拜托大家了，怎样做一个CTreeCtrl的备份？

Question

http://www.csdn.net/Expert/TopicView1.asp?id=878377RT，我有一个CTreeCtrl的实例，并且已经有树（树林）在其中保存，现在我想把这个实例保存到另外一个新的CTreeCtrl的实例中，我应该如何做呢？很着急呀，我已经有相关的帖子询问了，如果帮助我解决了问题，分全部给您

Answer 1

void CTestDlgDlg::SaveTreeCtrl(CStdioFile* pFile, HTREEITEM hTreeItem)
{
//Save SiblingItem Num
CString strSiblingItemNum;
int iSiblingItemNum = GetSiblingCount(hTreeItem);
strSiblingItemNum.Format("%d", iSiblingItemNum);
pFile->WriteString(strSiblingItemNum+"\n");

HTREEITEM hSiblingItem = hTreeItem;
for (int i=0; i<iSiblingItemNum; i++)
{
//Get Item Text
CString strItemText;
TVITEM tvitem;
tvitem.mask = TVIF_TEXT;
tvitem.hItem = hSiblingItem;
tvitem.pszText = strItemText.GetBuffer(512);
tvitem.cchTextMax = 512;
m_treectrl.GetItem(&tvitem);
strItemText.ReleaseBuffer();
pFile->WriteString(strItemText+"\n"); //Save ChildItem Num
if (m_treectrl.ItemHasChildren(hSiblingItem))
{ 
pFile->WriteString("1\n");
SaveTreeCtrl(pFile, m_treectrl.GetChildItem(hSiblingItem));
}
else
{
pFile->WriteString("0\n");
}
hSiblingItem = m_treectrl.GetNextSiblingItem(hSiblingItem);
}
}void CTestDlgDlg::LoadTreeItem(CStdioFile *pFile, HTREEITEM hParentTreeItem)
{
CString strSiblingItem;
pFile->ReadString(strSiblingItem);//
int iSiblingItemNum = atoi(strSiblingItem.LockBuffer());
strSiblingItem.UnlockBuffer(); CString strSiblingItemText, strHasChild;
bool bHasChild;
HTREEITEM hTreeItem;
for (int i=0; i<iSiblingItemNum; i++)
{
pFile->ReadString(strSiblingItemText);//
hTreeItem = m_treectrl.InsertItem(strSiblingItemText, hParentTreeItem);
pFile->ReadString(strHasChild);
bHasChild = (atoi(strHasChild.LockBuffer()) == 1)?true:false;
if (bHasChild)
{
LoadTreeItem(pFile, hTreeItem);
}
}
}int CTestDlgDlg::GetSiblingCount(HTREEITEM hFirstChildItem)
{
int iSiblingNum = 1;
HTREEITEM hSiblingItem = m_treectrl.GetNextSiblingItem(hFirstChildItem);
while (hSiblingItem)
{
iSiblingNum++;
hSiblingItem = m_treectrl.GetNextSiblingItem(hSiblingItem);
}
return iSiblingNum;
}如果要 Save
try
{
CStdioFile file("ABC.txt", CFile::modeWrite | CFile::modeCreate | CFile::typeText);
SaveTreeCtrl(&file, m_treectrl.GetRootItem());
file.Close();
}
catch (CFileException *pFx)
{
pFx->ReportError();
pFx->Delete();
}如果要 Load
try
{
CStdioFile file("ABC.txt", CFile::modeRead | CFile::typeText);
         m_treectrl.DeleteAllItems();
LoadTreeItem(&file, 0);
file.Close();
}

Answer 2

bHasChild = (atoi(strHasChild.LockBuffer()) == 1)?true:false;
下面应该加多一句
strHasChild.UnlockBuffer();