I'm running out of walls to bang my head against. Okay new windows form with a textbox, button and TreeView Populate the TreeView.nodes with the default nodes via properties
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I want to click button1 and have the name of the childnode? Node3? placed in the textbox. Not via selection, I can do that. But via index or item number. The code I have is as follows
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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.
I have a problem with my treeview. I have two child nodes with different parents which contains a literal (*x). In this case (*1) (view image)
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I am trying to populat a treeview with nodes that are the values of a column in a datatable. I have managed to get the correct number of nodes but the text is not displayed next to the nodes, there is just a 3 shape but the other way round and with square corners shown.
The code is below. I would like to have these parent nodes populated on the form load and then (i think this is what i have read) to be quicker i would like to then load the childnodes once a parent node has been selected, as i don't want to load the whole database on form load or when the form is refreshed.
Here is the code with more dtails below:
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i have a treeview which is databoud to a access dataabse, the database has 1 table, and the treeview shows everyname from column 2.
What im trying to achive is for the treeview to also display the names from column 5 and 6 as child nodes of the name from column 2. Been tinkering all morning to no luck, googles not finding much int he way of working examples, just lots of garbage.
I have a treeview that is populated from a HDD folder collection. Its structure is similar to the following (however the structure is dynamic):
My Disk:
|
|--folder1(tag:folder)
| |--subfolder1(tag:folder)
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I call the sub as follows:
deleteNode(treeview1.Nodes(0).Nodes)
However, the above is not working properly. It deletes only some nodes and not all the targeted nodes.
how to add treeview nodes and sub sub nodes using functions
View 1 RepliesI have a form with a treeview control (trvControl) which is created at design time. I have a sub which creates a temporary treeview (trvTemp) and adds a bunch of nodes to it. It then uses treeview.nodes.copyto and treeview.nodes.addrange to copy these nodes to the control on my form:
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It all seems to be working except for one thing - nothing appears in trvControl.
I've run through the code and the node collection is definitely getting copied (I paused in another sub and checked trvControl.nodes and it was correct) but trvControl is still empty on my form.
Incidentally, the reason I am doing this is that I want to use a background worker to populate the nodes but don't want my app locking up for large amounts of time while I access the treenode through an invoke so I thought if I generate the node collection first and just use the invoke to load it into the array it would work better.
i have a treeview say TV1 and another Treeview Say TV2.. Now TV1 Contains all nodes for user rights. and i want to add to tv2 only selected nodes.Like TV1 is
Node 1
....Child of Node 1 (Level 2)
.........Child of Child of Node 1 (Level 3)
what i want is that when i select Level3 Node it should chek TV2 for the parent of this node. if parent exist it should add the node under the same parent. if parent does not exist it should check for Level 1 Node and if it exist it should add Level 2 Node and then Level 3 Node. Otherwise it should add Level 1 , Level 2 and then Level 3 Nodes in order.
I am not sure I am getting the concept of referencing nodes in a treeview. When I hard-code nodes like:
tnParentNode = New TreeNode("ABC")
tvReports.Nodes.Add(tnParentNode)
tnParentNode = New TreeNode("Some Other Company")
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I get two parent nodes and one child off Some Other Company. However, when I pull information from a couple of tables to set up the parent and then the child nodes, I only get the parent nodes.So I pull the main parent nodes from one table and the child nodes from another table.This code pulls the parent nodes without any problem:
strSQLText = "SELECT lID, sCatName FROM Category ORDER BY iSortOrder DESC"
reader = GetReader(strSQLText)
While reader.Read
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But this does not add the child nodes. I am assuming it is because of the first line in the above reader.read while loop. I must not be referencing the proper parent node but I am not sure how to do it.
I have a treeview. The root nodes have images set at 30x30 - is there a way to add child nodes with NO image or a smaller image? I can do a blank image, but each child is spaced far apart! I would like the child nodes to be like there is no image... tight and close to each other.
View 13 RepliesHow 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 have the below code that take a txt file as input and write the nodes of the tree at the end of the line.
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Following is the code for TreeView in XAML:
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I am able to get the pnode added to the TreeView and all the node breakpoints are hit. The problem is that in the TreeView, I am only able to see the parent view arrow, the rest of the name, image, etc. are not getting displayed. It is like this: How can I fix this?
I'd hate to have to create my own control, but will attempt to if it comes to it.
I need to display columns within a TreeView node so I can display specific information about that item within columns.
Think of a ListView as a TreeNode. That's basically what I'm trying to get at.
