namespace BLL
{
    using System;
    using System.DirectoryServices;

    public class ADomainService
    {         
        #region 是否连接到域
        /// <summary>
        /// </summary>
        /// <param name="domainName">域名或IP</param>
        /// <param name="userName">用户名</param>
        /// <param name="userPwd">密码</param>
        /// <returns>域</returns>
        public static DirectoryEntry IsConnected(string domainName, string userName, string userPwd)
        {
            DirectoryEntry domain = new DirectoryEntry();
            try
            {
                domain.Path = string.Format("LDAP://{0}", domainName);
                domain.Username = userName;
                domain.Password = BLL.CommonService.Base64Decode(userPwd);
                //domain.AuthenticationType = AuthenticationTypes.None;
                domain.RefreshCache();
                return domain;
            }
            catch (Exception ex)
            {
                BLL.ErrLogInfo.WriteLog(ex.ToString());
                return null;
            }
        }
        #endregion

        #region 域中是否存在组织单位
        /// <summary>       
        /// </summary>
        /// <param name="entry"></param>
        /// <param name="ou"></param>
        /// <returns></returns>
        public static DirectoryEntry IsExistOU(DirectoryEntry entry, string domainName, string domainOU)
        {
            DirectoryEntry ou = new DirectoryEntry();
            try
            {
                string[] ouItem = domainOU.Split(new string[1] { "/" }, StringSplitOptions.RemoveEmptyEntries);
                foreach (var item in ouItem)
                {
                    if (!item.Equals(domainName, StringComparison.OrdinalIgnoreCase) && !item.Equals(domainName + ".com", StringComparison.OrdinalIgnoreCase))
                    {
                        entry = entry.Children.Find("OU=" + item);
                        ou = entry;
                    }
                }

                return ou;
            }
            catch (Exception ex)
            {
                BLL.ErrLogInfo.WriteLog(ex.ToString());
                return null;
            }
        }
        #endregion  
    }
}