Forms :: "Locking" Characters When The User Edits A Treeview Node's Text
Jun 9, 2010
I have an application where I'm allowing the user to edit the text of a treeview node. Is it possible to "lock" portions of the node's text to keep it from being edited?
For instance, if the text is "BK01" originally, can I keep the user from editing the "BK" prefix?
I currently validate the user's input when they are finished editing, but I'd like to keep them from entering incorrect information to begin with.
I used both parent node and child nodes in a Tree View in visual basic 2010. Now I want user could delete a parent node if selected it or any of her childs nodes and user cant be able to delete a child nodes. How can I do this?
I have been working with VB 6.0 for years. I am converting an app that uses treeviews to VB.Net 2008. The way it use to work the tree grid started with a list of the drives on the system. Left click drilled down in the selected drive or directory. Right click would perform an action with the selected drive or directory. In VB.Net it appears you can only select with left click using the AFTERSELECT event. Is there a way to select a node with right click?
Is there any way not make a Treeview (windows forms) Node gray it something exactly like how a particular folder turns into when we click on Ctrl+X on a folder in windows explorer. I tried with changing the backcolor but that not is like exactly I want.
I have a treeview with several nodes I would like to know how I can display different screens when the user selects the nodes: just like switching through tabs.Regards Rimzy
I have a TreeView that I am using for display purposes only. I don't want the user to be able to select any of the nodes. Setting the enabled property of the form to False doesn't suffice since it changes the entire look of the nodes.
I tried canceling the select action in the BeforeExpand event. It kind of works. It selects, then de-selects the item. I'm going to play around with other events to see
I have TreeView Populating from Database And I am Trying to detect the user action on treeview to make some decision that whether user has clicked on Parent node or Child node or child of a child node.Please any one help me to do this that how can i detect the user action on treeview
I'm developing a windows application. I have a form in which there is a list box and a treeview control. My purpose is to fill treeview according to list item clicks. This is done using a pair of subroutines called ReloadPermissions and FillMenuItem:
Private Sub ReloadPermissions() Dim p As New Permissions Dim i As Integer Dim it As TreeNode Dim el As New List(Of String)
[Code]...
There are only two subroutines in which nodes are added to treeview control, and they are subroutines above. The problem is that whenever list item is clicked, node count displayed in treeview is increased!!! I checked number of nodes before and after call to tvPermissions.Nodes.Clear() using MsgBox. Results show that number of nodes isn't increased (1 before call, 0 after call, again 1 after ReloadPermissions() is called), but what is displayed doesn't show such a behavior! Refreshing window by putting it under other windows or call to tvPermissions.Refresh() has no effect.
I have been playing with, and researching, this all day and can't figure it out. I have a Windows Explorer style form with a TreeView and a ListView. I've populated the TreeView with directories and when a node is selected, the ListView fills with the contents of the directory associated with that node. No problem there, but I want to be able to select a directory in the ListView and automatically select the associated node in the TreeView, just like it works in Windows Explorer. All the information I've found online tells me how to populate the ListView from the TreeView, but I haven't found any good examples of how to populate the TreeView from the ListView.
1. I need to be able to store the STR MG INT and SPD somewhere when they create an item and make sure it is assigned to that item, and since I allow them to create unlimited item, I need this way to be dynamic (as in create variables as needed).
2. I need to find some way to make sure the user has selected an item name in the treeview (not type or main node).For example, they need to click Hockey Mask and then click the equip item button for it to work?
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
I have a treeview on my ASP.Net page and for some reason the text on some nodes gets cut off, I am programatically adding all the nodes and am aware of the existing issue listed here: [URL] however I am not changing the font and as you see in the code below this fix does not work for me.
Private Sub populateTreeView() 'Code that gets the data is here Dim ParentIds As List(Of Integer) = New List(Of Integer)
[Code]....
The strange thing is that this issue only appears in IE, I have tested it in chrome and Firefox and both browsers display the text perfectly.
When I select a node this fixes the problem and all text displays as normal.
I want to add nodes that behave in a similar fashion as when you add new folders in windows explorer. i.e. right click > new folder > then the new folder is added and highlighted as New Folder so that as soon as the user types they are overwriting the folder name.
I can add a new node as a child node of the node I have selected and label it "New Node" but I can't figure out how to select the new node and have it highlighted so that when the user types, they are overwriting the "New Node" text.
I have tried this but it doesn't work.
