读取注册表根据Office版本获取数据库连接字段

/// <summary> 
/// 读取注册表，根据Office版本获取数据库连接字段 
/// </summary> 
/// <returns>数据库连接字段</returns> 
private string GetConnectionString() 
{ 
  string strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = "; 
 
  RegistryKey rk = Registry.LocalMachine; 
  //查询Office2003 
  RegistryKey f03 = rk.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\.0\\Access\\InstallRoot\\"); 
  //查询Office2007 
  RegistryKey f07 = rk.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\.0\\Access\\InstallRoot\\"); 
  //查询Office2010 
  RegistryKey f10 = rk.OpenSubKey(@"SOFTWARE\\Microsoft\\Office\.0\\Access\\InstallRoot\\"); 
 
  if (f03 != null) 
  { 
    strConnectionString = "Provider=Microsoft.Jet.OLEDB.4.0;Data Source = "; 
  } 
  else if (f07 != null || f10 != null) 
  { 
    strConnectionString = "Provider=Microsoft.ACE.OLEDB.12.0;Data Source = "; 
  } 
 
  return strConnectionString; 
}