MFC拖拽、选择目录、遍历文件

1.选择目录

void CDecryptFileDlg::OnBnClickedSel()
{
    std::wstring selectedDir;
    WCHAR szDir[MAX_PATH];
    ZeroMemory(szDir, sizeof(szDir));
    BROWSEINFO bi;
    bi.hwndOwner = m_hWnd;
    bi.pidlRoot = NULL;
    bi.pszDisplayName = szDir;
    bi.lpszTitle = L"请选择目录：";
    bi.ulFlags = 0;
    bi.lpfn = NULL;
    bi.lParam = 0;
    bi.iImage = 0;
    //选择目录
    LPITEMIDLIST lp = SHBrowseForFolder(&bi);
    if(lp && SHGetPathFromIDList(lp, szDir))
    {
        selectedDir = szDir;
        selectedDir += L"\\";
    } 

    SetDlgItemText(IDC_PATH, selectedDir.c_str());
}

2.拖拽文件

void CDecryptFileDlg::OnDropFiles(HDROP hDropInfo)
{
    int DropCount = DragQueryFile(hDropInfo, -1, NULL, 0);
    for(int i = 0; i < DropCount; i++)
    {
        WCHAR wcStr[MAX_PATH];
        DragQueryFile(hDropInfo, i, wcStr, MAX_PATH);
                //字符串拼接请自行处理
        SetDlgItemText(IDC_PATH, wcStr);
    }
    DragFinish(hDropInfo);
}    

3.遍历文件夹

void CDecryptFileDlg::BrowseCurrentAllFile(wstring strDir)
{
    if(strDir.empty())
    {
        return;
    }
    else
    {
        if(strDir[strDir.length()-1] != L'\\')
        {
            strDir += L"\\";
        }
        strDir = strDir + L"*.*";
    }

    CFileFind finder;
    wstring strPath;
    BOOL bWorking = finder.FindFile(strDir.c_str());
    while(bWorking)
    {
        bWorking = finder.FindNextFile();
        strPath = finder.GetFilePath();
        if(finder.IsDirectory() && !finder.IsDots())
        {
            BrowseCurrentAllFile(strPath); //递归调用
        }
        else if(!finder.IsDirectory() && !finder.IsDots())
        {
            //strPaht就是所要获取的文件路径
            DecryptFile(strPath);
        }
    }
}