Adding context menu with Hiearchical View Model

[Anne Lyon]

Hi,

My TreeView is bound to a ObservableCollection<TreeNode>. Using a HierarchicaldataTemplate the ItemSource is bound to my collection's TreeNodeChildren.
I want to bind a context meny to each node, and must do it in code as the context meny can be different for each node.

But how do I bind the contect menu to the node when the node is a TreeNode and not a RadTreeViewItem?
I cannot cast the current TreeNode to a RadTreeViewItem and hence cannot use the code:
myRadTreeViewItem.SetValue(RadContextMenu.ContextMenuProperty, contMenu);
as TreeNode doesn't have that functionality. I know how to bind properties, like isExpanded, between myTreeNode class and the TreeView, but how do I "bind" a command?

So in code I want to add a new TreeNode to my bound TreeNodeChildren collection, then dynamically create a new context menu and attach this context menu to my newly created TreNode. How do I do that?

Appreciate if somebody has an idea!

[Petar Mladenov]

Hello Anne ,

Could you please explain me  by what criteria you are going to differentiate  the context menus? Is it going to be a property, or the type of the business object, or something else?

Best wishes,
Petar Mladenov
the Telerik team

[Anne Lyon]

Hello Petar,

First of all I apologize this question has appeared so many times in the forum as I encountered a Telerik server error which made me believe the postings had been unsuccessful... Please remove duplicate postings if you like...

When the user clicks a node in my treeView my code behind accesses a database and returns a list of strings the context menu will consist of depending on the properties of the current node. This context menu allows the user to add sub-nodes, i.e. build a hierarchy. (I.e. if the current node is a Financial Department you can add "Book-keeping", "Auditing", "Billing"  from a context menu- if the current Node is a Technical Department you can add "Design", "Development", "Patenting" etc. This cannot be hardcoded but must be fecthed from the database on the go)
I have tried the code:
RadContextMenu.SetContextMenu(myTreeN ode, contMenu)   
and I have tried:
RadContextMenu.SetContextMenu(myTreeView.SelectedItem, contMenu) 
but I get a syntax error on first parameter as it is not of the right type.
How do I attach a context menu to myTreeNode or how do I find the RadTreeViewItem corresponding to my current node so that I can attach a context menu?

[Petar Mladenov]

Hello Anne ,

I am not sure when do you attach the ContextMenu. However, a possible approach towards your scenario is to handle the RadTreeView ItemPrepared() event to define a ContextMenu for each item.

Please take a look at the attached example and let me know if it works for you. If it doesn't or if your scenario requires a different approach, please elaborate a bit more on it.

You can also check this demo implementing ContextMenu on the RadTreeView : http://demos.telerik.com/silverlight/#TreeView/AddRemoveDisable

Let us know if we can further assist you.

Sincerely yours,
Petar Mladenov
the Telerik team