问题描述

我希望能够使用该用户的显示名称在 Active Directory 中获取该用户的用户 ID.显示名称是从数据库中获取的，并在该用户的会话期间使用以下代码存储以获取显示名称:

I want to be able to obtain the userid of a user in Active Directory using the display name of that user. The display name is obtained from a database, and has been stored during that user's session using the following code to obtain the display name:

using System.DirectoryServices.AccountManagement;

    private string GetDisplayName()
    {
        // set up domain context
        PrincipalContext ctx = new PrincipalContext(ContextType.Domain);

        // find currently logged in user
        UserPrincipal user = UserPrincipal.Current;

        return user.DisplayName;
    }

这一次，我想要一个名为 GetUserIdFromDisplayName() 的方法来返回 Active Directory 登录名.有什么想法吗?

This time around, I would like to have a method named GetUserIdFromDisplayName() that returns the Active Directory login name. Any ideas?

推荐答案

我相信通过使用 System.DirectoryServices.AccountManagement (SDS.AM) 命名空间.

I believe you can do it much more easily than with David's answer by using the built-in functionality of the System.DirectoryServices.AccountManagement (S.DS.AM) namespace.

基本上，您可以定义域上下文并轻松找到 AD 中的用户和/或组:

Basically, you can define a domain context and easily find users and/or groups in AD:

using System.DirectoryServices.AccountManagement;

private string GetUserIdFromDisplayName(string displayName)
{
    // set up domain context
    using(PrincipalContext ctx = new PrincipalContext(ContextType.Domain))
    {
        // find user by display name
        UserPrincipal user = UserPrincipal.FindByIdentity(ctx, displayName);

        // 
        if (user != null)
        {
             return user.SamAccountName;
             // or maybe you need user.UserPrincipalName;
        }
        else
        {
             return string.Empty;
        }
    }
}

我认为没有必要访问底层的 DirectoryEntry 对象，真的 - 除非 UserPrincipal 的所有属性都不是您真正需要的.

I don't see any need to go to the underlying DirectoryEntry object, really - unless none of the properties of the UserPrincipal really are what you're looking for.

PS:如果按显示名称搜索不起作用(我手头没有 AD 来测试它) - 您也可以随时使用 PrincipalSearcher 来查找您的用户:

PS: if the search by display name shouldn't work (I don't have an AD at hand to test it right now) - you can always also use the PrincipalSearcher to find your user:

using System.DirectoryServices.AccountManagement;

private string GetUserIdFromDisplayName(string displayName)
{
    // set up domain context
    using(PrincipalContext ctx = new PrincipalContext(ContextType.Domain))
    {
        // define a "query-by-example" principal - here, we search for a UserPrincipal 
        // and with the display name passed in
        UserPrincipal qbeUser = new UserPrincipal(ctx);
        qbeUser.DisplayName = displayName;

        // create your principal searcher passing in the QBE principal    
        PrincipalSearcher srch = new PrincipalSearcher(qbeUser);

        // find match - if exists
        UserPrincipal user = srch.FindOne() as UserPrincipal;

        if (user != null)
        {
             return user.SamAccountName;
             // or maybe you need user.UserPrincipalName;
        }
        else
        {
             return string.Empty;
        }
    }
}

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