public class ADHelper

	{



		#region fields



		/// <summary>

		/// 绑定路径

		/// </summary>

		protected static string ADPath = ADConfiguration.Config.ADPath;

		/// <summary>

		/// 管理员登录帐号

		/// </summary>

		protected static string ADUser = ADConfiguration.Config.ADUser;



		/// <summary>

		/// 管理员登录密码

		/// </summary>

		protected static string ADPassword = ADConfiguration.Config.ADPassword;

		

		

		#endregion



		public ADHelper()

		{

			//

			// TODO: 在此处添加构造函数逻辑

			//

		}



		#region create directoryentry



		/// <summary>

		/// 以管理员身份获得 DirectoryEntry 对象实例

		/// </summary>

		/// <returns>DirectoryEntry 对象实例</returns>

		protected static DirectoryEntry CreateDirectoryEntry()

		{

			return CreateDirectoryEntry(ADPath);

		}





		/// <summary>

		/// 获得相应DirectoryEntry 对象实例

		/// </summary>

		/// <param name="path">路径</param>

		/// <returns></returns>

		protected static DirectoryEntry CreateDirectoryEntry(string path)

		{

			DirectoryEntry entry = new DirectoryEntry(path);

			return entry;

		}





		/// <summary>

		/// 根据指定用户名和密码获得相应 DirectoryEntry 对象实例

		/// </summary>

		/// <param name="userName">用户名</param>

		/// <param name="password">密码</param>

		/// <returns>DirectoryEntry 对象实例</returns>

		protected static DirectoryEntry CreateDirectoryEntry(string userName, string password)

		{

			return CreateDirectoryEntry(ADPath, userName, password);

		}





		/// <summary>

		/// 获得以指定路径、用户名和密码创建的 DirectoryEntry 对象实例

		/// </summary>

		/// <param name="path">路径</param>

		/// <param name="userName">用户名</param>

		/// <param name="password">密码</param>

		/// <returns>DirectoryEntry 对象实例</returns>

		protected static DirectoryEntry CreateDirectoryEntry(string path, string userName, string password)

		{

			DirectoryEntry entry = new DirectoryEntry(path, userName, password, AuthenticationTypes.Secure);

			return entry;

		}





		/// <summary>

		/// 根据查询字符串取得 DirectoryEntry 对象实例

		/// </summary>

		/// <param name="filterString"></param>

		/// <returns>如果找到该对象，则返回用户的 DirectoryEntry 对象；否则返回 null</returns>

		public static DirectoryEntry FindObject(string filterString)

		{

			DirectoryEntry dirEntry = CreateDirectoryEntry();

			DirectorySearcher deSearch = new DirectorySearcher(dirEntry);

			deSearch.SearchScope = SearchScope.Subtree;

			deSearch.Filter = filterString;

			try

			{

				SearchResult result = deSearch.FindOne();

				dirEntry = result.GetDirectoryEntry();

				return dirEntry;

			}

			catch

			{

				return null;

			}

		}



		/// <summary>

		/// 根据查询字符串取得所有的 DirectoryEntry 对象实例

		/// </summary>

		/// <param name="rootDirEntry"></param>

		/// <param name="filterString">查询字符串</param>

		/// <returns>所有的 DirectoryEntry 对象</returns>

		public static DirectoryEntry[] FindObjects( string filterString)

		{

			DirectoryEntry dirEntry = CreateDirectoryEntry();

			DirectorySearcher deSearch = new DirectorySearcher(dirEntry);

			deSearch.Filter = filterString;

			deSearch.SearchScope = SearchScope.Subtree;

			try

			{

				SearchResultCollection results = deSearch.FindAll();

				int i = 0, count = results.Count;

				DirectoryEntry[] resultDirs = new DirectoryEntry[count];

				foreach(SearchResult e in results)

				{

					resultDirs[i++] = e.GetDirectoryEntry();

				}

				return resultDirs;

			}

			catch

			{

				return null;

			}

		}



		#endregion



		#region property value



		/// <summary>

		/// 获得指定属性名对应的值

		/// </summary>

		/// <param name="de">属性名称</param>

		/// <param name="propertyName">属性值</param>

		/// <returns></returns>

		public static string GetPropertyValue(DirectoryEntry de, string propertyName)

		{

			if(de.Properties.Contains(propertyName))

			{

				return de.Properties[propertyName][0].ToString() ;

			}

			else

			{

				return string.Empty;

			}



		}



		/// <summary>

		/// 获得指定搜索结果中指定属性名对应的值

		/// </summary>

		/// <param name="searchResult">指定搜索结果</param>

		/// <param name="propertyName">属性名称</param>

		/// <returns>属性值</returns>

		public static string GetPropertyValue(SearchResult searchResult, string propertyName)

		{

			if(searchResult.Properties.Contains(propertyName))

			{

				return searchResult.Properties[propertyName][0].ToString() ;

			}

			else

			{

				return string.Empty;

			}

		}

		



		#endregion

	}