问题描述

DirectoryEntry oDE = new DirectoryEntry("LDAP://DC=Test1,DC=Test2,DC=gov,DC=lk");

using (DirectorySearcher ds = new DirectorySearcher(oDE))
{
    ds.PropertiesToLoad.Add("name");
    ds.PropertiesToLoad.Add("userPrincipalName");

    ds.Filter = "(&(objectClass=user))";

    SearchResultCollection results = ds.FindAll();

    foreach (SearchResult result in results)
    {
        Console.WriteLine("{0} - {1}",
            result.Properties["name"][0].ToString(),
            result.Properties["userPrincipalName"][0].ToString());
    }
}

在 SearchResultCollection results = ds.FindAll(); 行我得到一个异常:

On the SearchResultCollection results = ds.FindAll(); line I get an exception:

从服务器返回了一个引用

A referral was returned from the server

为什么我会收到该异常，这意味着什么?

Why do I get that exception and what does it mean?

推荐答案

这是问题的答案.原因是我的 LDAP 字符串错误.

This is the answer for the question.Reason for the cause is my LDAP string was wrong.

    try
    {
        string adServer = ConfigurationManager.AppSettings["Server"];
        string adDomain = ConfigurationManager.AppSettings["Domain"];
        string adUsername = ConfigurationManager.AppSettings["AdiminUsername"];
        string password = ConfigurationManager.AppSettings["Password"];
        string[] dc = adDomain.Split('.');
        string dcAdDomain = string.Empty;

        foreach (string item in dc)
        {
            if (dc[dc.Length - 1].Equals(item))
                dcAdDomain = dcAdDomain + "DC=" + item;
            else
                dcAdDomain = dcAdDomain + "DC=" + item + ",";
        }

        DirectoryEntry de = new DirectoryEntry("LDAP://" + adServer + "/CN=Users," + dcAdDomain, adUsername, password);

        DirectorySearcher ds = new DirectorySearcher(de);

        ds.SearchScope = SearchScope.Subtree;

        ds.Filter = "(&(objectClass=User)(sAMAccountName=" + username + "))";

        if (ds.FindOne() != null)
            return true;
    }
    catch (Exception ex)
    {
        ExLog(ex);
    }
    return false;

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