VC 打开文件

UpdateData(TRUE);
CFileDialog fileDlg(TRUE);
TCHAR DesktopPath[_MAX_PATH];
SHGetSpecialFolderPath(this->GetSafeHwnd(),MyDir,CSIDL_DESKTOP,0);
fileDlg.m_ofn.lpstrInitialDir=DesktopPath;
fileDlg.m_ofn.lpstrTitle=_T("打开");
fileDlg.m_ofn.lpstrFilter=_T("Execl File\0*.xls;*.xlsx;*.csv\0\0All Files\0*.*\0\0");
fileDlg.m_ofn.lpstrDefExt=_T("Execl File\0*.xls;*.xlsx;*.csv\0\0");
if(IDOK==fileDlg.DoModal())
{
CFile file(fileDlg.GetPathName(),CFile::modeRead);
CString strFile =fileDlg.GetFileName();
GetDlgItem(IDC_EDIT1)->SetWindowText(strFile);
UpdateData(FALSE);
}