助手类和枚举
public enum ActiveDirectoryObjectClass
{
Computer,
User,
Domain,
Group,
}
public static class ActiveDirectorySearcher
{
public static string GetCurrentDomainName()
{
string result;
using (Domain domain = Domain.GetCurrentDomain())
{
result = domain.Name;
}
return result;
}
public static IEnumerable<T> Select<T>(
ActiveDirectoryObjectClass activeDirectoryObjectClass,
Func<DirectoryEntry, ActiveDirectoryObjectClass, bool> condition,
Func<DirectoryEntry, T> selector
)
{
List<T> list = new List<T>();
using (Domain domain = Domain.GetCurrentDomain())
using (DirectoryEntry root = domain.GetDirectoryEntry())
{
string filter = string.Format("(objectClass={0})", activeDirectoryObjectClass);
using (DirectorySearcher searcher = new DirectorySearcher(filter))
{
searcher.SearchRoot = root;
searcher.SearchScope = SearchScope.Subtree;
using (SearchResultCollection result = searcher.FindAll())
{
foreach (SearchResult item in result)
{
using (DirectoryEntry entry = item.GetDirectoryEntry())
{
if (condition(entry, activeDirectoryObjectClass))
{
list.Add(selector(entry));
}
}
}
}
}
}
return list;
}
}
如何使用
public IEnumerable<User> GetUsers()
{
return ActiveDirectorySearcher.Select(
ActiveDirectoryObjectClass.User,
(entry, adObjectClass) => string.Compare(entry.SchemaClassName, adObjectClass.ToString(), StringComparison.InvariantCultureIgnoreCase) == 0,
_ => new User
{
Name = _.Name.Substring(3),
Domain = ActiveDirectorySearcher.GetCurrentDomainName(),
});
}
注意:示例中的用户 - 具有名称、域等属性的自定义类。