In my C# windows application there is a Treeview with some roots and child.The Need is that When I checked Parentnode all Childnode under this must be getselected and when i change checked state of childnode the parent node must be diselect?
I can only guess what you trying to achive. But at least it sounds similar to the Example that is provided in MSDN.
https://msdn.microsoft.com/en-us/library/system.windows.forms.treeview.aftercheck(v=vs.110).aspx
Related
I have created TreeList in Windows form and I added up and down buttons .In treelist there are lot of parent nodes with child nodes. Once expand a parent node , having child nodes and the child node is also a parent node. I want to get the count value of child node for current selected Parent Node.
Please Guide me solve this issue.
Thanks and regards
Saravanan
The SelectedNode property of a TreeView object returns the currently selected node.
For any node in a tree view (including the one returned by SelectedNode), the LastNode property returns the last child node under it.
In general, it would be beneficial for you to study all the properties and methods of a class that you're working on, to discover is behaviours. For instance in this case, looking at the TreeView class and TreeNode class gives you the information required to navigate a tree view.
In my task ,I searched a lot of process.But there is no need to find out the count of child or parents nodes ..there is a predefined function in c#.which is used to move all over the in the treelist nodes.
TreeList.MoveNextVisible();
Treelist.MovePrevVisible();
or
TreeList.MoveNext();
TreeList.MoveNextVisible();
or
TreeList.Move();
TreeList.Move();
Once expand nodes in treelist,these prededined fuction will move in to their parents and its child nodes
I am working on a windows form application, where I connect to the database and get a list of projects and sub-projects. I am able to show this as a treeview with checkboxes, that later an user can select to do further operations.
My problem is that, I can't set the Parent node state when one of the child nodes is selected. Here, I want some indication, if any of the child nodes is selected the parent node should fill in to show that something has been selected below that parent node.
Okay, meanwhile, I found answer to my problem. Not really wise but thanks to this Simple Tri-State TreeView control. code link here.
I will definitely try to build my own custom version of this. For now, this works fine.
I have a Tree and load it recursively into my TreeView on my form. The problem is, I do not know how to find out which object in my Tree that I am selected on when I select a node in my TreeView. Any ideas?
You can set the TreeNode's Tag property to the corresponding instance from your object model.
The TreeView nodes (TreeNodes) have properties like Level, Tag, Text etc. The Level property lets you identify in which level is your TreeNode in the TreeView and the Tag and Text properties may let you identify your node uniquely. You may also add same kind of properties to your Tree too and thus you may compare them relevantly and do the conversion you require...
Hope this helps...
If you have a unique id for each record you can assign that id as the TreeNode.Name. TreeNode.Tag is another option.
I currently have a simple tree view that contains one parent node with multiple child nodes. I was wondering if there is a way to find the location of the selected node in the parent tree.
I currently have an action event on the treeview and when the user clicks on the child it prints out the string value of the selected child. I have tried using:
int val = TreeView.SelectedItemProperty.GlobalIndex;
but it always returns 0. I have seen some examples in VB but I cant seem to get the same idea to work in C#.
You have to use the ItemContainerGenerator property of the Treeview.
http://msdn.microsoft.com/en-us/library/system.windows.controls.itemcontainergenerator.aspx
See: ContainerFromIndex and IndexFromContainer
Note that each TreeViewItem also has an ItemContainerGenerator (its an ItemsControl), so you'd have to recursively search down the tree if you have multiple levels.
I think the answer to all your treeview problems (and most ui ones) in wpf is to build a ViewModel. Anytime you start crawling the visual tree to look for elements that you are already binding to, you are doing things the hard way. Once you start using ItemsContainerGenerator you have to start worrying about a whole lot of issues you should not have to.
You are binding to a hierarchical structure. If that structure has a selected item property on each item and it is bound to the TreeViewItem selected item then you can just get the selected item in code and do everything else from there. Have a look at a similiar question here.
So i didn't find the answer i was looking for (I may of confused others with what my question was. by saying location). Anyways how I solved it was I got the string value of the child selected and compared it to my list. Thanks to those who answered!
I have a treeView , and i want to know if some node can be seen by a user.
I mean that no node abave it not needed to be expanded that that node will be seen .
Any idea how i can check this with out rotating to upper lever for that ?
Checked msdn but couldn't see property responsible for that ....
Some Example will really help....
Thanks a lot for help.
I assume if you want to know if a treenodes parent is expanded
TreeNode.Parent.IsExpanded
I think this is what you need:
Node myNode;
if(myNode.Parent.Expanded)
//Visible