Develop Reference

Infragistics Drag and Drop Tree Expand Multiple Nodes Simultaneously

I am using the following Infragistics component for viewing hierarchical data.
http://www.igniteui.com/tree/drag-and-drop-single-tree
I could able to load data correct but the problem is wI cant expand multiple nodes simultaneously. I mean when I expand a node the other node collapsed expanding only the current node. Can some one please suggest if there is any configuration setting I am missing to accomplish this?
I want the nodes once expanded will remain expanded until user collapses it again.
Thanks,
Krishna Prasad

The option that controls that is singleBranchExpand. Set it to false to allow multiple nodes to be expanded at the same time. http://jsfiddle.net/ywtLL7ka/
$("#tree").igTree({
singleBranchExpand: false,
});

How to set threeview node checkbox to mix state i.e. if any of the child node is selected, Parent node should fill in to indicate that

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.

how use checkbox that show in control panel program feature

I am making a windows application in C#.
I want to use the checkbox that comes in windows 7 control panel program feature.
If the subcheckboxes of the tree are all not selected then the parent checkbox should be filled
If all subitems are selected then the parent checkbox should be checked
If all subitems are unselected then the parent checkbox should be unselected.
I am using separate checkboxes (like checkboxImageList, found in google), not a treeview checkbox.

Well, a treeview checkbox would save you a lot of hassle here, because you can just use LINQ to check or uncheck all nodes when a node is clicked by handling the Click event (let's say clickedItem is the node that was clicked:
foreach (TreeNode node in clickedItem.Nodes.ToList())
{
node.IsSelected = clickedItem.IsSelected;
}
Also, from a user interface point of view, the TreeView makes sense. If you absolutely insist on using individual checkboxes, then you just build a tree of CheckBox items in memory, perhaps using something like this sample Tree<T> data type, and then when you click on a checkbox, just recursively travel through the tree until you've checked every box under that one.
But consider what will happen with your app. You might have so many options in the future that you'll need a way to programatically add them. You might need scrolling. You might need to make the entire thing configurable. And once you've added all that, you'll just have re-implemented TreeView.

Maybe you should better use a TreeView. Here's an example of a TreeView managing alone the mid-check state.

How do I use TreeView with my Tree Datastructure? C# .NET

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.

How to get child location in a treeview?

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!