C# LDAP 查询以检索组织单位中的所有用户

Question

我正在尝试运行 LDAP 查询，该查询将返回属于组织单位 OU=Employees 和 OU=FormerEmployees 的所有用户，但我一无所获.

我尝试使用 distinguishedName 进行搜索，但它似乎不支持通配符。我知道必须有更简单的方法，但我的搜索工作没有产生任何结果

Answer 1

如果您使用的是 .NET 3.5 及更新版本，则可以使用 PrincipalSearcher和一个“按示例查询”的主体来进行搜索:

// create your domain context and define what container to search in - here OU=Employees
PrincipalContext ctx = new PrincipalContext(ContextType.Domain, "YOURDOMAIN", "OU=Employees,DC=YourCompany,DC=com");

// define a "query-by-example" principal - here, we search for a UserPrincipal 
// that is still active
UserPrincipal qbeUser = new UserPrincipal(ctx);
qbeUser.Enabled = true;

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

// find all matches
foreach(var found in srch.FindAll())
{
    // do whatever here - "found" is of type "Principal" - it could be user, group, computer.....          
}

如果您还没有-绝对阅读 MSDN 文章 Managing Directory Security Principals in the .NET Framework 3.5这很好地展示了如何充分利用 System.DirectoryServices.AccountManagement 中的新功能

如果您更喜欢“旧的”.NET 2.0 风格，则需要创建一个基础 DirectoryEntry对应于您要在其中枚举对象的 OU，然后您需要创建一个 DirectorySearcher搜索对象 - 像这样:

// create your "base" - the OU "FormerEmployees"
DirectoryEntry formerEmployeeOU = new DirectoryEntry("LDAP://OU=FormerEmployees,DC=YourCompany,DC=com");

// create a searcher to find objects inside this container
DirectorySearcher feSearcher = new DirectorySearcher(formerEmployeeOU);

// define a standard LDAP filter for what you search for - here "users"    
feSearcher.Filter = "(objectCategory=user)";

// define the properties you want to have returned by the searcher
feSearcher.PropertiesToLoad.Add("distinguishedName");
feSearcher.PropertiesToLoad.Add("sn");
feSearcher.PropertiesToLoad.Add("givenName");
feSearcher.PropertiesToLoad.Add("mail");

// search and iterate over results
foreach (SearchResult sr in feSearcher.FindAll())
{
    // for each property, you need to check where it's present in sr.Properties
    if (sr.Properties["description"] != null && sr.Properties["description"].Count > 0)
    {
       string description = sr.Properties["description"][0].ToString();
    }
}