I'm hoping for a relatively easy solution, but I can't imagine this would be too easy.
I am trying to add nodes to a treeview that come from different databases, but at the moment i am just trying to add the first set from the first database.
The link between the child and the parent is the ID column in the parent nodes access database this number is in a column in the child database called Section, i am trying (unsuccesfully) to use queries and If statements.
I am assigning the ID column from the parent database to the .Tag property of the parent node and then i am trying to use an if statement within the query "asking" if the parentNode.Tag = number in section column Then Add new node, but i haven't done it right. The code is below:
While RetVal3.Read
If RetVal3(0).ToString = SectNode.Tag.ToString Then
Call AddCalcNodes(SectNode)
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quick question, i have two treeviews and what i want to do is be able to click on a node in one and have it added to the other. This code doesn't error but it doesn't seem to be doing anything. am i missing something wrong?
Private Sub tvdwindexes_Click(ByVal sender As Object, ByVal e As TreeNodeMouseClickEventArgs) Handles tvdwindexes.NodeMouseClick
' Clicked on an item in th etree view.
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I have a TreeView such as this
1
2
2a
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And I want to when I press a button disable 2 and 4 (with all its child nodes).
I am trying to add some items to a TreeView Control:
TV1.Nodes.Add("key1", "Test1") 'Works
TV1.Nodes("key1").Nodes.Add("key2", "Test2") 'Works (Nested)
TV1.Nodes("key2").Nodes.Add("key3", "Test3") 'Error (NullReferenceException)
i have tree view controand i want To select all nodes of tree view
View 2 RepliesIs it possible to have more than one level of child nodes in a treeview? fore example can i have:
node1
-node2
--node3
---node4
right now it only lets me have
node1
-node2
node3
-node4
and also if it is possible how would i enable it?
I'v got a problem with two treeviews. I'm populating a treeview from a Backgroundworker which isn't visible, after that I want to move or copy al the nodes in that Treeview to the Treeview on my form since you can't add nodes directly to a Treeview on your form from a backgroundworker. Does anyone know how I can transfer them? I tried things as .Copyto and .Addrange, but I couldn't get it working.
View 4 RepliesSo, I have a treeview populated like so:
-Processors
--Name1
---folder1
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I have a 3 layer treeview and is using the code below. I am getting it to do the following,
1) If parent is checked, check all child nodes.
2 If just one child node is unchecked, uncheck parent node.
3) If all child nodes are checked, check parent node.
Code below only works for 2 layers. Would appreciate if you can guide me how to make it three. There are much information on treeview but most of them seems irrelevant =/ Will be great if you can show me a good guide on treeview control.
Private Sub TreeView1_AfterCheck(ByVal sender As Object, ByVal e As TreeViewEventArgs) Handles TreeView1.AfterCheck
RemoveHandler TreeView1.AfterCheck, AddressOf TreeView1_AfterCheck
For Each node As TreeNode In e.Node.Nodes
node.Checked = e.Node.Checked
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I have the following code which checks for the value of the 'cc_supplier_status' column for each of the rows in my table. If the state is 0, I need a child node to be added to a node named 'Inactive Suppliers' in my tree view (tvw_Supplier) with it's text being the value of the 'cc_ supplier_ name' value for the same row.If the state is 1, a child node is to be added to a node named 'Active Suppliers'.If the state is 2, a child node is to be added to a node named 'Pending Suppliers'.The code I have now just filters out the status value for each row, and performs a select case on it. I need to know how I'd add a new child node to the parent nodes mentioned above.[code]
View 2 RepliesIs there anyway to change the nodes in a treeview to arrows? and checkboxes for only the children of the root node?
View 15 RepliesI'm trying to create nodes from a .sdf database according to a specific value in a combobox.[code]...
View 2 RepliesI'm begining to use the treeview control in vb 2008 and I use this line of code to create new nodes at runtime
Treeview1.Nodes.Add("New Node")
my problem is when I close the application and open it once again the nodes I created does not exist, how to rename nodes at runtime?
How can I export treeview nodes to xml file in vb.net? My treeview nodes like below:
History
- Date 1
- child 1
- child 2
- Date 2
- child 1
- child 2
I am playing with rename nodes in a treeview. My problem is that I have a contextmenu with shortcuts and I have apply the Del button for deleting a node. So, when I am editing the text of a node if I press Del to delete some errors I delete the node. Is any way that I can disable the shortcuts during the label editing and enable them afterwards?
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