Private Sub AddProjectToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles AddProjectToolStripMenuItem.Click Me.trvProjects.SelectedNode.Nodes.Add("New Node") Me.trvProjects.SelectedNode = trvProjects.Nodes("New Node") Me.trvProjects.Focus() End Sub
I have a function to rename a TreeView Node to a TextBox text.. When the user clicks a button with a little icon on it, a new Node is created. It is called Graphic_(0,1,2 ect.) So it changes the number to the TreeView Node count.
E.g Graphic_0 Graphic_1 ect.
But, the user can also Delete the nodes and Rename them..
Sooo... the problem is, that if the user renames a previous Node, and calls it Graphic_ and then the NEXT number to occur, 2 Nodes will be the same, and I don't want that.
E.g
Graphic_0 Graphic_1 Graphic_4 <<<< User renames to up coming node number.. Graphic_3
So what I want is to prevent 2 Nodes being the same.. how do I change the UPCOMING Node name to the missed out Node, in our example: Graphic_2.
I'm trying to open a file via a treeview. The nodes resemble the files and folders within a (parent)folder. I also have a textbox which has the location, including the name of the (parent)folder.
msgbox(e.node.fullpath.tostring)
This code gives me the path including the parent-node How do I get the path without the parent?
I'm in need of a custom control that will allow me to do something like the attached image. It's basically a TreeView with the exception of having a row of PictureBoxes for each child node. I'd be happy with a ListView that could do this even. I tried it briefly with a DataGridView with ImageColumns but the "look" wasn't quite what I was after. I'd like the "Parent Node" text to be situated above the row of images and just can't seem to find a control that will allow this.
In Treeview control, I have made particular node backcolor as black to hide text. But it does not work properly. On click of that particular node, it displays text eventhough when I set BackColor as Black. Is there anyway to hide the text in Scenario also. I don't want to actually remove the text from that node as I have done lot of coding by checking node text.
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?
Hi, i'm trying to use the treeview to display the text of a rtf (rich text file) file when an specific node if clicked.HomeOMGWOOTFor example, if i pick OMG, i want the text of lol.rtf to be displayed on a richtextbox. But somehow i just can't manage to get it... I know to import the text of a .txt file to a textbox, but using the treeview makes it more complicated.This is the code im using right now:
Private Sub TreeView1_NodeMouseClick(ByVal sender As Object, ByVal e As System.Windows.Forms.TreeNodeMouseClickEventArgs) Handles TreeView1.NodeMouseClick Select Case e.Node.Index Case 0
[code]....
Another thing is, that i can't import the *.rtf text into a richtextbox and i don't know why.
i'm trying to use the treeview to display the text of a rtf (rich text file) file when an specific node if clicked.HomeOMGWOOTFor example, if i pick OMG, i want the text of lol.rtf to be displayed on a richtextbox. But somehow i just can't manage to get it... I know to import the text of a .txt file to a textbox, but using the treeview makes it more complicated. [code] Another thing is, that i can't import the *.rtf text into a richtextbox and i don't know why.
there is one problem here the root node on the line "GetDirectories(info.GetDirectories(0, rootNode))" here is the error "Error 1 Value of type 'System.Windows.Forms.TreeNode' cannot be converted to 'System.IO.SearchOption'."
I'm afraid this is a very simple question, but I can't figure it out... I hardly ever use the DataGridView (usually use a third party grid) so I never needed to do this before.Anyway, I have a DataGridView that is data-bound to a List(Of SomeClass). The grid is not ReadOnly, but I made every column ReadOnly except the very first, which is a boolean column so it displays a checkbox. This way, the user cannot edit any cell value, but he can check/uncheck the checkbox in the first column.
What I need now basically is an event that is raised when the user (not programmatically) changes the value of this checkbox. I also need to be able to retrieve the bound item from that event (from the row number I think?) but that should be no problem, I hope.Anyway, there's a bunch of events that looked promising but all have something I don't want:
1. CellBeginEdit - Fires before the checkbox value has changed, so can't use this.
2. CellEndEdit - Only fires after the edited row loses focus. I want to save it back to the database as soon as the user changes the checkbox value!
3. CellValueChanged - Same problem as nr 2.
I'm sure it must be possible for me to react as soon as the user changes the value of the checkbox? How can I do this?
I have a treenode loading and I allow a user to add a node as a favorites node. I am trying to think like the user so I wanted to find out what happens if I deleted the folder form the tree and re-rann the app. Well it comes up with an error:
Is there a code for accessing the last two characters that the user places into a text box? Meaning, if the last two digits are not PM or AM, a message box should show saying that it is not a date (just for an example).Bgeo99
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.
