奇怪的树形控件之双击响应

[qiek]

afx_msg void OnDoubleClk(NMHDR* pNMHDR, LRESULT* pResult);

ON_NOTIFY_REFLECT(NM_DBLCLK, OnDoubleClk)


void CMyTree::OnDoubleClk(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;

HTREEITEM hti = pNMTreeView->itemNew.hItem;
CString cs = GetItemText(hti);
AfxMessageBox(cs);

HTREEITEM hti2 = pNMTreeView->itemOld.hItem;
cs = GetItemText(hti2);
AfxMessageBox(cs);

*pResult = 0;
}
用如上方法添加后，可以看到两次消息框，但却得不到树节点的文本，不知问题出在哪里。

[jerry]

POINT pt;
::GetCursorPos(&pt);
ScreenToClient(&pt);
HTREEITEM h = HitTest(pt);
if(h)
{
cs = GetItemText(h);
AfxMessageBox(cs);
}

[Kudeet]

http://www.vckbase.com/document/viewdoc/?id=447

[qiek]

HTREEITEM hti = GetSelectedItem();
CString cs = GetItemText(hti);
AfxMessageBox(cs);

解决方法很简单,想知道原因在其他消息响应中用HTREEITEM hti = pNMTreeView->itemNew.hItem;
就可以,为什么在双击响应中不行?

[aoosang]

HTREEITEM hti = pNMTreeView->itemNew.hItem;
CString cs = GetItemText(hti);
AfxMessageBox(cs);



hti有可能是NULL,但是你没有判断,就要GetItemText,所以cs肯定也是空的了,

[miladuo]

没试过双击的。单击我是用
HTREEITEM hSelectedItem;
SelectedItem = m_treeCtrl.GetSelectedItem();
CString strTitle;
strTitle = m_treeCtrl.GetItemText(hSelectedItem);