.NET:如何在 Active Directory 中查找用户？

Question

如何在 Active Directory 中查找用户？

一些示例用户名是:

avatopia\ian

头像\ian

ian@avatopia.com

ian@avatopia.local

avatopia.com\ian

需要注意的是，我不知道域的名称，and i shouldn't be hard-coding it .

有一些sample code on stack-overflow那失败了。

using System.DirectoryServices;

/// <summary>
/// Gets the email address, if defined, of a user from Active Directory.
/// </summary>
/// <param name="userid">The userid of the user in question.  Make
/// sure the domain has been stripped first!</param>
/// <returns>A string containing the user's email address, or null
/// if one was not defined or found.</returns>
public static string GetEmail(string userid)
{
    DirectorySearcher searcher;
    SearchResult result;
    string email;

    // Check first if there is a slash in the userid
    // If there is, domain has not been stripped
    if (!userid.Contains("\\"))
    {
        searcher = new DirectorySearcher();
        searcher.Filter = String.Format("(SAMAccountName={0})", userid);
        searcher.PropertiesToLoad.Add("mail");
        result = searcher.FindOne();
        if (result != null)
        {
            email = result.Properties["mail"][0].ToString();
        }
    }

    return email;
}

它特别确保您没有传递完整的用户名。例如

Bad: avatopia\ian
Bad: avatar\ian
Good: ian
Good: ian

因为不允许你传域，所以无法区分两个用户

ian
ian

另一个人有 the same question在 sackoverflow 上，但接受的答案说你必须

first locate the naming context for the required domain

我 don't know什么是“命名上下文”，我不知道“所需域”是什么。我真的宁愿不编写正则表达式来尝试将用户名解析为域名和帐户名，例如

domain.something\user-name

进入

domain.something
user-name

因为我知道会有一些边缘情况我会出错。我想要在事件目录中查找用户的正确的、预期的方法。

CodeProject 上有一个不错的页面 How to do almost everything in Active Directory ，但不能通过用户名查找用户信息

我希望我可以给我的域 Controller ( whoever it is, where ever it is, whatever it's called ) 一个用户名，它会找出该用户属于哪个域，与该域 Controller 交谈，并完成工作。

Answer 1

这对我有用。

您应该能够区分不同域 Controller (即域/用户名)上的不同用户，因为 ldappaths 会有所不同。据你说你不在乎，因为你是not specifying an ldappath .

您正在就剥离 User.Identity.Name 的域/进行出价交易。但我不确定你在担心什么，你只需要把字符串切成两半，第一次遇到 '\' 是时候切了。

如果你不喜欢，你可以使用“正确的方式”:http://msdn.microsoft.com/en-us/library/ms973834.aspx

这个也不错 http://geekswithblogs.net/mhamilton/archive/2005/09/30/55621.aspx

      /// This is some imaginary code to show you how to use it

      Session["USER"] = User.Identity.Name.ToString();
      Session["LOGIN"] = RemoveDomainPrefix(User.Identity.Name.ToString()); // not a real function :D
      string ldappath = "LDAP://your_ldap_path";
      // "LDAP://CN=<group name>, CN =<Users>, DC=<domain component>, DC=<domain component>,..."


      Session["cn"] = GetAttribute(ldappath, (string)Session["LOGIN"], "cn");
      Session["displayName"] = GetAttribute(ldappath, (string)Session["LOGIN"], "displayName");
      Session["mail"] = GetAttribute(ldappath, (string)Session["LOGIN"], "mail");
      Session["givenName"] = GetAttribute(ldappath, (string)Session["LOGIN"], "givenName");
      Session["sn"] = GetAttribute(ldappath, (string)Session["LOGIN"], "sn");


/// working code

public static string GetAttribute(string ldappath, string sAMAccountName, string attribute)
    {
        string OUT = string.Empty;

        try
        {
            DirectoryEntry de = new DirectoryEntry(ldappath);
            DirectorySearcher ds = new DirectorySearcher(de);
            ds.Filter = "(&(objectClass=user)(objectCategory=person)(sAMAccountName=" + sAMAccountName + "))";

            SearchResultCollection results = ds.FindAll();

            foreach (SearchResult result in ds.FindAll())
            {
                OUT =  GetProperty(result, attribute);
            }
        }
        catch (Exception t)
        {
            // System.Diagnostics.Debug.WriteLine(t.Message);
        }

        return (OUT != null) ? OUT : string.Empty;
    }

public static string GetProperty(SearchResult searchResult, string PropertyName)
    {
        if (searchResult.Properties.Contains(PropertyName))
        {
            return searchResult.Properties[PropertyName][0].ToString();
        }
        else
        {
            return string.Empty;
        }
    }

对于域/用户名

    public static string GetDomain(string s)
    {
        int stop = s.IndexOf("\\");
        return (stop > -1) ?  s.Substring(0, stop + 1) : null;
    }

    public static string GetLogin(string s)
    {
        int stop = s.IndexOf("\\");
        return (stop > -1) ? s.Substring(stop + 1, s.Length - stop - 1) : null;
    }

对于 username@domain 样式

   public static string GetDomain(string s) //untested
    {
        int stop = s.IndexOf("@");
        return (stop > -1) ? s.Substring(stop + 1, s.Length - stop - 1) : null;
    }


    public static string GetLogin(string s) //untested
    {
        int stop = s.IndexOf("@");
        return (stop > -1) ?  s.Substring(0, stop) : null;
    }