MFC树形控件加载Access数据库数据

研究了好几天,今天终于弄好了,下面是代码

[dlg.cpp]

在初始函数OnInitDialog()中加

HICON hIcon[3];

HTREEITEM hRoot;

//加载三个图标

hIcon[0] = theApp.LoadIconW(IDI_ICON1);

hIcon[1] = theApp.LoadIconW(IDI_ICON3);

hIcon[2] = theApp.LoadIconW(IDI_ICON2);

m_imageList.Create(16, 16, ILC_COLOR16, 3, 3);
for (int i=0;i<3;i++)
{
	m_imageList.Add(hIcon[i]);
}
//绑定树控件与ImaageList
m_webTree.SetImageList(&m_imageList, TVSIL_NORMAL);
//初始化Ado环境
AfxOleInit();
hRoot = NULL;
OpenConn();		//打开数据函数
LoadTreeCtrlData(hRoot,_T("0"));	//递归加数据到树控件中
CloseConn();		//关闭数据库

//下面就是递归函数

void CMFCApp_CTreeCtrl_testDlg::LoadTreeCtrlData(HTREEITEM hItem,CString mid)

{

HTREEITEM temItem;

_RecordsetPtr m_pRecordset;

m_pRecordset.CreateInstance(__uuidof(Recordset));

try

{

CString sql;

sql.Format(_T("select * from mTable where pID='%s'"), mid);

	m_pRecordset->Open((_variant_t)sql, m_pConnection.GetInterfacePtr(), adOpenDynamic, adLockOptimistic, adCmdText);
	//AfxMessageBox(_T("123"));
}
catch (_com_error e)
{
	CString str;
	str.Format(_T("连接数据表失败:%s"), e.ErrorMessage());
	AfxMessageBox(str);
	return;
}

_variant_t var;
CString strTmp;
while (!m_pRecordset->adoEOF)
{
	var = m_pRecordset->GetCollect(_T("mName"));
	strTmp = (LPCTSTR)_bstr_t(var);
	temItem=m_webTree.InsertItem(strTmp, 1, 1, hItem, TVI_LAST);

	//把自己的mID存入到节点中,

//节点存放的是指针地址的数据,查了好几天百度才弄清.

	var = m_pRecordset->GetCollect(_T("mID"));
	strTmp = (LPCTSTR)_bstr_t(var);
	CString* pStr = new CString;
	*pStr = strTmp;
	m_webTree.SetItemData(temItem,(DWORD)pStr);

	//递归加载子节点
	LoadTreeCtrlData(temItem,strTmp);
	m_pRecordset->MoveNext();
}

}

//取出数据

CString strText;

HTREEITEM hItem = m_webTree.GetSelectedItem();

//strText = m_webTree.GetItemText(hItem);

CString str = (CString)m_webTree.GetItemData(hItem);

if(str!=NULL)

strText.Format(_T("%s"), str->GetString());

SetDlgItemText(IDC_ITEM_SET_EDIT,strText);

尽管磕磕绊绊的好几天,今天总算弄出效果了.