Condividi tramite


CTreeCtrl::InsertItem

Call this function to insert a new item in a tree view control.

HTREEITEM InsertItem(
   LPTVINSERTSTRUCT lpInsertStruct 
);
HTREEITEM InsertItem(
   UINT nMask,
   LPCTSTR lpszItem,
   int nImage,
   int nSelectedImage,
   UINT nState,
   UINT nStateMask,
   LPARAM lParam,
   HTREEITEM hParent,
   HTREEITEM hInsertAfter 
);
HTREEITEM InsertItem(
   LPCTSTR lpszItem,
   HTREEITEM hParent = TVI_ROOT,
   HTREEITEM hInsertAfter = TVI_LAST 
);
HTREEITEM InsertItem(
   LPCTSTR lpszItem,
   int nImage,
   int nSelectedImage,
   HTREEITEM hParent = TVI_ROOT,
   HTREEITEM hInsertAfter = TVI_LAST
);

Parameters

  • lpInsertStruct
    A pointer to a [TVINSERTSTRUCT] that specifies the attributes of the tree view item to be inserted.

  • nMask
    Integer specifying which attributes to set. See the [TVITEM] structure in the Windows SDK.

  • lpszItem
    Address of a string containing the item's text.

  • nImage
    Index of the item's image in the tree view control's image list.

  • nSelectedImage
    Index of the item's selected image in the tree view control's image list.

  • nState
    Specifies values for the item's states. See Tree View Control Item States in the Windows SDK for a list of appropriate states.

  • nStateMask
    Specifies which states are to be set. See the [TVITEM] structure in the Windows SDK.

  • lParam
    A 32-bit application-specific value associated with the item.

  • hParent
    Handle of the inserted item's parent.

  • hInsertAfter
    Handle of the item after which the new item is to be inserted.

Return Value

Handle of the new item if successful; otherwise NULL.

Remarks

The example shows situations in which you might want to use each version of the function when inserting a tree control item.

Example

// Insert a root item using the structure. We must
// initialize a TVINSERTSTRUCT structure and pass its
// address to the call. 

TVINSERTSTRUCT tvInsert;
tvInsert.hParent = NULL;
tvInsert.hInsertAfter = NULL;
tvInsert.item.mask = TVIF_TEXT;
tvInsert.item.pszText = _T("United States");

HTREEITEM hCountry = m_TreeCtrl.InsertItem(&tvInsert);

// Insert subitems of that root. Pennsylvania is
// a state in the United States, so its item will be a child
// of the United States item. We won't set any image or states,
// so we supply only the TVIF_TEXT mask flag. This
// override provides nearly complete control over the
// insertion operation without the tedium of initializing
// a structure. If you're going to add lots of items
// to a tree, you might prefer the structure override
// as it affords you a performance win by allowing you
// to initialize some fields of the structure only once,
// outside of your insertion loop.

HTREEITEM hPA = m_TreeCtrl.InsertItem(TVIF_TEXT,
   _T("Pennsylvania"), 0, 0, 0, 0, 0, hCountry, NULL);

// Insert the "Washington" item and assure that it is
// inserted after the "Pennsylvania" item. This override is 
// more appropriate for conveniently inserting items with 
// images.

HTREEITEM hWA = m_TreeCtrl.InsertItem(_T("Washington"),
   0, 0, hCountry, hPA);

// We'll add some cities under each of the states.
// The override used here is most appropriate
// for inserting text-only items.

m_TreeCtrl.InsertItem(_T("Pittsburgh"), hPA, TVI_SORT);
m_TreeCtrl.InsertItem(_T("Harrisburg"), hPA, TVI_SORT);
m_TreeCtrl.InsertItem(_T("Altoona"), hPA, TVI_SORT);

m_TreeCtrl.InsertItem(_T("Seattle"), hWA, TVI_SORT);
m_TreeCtrl.InsertItem(_T("Kalaloch"), hWA, TVI_SORT);
m_TreeCtrl.InsertItem(_T("Yakima"), hWA, TVI_SORT);

Requirements

Header: afxcmn.h

See Also

Reference

CTreeCtrl Class

Hierarchy Chart

CTreeCtrl::DeleteItem

CTreeCtrl::HitTest

CTreeCtrl::SelectDropTarget

CTreeCtrl::GetItem

Tree View Control Reference

Other Resources

CTreeCtrl Members