asp.net – System.DirectoryServices – 服务器不可操作

我收到一个网站的错误,我使用 Windows身份验证.

奇怪的东西：

>仅当用户尚未保存到数据库(新的未知用户)时才会发生
>只出现在现场系统上,一切都在本地开发环境中

这是我在日志邮件中得到的：

Source : System.DirectoryServices

Message: The server is not operational.

Trace:
at System.DirectoryServices.DirectoryEntry.Bind(Boolean throwIfFail)
at System.DirectoryServices.DirectoryEntry.Bind()
at System.DirectoryServices.DirectoryEntry.get_AdsObject()
at System.DirectoryServices.DirectorySearcher.FindAll(Boolean findMoreThanOne)
at System.DirectoryServices.DirectorySearcher.FindOne()
at Smarthouse.Labs.DataAccess.UserListManager.SaveUser(String windowsUserName)

这是我如何实现DirectorySearch：

private void SaveUser(string windowsUserName)
{
    string[] domainAndUser = windowsUserName.Split('\\');
    string domain = domainAndUser[0];
    string username = domainAndUser[1];

    DirectoryEntry entry = new DirectoryEntry("LDAP://" + domain);
    DirectorySearcher search = new DirectorySearcher(entry);

    try
    {
        // Bind to the native AdsObject to force authentication.
        search.Filter = "(SAMAccountName=" + username + ")";
        search.PropertiesToLoad.Add("cn");
        search.PropertiesToLoad.Add("sn");
        search.PropertiesToLoad.Add("givenname");
        search.PropertiesToLoad.Add("mail");

        SearchResult result = search.FindOne();

        if (result == null)
        {
            throw new Exception("No results found in Windows authentication.");
        }

        User userToSave = new User();
        userToSave.FirstName = (String) result.Properties["givenname"][0];
        userToSave.LastName = (String) result.Properties["sn"][0];
        userToSave.Email = (String) result.Properties["mail"][0];
        userToSave.Username = windowsUserName;
        userToSave.Guid = Guid.NewGuid();

        SaveUser(userToSave);
    }
    catch (Exception ex)
    {
        throw new Exception("Error authenticating user. " + ex.Message,ex);
    }
    finally
    {
        //dispose service and search to prevent leek in memory
        entry.dispose();
        search.dispose();
    }
}

如果需要更多的代码示例,请告诉我.

解决方法

您的问题是您正在使用“简单”域名进行绑定 – 这在LDAP中不起作用.实际上,如果你尝试绑定到LDAP：// MyDomain,你真正在做的是试图绑定到名为MyDomain的服务器.

您需要一个有效的LDAP绑定字符串,如LDAP：// dc = yourdomain,dc = local或something.

要了解您的默认LDAP绑定上下文是什么,请使用此代码段：

DirectoryEntry deRoot = new DirectoryEntry("LDAP://RootDSE");

if (deRoot != null)
{
   string defaultNamingContext = deRoot.Properties["defaultNamingContext"].Value.ToString();
}

一旦你有这个字符串 – 将它用作你的LDAP服务器的绑定字符串.

如果您使用的是.NET 3.5及更高版本,则应查看System.DirectoryServices.AccountManagement(S.DS.AM)命名空间.在这里阅读全文：

> Managing Directory Security Principals in the .NET Framework 3.5
> MSDN docs on System.DirectoryServices.AccountManagement

基本上,您可以定义域上下文并轻松查找AD中的用户和/或组：

// set up domain context -- no domain name needed,uses default domain 
PrincipalContext ctx = new PrincipalContext(ContextType.Domain);

// find a user
UserPrincipal user = UserPrincipal.FindByIdentity(ctx,username);

if(user != null)
{
   // do something here....     
}

新的S.DS.AM让您很容易在广告中与用户和群体一起玩耍！