通過樹形控件中項的名稱找到項（Finding an Item in a CTreeCtrl）

If you want to find an item in a tree control (CTreeCtrl from MFC) by its name you need a recursive function. Below is a function that does that. How does it work: you pass the text of the item to search, the tree reference and an item in the tree. The function will search through the sub-tree of that item for a match. If it finds it, it returns the tree item, otherwise NULL. To search the entire tree, pass the root of the tree. If your tree has more than just one root and you want to search the entire tree, you’d have to call it once for each root item.

// name - the name of the item that is searched for
// tree - a reference to the tree control
// hRoot - the handle to the item where the search begins
HTREEITEM FindItem(const CString& name, CTreeCtrl& tree, HTREEITEM hRoot)
{
   // check whether the current item is the searched one
   CString text = tree.GetItemText(hRoot);
   if (text.Compare(name) == 0)
      return hRoot; 
 
   // get a handle to the first child item
   HTREEITEM hSub = tree.GetChildItem(hRoot);
   // iterate as long a new item is found
   while (hSub)
   {
      // check the children of the current item
      HTREEITEM hFound = FindItem(name, tree, hSub);
      if (hFound)
         return hFound; 
 
      // get the next sibling of the current item
      hSub = tree.GetNextSiblingItem(hSub);
   } 
 
   // return NULL if nothing was found
   return NULL;
}
           

[Update]

To search the entire tree you can use this helper function, which will work regardless how many roots the tree has.

HTREEITEM CTreeDemoDlg::FindItem(const CString& name, CTreeCtrl& tree)
{
   HTREEITEM root = m_tree.GetRootItem();//m_tree是成員變量，即目前要搜尋的樹形控件
   while(root != NULL)
   {
      HTREEITEM hFound = FindItem(name, tree, root);
      if (hFound)
         return hFound; 
 
      root = tree.GetNextSiblingItem(root);
   }
 
   return NULL;
}