How to add and retrive the LPARAM value from CTreeCtrl?

[mikert_2008]

Hi, I am useing CTreeCtrl class to build tree. I want to add CString as a additional parameter(LPARAM) to leaf node. How can I add/retrive LPARAM? For Insertion I am Using:- tree.InsertItem("Employees", 0, 0, TVI_ROOT); And For retrival I Am using:- HTREEITEM hCurSel = tree.GetNextItem(TVI_ROOT, TVGN_CARET); Please suggest If I need to use different method for it or modify above method for add/Retrive LPARAM. Thanks:- Mike

[CPallini]

What about SetItemData[^] and GetItemData [^] methods? :)

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[mikert_2008]

Hi, I am not sure about SetItemData() and GetItemData() will solve my purpose. I want to send some CString value with each leaf node. e.g If you insert node 'Employee1' in the tree I will add 'EmployeeId1' as a LPARAM. So that next time when i retrive the node data I need to get LPARAM(Id associated with leaf node) somehow. Please suggest how this can achive? Thanks:- Mike

[CPallini]

mikert_2008 wrote:

I am not sure about SetItemData() and GetItemData() will solve my purpose.

I'm pretty confident about (I trust in your skills :rolleyes:). With SetItemData you may store a pointer to your string (the string should not vanish in the meantime...). With GetItemData you may get back such pointer. :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler. -- Alfonso the Wise, 13th Century King of Castile.
This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong. -- Iain Clarke
[My articles]

[Code o mat]

As CPallini suggested, you should use SetItemData and GetItemData, these can store and retrieve a 32 (or 64?) bit value, so you can't use a string, BUT you can either use a pointer to a string OR maybe an index into an array of strings, of course you will have to maintain these somehow, so if you remove an item you also manually need to remove the string or when you add the item you will have to add the string.

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