CListView not inserting items

From:
"MK" <michaelkatsilis@yahoo.com>
Newsgroups:
microsoft.public.vc.language
Date:
10 Sep 2006 18:14:04 -0700
Message-ID:
<1157937243.893810.81420@e3g2000cwe.googlegroups.com>
Hi,

I have an app (ie. Windows Explorer style) with a tree view, that
should update the list view with names when items are selected in it. I
cannot get the list view to show any values other than the column
headings. I've tried using LVITEM, calls to SendMessage with the
appropriate parameters, even tried using the ListView_ routines. I've
searched the group for solutions, tried some but they didn't work. I'm
pretty much stuck now, so any help in understanding why this problem is
occurring and a solution to it is much appreciated.

Here is some sample code. The class CefsmView inherits from CListView.
The problem is setting the values in the list view, see method
CefsmView::Populate(...) below which is called from
CefsmView::OnUpdate(...).

CefsmView::CefsmView() : mobjListCtrl(GetListCtrl())
{
}

BOOL CefsmView::PreCreateWindow(CREATESTRUCT& cs)
{
    cs.style |= LVS_SHOWSELALWAYS | LVS_REPORT;

    return CListView::PreCreateWindow(cs);
}

void CefsmView::OnInitialUpdate()
{
    CListView::OnInitialUpdate();

    LONG dwStyle;

    dwStyle = WS_TABSTOP |
          WS_CHILD |
          LVS_AUTOARRANGE |
          LVS_REPORT |
          LVS_EDITLABELS |
          LVS_SHAREIMAGELISTS |
          WS_VISIBLE;

    mobjListCtrl.ModifyStyle(mobjListCtrl.GetStyle(), dwStyle);
}

int CefsmView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
    if (CListView::OnCreate(lpCreateStruct) == -1)
        return -1;

    // Setup the columns
    CHeaderCtrl * hc = mobjListCtrl.GetHeaderCtrl();

    HDITEM hdi;
    hdi.mask = HDI_TEXT | HDI_WIDTH | HDI_FORMAT | HDF_IMAGE;

    // Insert columns into header control
    CString str;
    for (int i = 0; i < 5; i++)
    {
        switch (i)
        {
            case 0:
                str.Format(TEXT("Header1"), i);
                hdi.fmt = HDF_STRING | HDF_LEFT;
                break;
            case 1:
                str.Format(TEXT("Header2"), i);
                hdi.fmt = HDF_STRING | HDF_RIGHT;
                break;
            case 2:
                str.Format(TEXT("Header3"), i);
                hdi.fmt = HDF_STRING | HDF_LEFT;
                break;
            case 3:
                str.Format(TEXT("Header4"), i);
                hdi.fmt = HDF_STRING | HDF_LEFT;
                break;
            case 4:
                str.Format(TEXT("Header5"), i);
                hdi.fmt = HDF_STRING | HDF_RIGHT;
                break;
        }

        hdi.pszText = str.GetBuffer(0);

        // Insert the header
        hc->InsertItem(i, &hdi);

        // Autosize the column widths
        mobjListCtrl.SetColumnWidth(i, LVSCW_AUTOSIZE_USEHEADER);
    }

    return 0;
}

void CefsmView::Populate(const CString & sItemName)
{
    // sItemName is being passed into the method ok

    Reset();

    // Note: For some reason, if I insert a column
    // into the list view, then it will actually
    // insert items into that column. But the code
    // below does not insert items into existing
    // columns

    int nItem = mobjListCtrl.InsertItem(0, sItemName);
    BOOL bStatus = mobjListCtrl.SetItemText(nItem, 1, "SI 1");
    CheckStatus(bStatus);
    bStatus = mobjListCtrl.SetItemText(nItem, 2, "SI 2");
    CheckStatus(bStatus);
    bStatus = mobjListCtrl.SetItemText(nItem, 3, "SI 3");
    CheckStatus(bStatus);
    bStatus = mobjListCtrl.SetItemText(nItem, 4, "SI 4");
    CheckStatus(bStatus);
    bStatus = mobjListCtrl.SetItemText(nItem, 5, "SI 5");
    CheckStatus(bStatus);

    UpdateWindow();
}

void CefsmView::CheckStatus(const BOOLEAN bStatus)
{
    if (bStatus == FALSE)
    {
        AfxMessageBox(static_cast<CString>("Unsuccessful."),
                      MB_ICONINFORMATION|MB_OK);
    }
}

void CefsmView::Reset(void)
{
    mobjListCtrl.DeleteAllItems();
    while(objListCtrl.DeleteColumn(0));
    UpdateWindow();
}

void CefsmView::OnUpdate(CView* pSender,
                         LPARAM lHint,
                         CObject* pHint)
{
    CListView::OnUpdate(pSender, lHint, pHint);

    CString s = reinterpret_cast<LPCSTR>(pHint);
    if (!s.IsEmpty())
    {
        Populate(s);
    }

}

Regards,

Michael

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