CTreeCtrl::InsertItem

發行項
02/28/2013

呼叫此函式將新項目插入樹狀檢視控制項。

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
);

參數

lpInsertStruct
指定要插入的樹狀檢視項目的屬性設定為 TVINSERTSTRUCT 的指標。
nMask
指定哪些屬性的整數陣列。請參閱在 Windows SDK的 TVITEM 結構。
lpszItem
包含項目的文字字串的位址。
nImage
項目的影像索引在樹狀檢視控制項的影像清單的。
nSelectedImage
項目已選取的影像索引在樹狀檢視控制項的影像清單的。
nState
為項目狀態指定值。以適當的狀態清單中看到樹狀檢視控制項在 Windows SDK 的項目狀態。
nStateMask
指定哪些狀態要設定屬性。請參閱在 Windows SDK的 TVITEM 結構。
lParam
32 位元的應用程式專屬值與項目。
hParent
插入項目之父代的控制代碼。
hInsertAfter
要插入項目，之後新項目的控制代碼。

傳回值

新項目的控制代碼，如果成功，否則 NULL。

備註

這個範例顯示您可能想要使用函式的每個版本中，當插入樹狀目錄控制項項目時的情況。

範例

// 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);