Get all items in treeview

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I have a tree view from where I need to fetch the text from all the tree view items one by one. The TreeView_GetItem() is returning 0, could not find the problem.

I m posting the code. Please help me, I'm new to VC.

C++

BOOL CGuiEzAutomator::GetBoolVal(const char* szWndName, const char* szTreeCtrlId)
{
    BOOL bRet = FALSE;

    TV_ITEM *tvi;


    // get teh tree view control handle
    HWND hWnd = GetTreeViewHandleForDW(szWndName, szTreeCtrlId);

    HANDLE hProcess = OpenProcessHandle(hWnd);


if(NULL != hWnd)
    {

    int nCount = TreeView_GetCount(hWnd);

    HTREEITEM hItem = TreeView_GetRoot( hWnd );

    tvi=(TV_ITEM*)VirtualAllocEx(hProcess, NULL, sizeof(TV_ITEM), MEM_COMMIT, PAGE_READWRITE);

    TV_ITEM* ptvi = new TV_ITEM;

        memset(ptvi, 0, sizeof(TV_ITEM));

        ptvi->mask = TVIF_HANDLE;
        ptvi->pszText = (LPSTR) VirtualAllocEx(hProcess, NULL, 400 * sizeof(TCHAR), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
        ptvi->cchTextMax = 400;
        ptvi->hItem = hItem;

        while(ptvi->hItem)
        {
        BOOL WRITE =    WriteProcessMemory(hProcess, &tvi, ptvi, sizeof(TV_ITEM), NULL);

    //  CString Text = GetItemText(hItem);

            BOOL ret = TreeView_GetItem(hWnd, ptvi);

            DWORD dwErr = ::GetLastError();

            if (BOOL ret = TreeView_GetItem(hWnd, ptvi))
            {

                ReadProcessMemory(hProcess, &ptvi, &tvi, sizeof(TV_ITEM), NULL);

                TCHAR * sText = new TCHAR(ptvi->cchTextMax);

                CString sRetText = ptvi->pszText;

            //  if((ptvi->pszText) == "Given Text")
            //  {
                    //TO DO
            //  }
            }
                // Go to next sibling item.
                    ptvi->hItem = TreeView_GetNextItem(hWnd, ptvi->hItem, TVGN_NEXT);

        }

        // Free the memory in the remote process's address space
        VirtualFreeEx(hProcess, ptvi, 0, MEM_RELEASE);
    }
    return TRUE;
}

Posted 21-Jun-10 21:15pm

jagadish015

Updated 21-Jun-10 22:27pm

Moak

v2

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2 solutions

Solution 2

Hi Thanks for ur reply

I just changed code little bit like this

C++

BOOL CGuiEzAutomator::GetBoolVal(const char* szWndName, const char* szTreeCtrlId)
{
    BOOL bRet = FALSE;

    TV_ITEM *tvi;


    // get teh tree view control handle
    HWND hWnd = GetTreeViewHandleForDW(szWndName, szTreeCtrlId);

    HANDLE hProcess = OpenProcessHandle(hWnd);

    HGLOBAL hClipData = GlobalAlloc(GMEM_MOVEABLE | GMEM_DDESHARE, sizeof(TCHAR) * 10240);
    LPTSTR pClipData = (LPTSTR) GlobalLock(hClipData);
    pClipData[0] = 0;


    if(NULL != hWnd)
    {


    int nCount = TreeView_GetCount(hWnd);

    HTREEITEM hItem = TreeView_GetRoot( hWnd );

    tvi=(TV_ITEM*)VirtualAllocEx(hProcess, NULL, sizeof(TV_ITEM), MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);

    TVITEMEX item;
        item.hItem = hItem;
        item.mask = TVIF_TEXT | TVIF_HANDLE ;
        item.pszText = (LPTSTR) (tvi + 1);
        item.cchTextMax = 100;

        while(item.hItem)
        {
        BOOL WRITE =    WriteProcessMemory(hProcess, tvi, &item, sizeof(item), NULL);

            if (BOOL ret = TreeView_GetItem(hWnd, tvi))
                {

                    BOOL READ = ReadProcessMemory(hProcess, tvi, &pClipData[0], 1024, NULL);

                    CString csCurrentNode(pClipData);

                if(csCurrentNode.CompareNoCase("Given Text //assuming ") == 0 )
                {
                    bRet = TRUE;
                }
            }
                // Go to next sibling item.
                    item.hItem = TreeView_GetNextItem(hWnd, item.hItem, TVGN_NEXT);

        }

        // Free the memory in the remote process's address space
        VirtualFreeEx(hProcess, tvi, 0, MEM_RELEASE);
    }

    GlobalFree(hClipData);
    CloseHandle(hProcess);
    return bRet;
}

By doing this also i m getting the Text of the hItem

Not getting where i m lacking

Help! :)

Posted 22-Jun-10 21:35pm

jagadish015

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Niklas L · Accepted Answer · 2010-06-22T02:34:00

Generally, doing this

BOOL ret = TreeView_GetItem(hWnd, ptvi);

twice without resetting the ptvi->pszText member is a bad idea, since it might tamper with the tree views internal structures.

It can't work since it doesn't even compile, and I would not expect the call to work since it needs to access the ptvi struct which resides in your address space. Maybe a VirtualAlloc there instead of a new?

Assuming of course you're trying to query a tree view in another process.