CListCtrl LPSTR_TEXTCALLBACK 问题

[huanchunling]

Hi,
我现在想动态更新CListCtrl里面项的text, 但是不能成功。
代码如下：

DWORD dwStyle =  m_listctrl.GetExtendedStyle();
m_listctrl.SetExtendedStyle(dwStyle | LVS_EX_FULLROWSELECT | LVS_EX_BORDERSELECT | LVS_EX_SUBITEMIMAGES);

int nIndex = m_listctrl.InsertColumn(0, _T("ICon"), LVCFMT_LEFT, 50
nIndex = m_listctrl.InsertColumn(1, _T("Job"), LVCFMT_LEFT, 200);
nIndex = m_listctrl.InsertColumn(2, _T("ICon"), LVCFMT_LEFT, 50);

LVITEM lvi;
memset(&lvi, 0, sizeof(lvi));

//The first column used display an icon
lvi.mask	= LVIF_IMAGE;
lvi.iItem	= 0;
lvi.iImage	 = I_IMAGECALLBACK;
int nItem = m_listctrl.InsertItem(&lvi);

//The second column used for display an icon and a label	
memset(&lvi, 0, sizeof(lvi));
lvi.mask	=  LVIF_IMAGE | LVIF_TEXT;
lvi.iItem	= nItem;
lvi.iImage	=  I_IMAGECALLBACK;
lvi.iSubItem = 1;
m_listctrl.SetItem(&lvi);

//The third column used for display an icon 
memset(&lvi, 0, sizeof(lvi));
lvi.mask	=  LVIF_IMAGE ;
lvi.iItem	= nItem;
lvi.iImage	=  I_IMAGECALLBACK;
lvi.iSubItem = 2;
m_listctrl.SetItem(&lvi);



void CAboutDlg::OnLvnGetdispinfoList(NMHDR *pNMHDR, LRESULT *pResult)
{
    NMLVDISPINFO *pDispInfo = reinterpret_cast<NMLVDISPINFO*>(pNMHDR);
    *pResult = 0;

    if (pDispInfo->item.mask & TVIF_SELECTEDIMAGE
	|| pDispInfo->item.mask & TVIF_IMAGE)
    {
	int nImage = m_BFImageList.Add(::AfxGetApp()->LoadIcon(IDR_MAINFRAME));
        pDispInfo->item.iImage = nImage;

	if(pDispInfo->item.mask & TVIF_TEXT)
	{
	  if(pDispInfo->item.iSubItem == 1)
	  m_listctrl.SetItemText(pDispInfo->item.iItem, pDispInfo->item.iSubItem, _T("aaa"));
	}
    }
    else if (pDispInfo->item.mask & TVIF_TEXT)
    {	
	m_listctrl.SetItemText(pDispInfo->item.iItem, pDispInfo->item.iSubItem, _T("aaa"));
    }
    // TODO: Add your control notification handler code here
    *pResult = 0;
}

当调试的时候发现，第一次"aaa"能正确的设置到列表框，但是以后OnLvnGetdispinfoList的调用都不会再去设置text了，如果我想再一次去更新text, 应该怎么做或者CListCtrl无法实现？

[lgstudyvc]

刷新了后也不显示？

[Eleven]

你需要动态更新CListCtrl中的东西，直接调用CListCtrl::SetItemText()即可。

[Eleven]

OnLvnGetdispinfoList函数中调用CListCtrl::SetItemText()的代码换成下面这种方式的
LV_DISPINFO* pDispInfo = (LV_DISPINFO*)pnmh;
LV_ITEM* pItem= &(pDispInfo)->item;
lstrcpyn(pItem->pszText, _T("aaa"), pItem->cchTextMax);

[huanchunling]

牛， 这个你是怎么发现的

[Eleven]

If the LVITEM structure is receiving item text, the pszText and cchTextMax members specify the address and size of a buffer. You can either copy text to the buffer or assign the address of a string to the pszText member. In the latter case, you must not change or delete the string until the corresponding item text is deleted or two additional LVN_GETDISPINFO messages have been sent.