CListView不能设置列内容

Question

程序基于MDI，我创建了一个视类继承自CListView，但不知为什么如下代码中

void CMakefileView::OnUpdate(CView* /*pSender*/, LPARAM lHint, CObject* pHint)
{
 // TODO: Add your specialized code here and/or call the base class

 /*
 if(GetDocument() == pHint)
 {
 */
  int i = 0;
  CString strText;

  // TODO: Add your specialized code here and/or call the base class
  CListCtrl& listCtrl = GetListCtrl();
  listCtrl.DeleteAllItems();

  vector<CItem>::iterator iter;
  vector<CItem>* pCont = (reinterpret_cast<CMakeGen2Doc*>(GetDocument()))->GetContPtr();

  for(iter = pCont->begin(); iter != pCont->end(); iter++, i++)
  {
   strText.Format(TEXT("%d"), i);
   int nItem = listCtrl.InsertItem(i, strText);

   strText.Format(TEXT("%S"), iter->m_strLineCont.c_str());
   int nRet = listCtrl.SetItemText(nItem, 1, strText);   
  }
  /*
 }
 */
}

InsertItem()是成功的，但SetItemText()不能设置列内容。

请问有人遇到过类似的问题吗？或者说大概是什么原因导致这样的问题？由于代码较多，不能整个贴上来，给大家造成诊断上的不便，请谅解。

多谢。

Answer 1

Debug调试下strText有值吗？

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Visual C++ enthusiast, like network programming and driver development. At present is being engaged in the WinCE/Windows Mobile platform embedded development.

Answer 2

I am just on office, so I can only reply in English. Yes, it's endowed with literary value. Once I've tried

int nRet = listCtrl.SetItemText(nItem, 1, _T("Test"));

also nothing happened.

MSDN is vague about the formatting string, I've typed

strText.Format(TEXT("%s"), iter->m_strLineCont.c_str());

here, the s in "%s" is in lower case, and seems strText is filled with rubbish, so I change the s in upper case, and it seems strText contains reasonable value:

strText.Format(TEXT("%S"), iter->m_strLineCont.c_str());

but also nothing happens.

Another question, I've tried CListView in SDI, it seems all is OK, and the third parameter in the function OnUpdate(CView* /*pSender*/, LPARAM lHint, CObject* pHint) is also passed to a non-zero value when the function be called. But in my MDI counterpart, if the condition
if(GetDocument() == pHint) be added, it's always false, and debugging shows that pHint is 0. I just can not understand why such a behaviour.

Anyone can give a help or hint is thanked in advance.