/// <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\11.0\Access\InstallRoot\");   //查询Office2007   RegistryKey f07 = rk.OpenSubKey(@"SOFTWARE\Microsoft\Office\12.0\Access\InstallRoot\");   //查询Office2010   RegistryKey f10 = rk.OpenSubKey(@"SOFTWARE\Microsoft\Office\14.0\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; }