true
DownloadsBrowser.Visible = false
And when the user clicks on Downloads it then does the opposite
WebBrowser1.Visible = false
DownloadsBrowser.Visible = true
I have an xml file with following structure:
<table name="tblcats">
<row>
<Id>3680</Id>
<Industry>Associations</Industry>
[code]....
I want to create a treeview using this XML file. I have written following code
' Load a TreeView control from an XML file.
Private Sub LoadTreeViewFromXmlFile(ByVal file_name As String, ByVal trv As TreeView)
' Load the XML document.
[code]....
where as I want table as parent element like this
->table
->Associations
->Fortune 100
so that If i click table node, all tree collapses or expands.
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
example how to create a right click on selected node in tree view..example
parentNode = mdiform
childnode1 = child form1
childnode2 = chile form2
which ever i select a different node a corresponding form will appear with a mouseup event.
i must choose first a node to view my contextmenu.
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?
View 1 RepliesI've a treeview in my project form which look like this.
-Cover Page
-Video1
-Podcast1[code].....
The user will be able to upload their pages to the respective pages nodes and I am suppose to make it in such a way that after the user uploaded the cover page which is showing at the PictureBox1 which I've use to display the image, and when he uploads the second page image at the PictureBox1, the Cover page image that he uploaded earlier on will not be overwrite.
I was told to create class and use array to store the contain in the respective nodes but I do not have any idea how to do it.
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?
Is there a way to create a collection of collections? e.g. I created a collection ListOf(Lines) After I add all my lines to it, I want to store this colleciton in another listOf(Collections). The reason I want to do this is because i want to create several separate collections of lines and I'll need to loop through them all to look for a certain line and I thought this would be a good approach if it's possible.
[Code]...
I have class called "Employee" and I have a class called Department. They have an association. I need to create a colleciton of employees with the creation of a Departmant. I know how to do with using "private" member _AllMyEmployees. But I need to expose this private member using properties. therefore how do i covert thsi private member to a property? [code]
View 2 RepliesI have a tree view in my project with a parent node and with theoretically speaking infinite child nodes.
Now I want to delete the last child node from the tree view when the user presses a certain button. I thought I could do this trick with this code:
Private Sub Bundo_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Bundo.Click
Try
[Code]....
I have a treeview which have a listimage. And it has imageselectindex property (image is yellow ball)My problem is : When i click any node, the image of that node shows imageselectindex . I only want thirth child node will show it. I dont want when i click at first node (rootnode) or child of roodnode , the yellow ballon shows.
View 9 Repliesi 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]
View 4 Repliesi got treeview with some root, parent and leaf node but when i create a foreach loop it alway read the 1st value with is 4
For Each node As TreeNode In Me.TreeView1.Nodes
'Label1.Text += node.Text & "</br>"
If (Not node.Checked) AndAlso (node.Value = module_id) Then
[code].....
My XML comes in like this:
<Document type="ContentPage">
<Fields>
<Field name="FaqCategory" type="dropdown" title="Select Category:" index="FaqCategory"
[code]....
Working on a project that tests up to 16 PC boards. The test routines are on a a backgroundworker thread. I want each PC board to perform the test routine on its own thread, so I would need up to 16 backgroundworkers.How do I go by doing this? Do I put 16 Backgroundworkers on the form? I tried to do it programmatically but I can't declare an array of backgroundworkers because withevents variables can't be typed as arrays. I guess I just need a kick in the right direction.
View 8 RepliesI have an issues creating Collections with Schedules, it creates the Collection, but it does not update membership as the schedule is blank [code]...
View 5 RepliesI have a collection of objects in vb.NET. Each object has two different IDs, lets call them ID1 and ID2.
I need to be able to quickly find a specific object in the collection based on one of these IDs. In some cases I have ID1 and in other cases I have ID2. I'm currently using the Collection data structure with ID1 as the key, but that doesn't help me when I need to find an object using ID2.
I'm writing a program that takes all files and directories on a computer and puts them in a collection, where I add a collection to the Collection for a directory with the key being the name of it and a string containing the Name for a file under the collections added I do the same,
[Code]...
I am trying to maintain a total for multiple collection objects in a class. When I create a new object, it resets the total to zero, only adding the current value being passed to the function. I have tried to use a static variable, create a second variable to hold the old total while adding the new value. The base class holds the total value, while the sub class creates the new object that holds information. I am passing the new value to a function in the base class adding the new value to the total when each new record is created.
[Code]...
I got a blank, how do I create dynamically a number x of collection?
View 7 RepliesI'm trying to create a collection of variable binding in a class.It is intended to look something like this:
Dim x as integer, s as string
Dim c as new VBindClass
x = 1
s = "Hello"
[code]....
Is there some function that allow us to retrieve a unique ID for a given variable and also get/set based on variable?
Update:At last, I've managed to found the answer. Here's the code:
Dim gh As Runtime.InteropServices.GCHandle = Runtime.InteropServices.GCHandle.Alloc(obj)
Return Runtime.InteropServices.GCHandle.ToIntPtr(gh).ToInt64
How would I create a function to return one database row in a collection, such that the rows column name & value are stored as key/value pairs in the collection?
View 5 RepliesHow to create collection class and add list of items to collection class that stores list of items?
View 3 RepliesI have a problem that can be best solved with LINQ. I have a class that has 2 properties of which 1 is a single. I have a collection of that class and I need to select the instance with the highest single value.[code]I'm having a hard time explaining this even this is a simple task. Please ask if you don't understand.In addition to my original question, How would I create a collection containing the 5 highest Instances.
View 2 RepliesI want to create some type of list or collection. Each item on this list or collection will need contain A string name and a integer value. Something like
[Code]...
How to add a child node to a specific node in treeview?
Say i have "Item1" in treeview already, How do i add "SubItem1" to "Item1" as it's child node?
I know its probably really simple, but i tried lots of stuff, i just cant get it working.