C# 使用 DirectoryVirtualListView 对 ldap 查询结果进行分页答案

【问题标题】：C# using DirectoryVirtualListView to page ldap query resultsC# 使用 DirectoryVirtualListView 对 ldap 查询结果进行分页
【发布时间】：2019-10-25 11:00:46
【问题描述】：

我正在尝试从 LDAP 服务器获取用户。服务器限制为每个响应 200 个结果，我想获取所有超过 5000 的用户。所以我需要进行某种分页。到目前为止，我已经尝试了两种方法：

设置 DirectorySearcher PageSize 属性。这种方法会抛出一个异常，上面写着“[DSA]：需要链接 (DSP) 时无法进行分页”。这是代码

DirectoryEntry rootEntry = new DirectoryEntry("LDAP://server.name");
rootEntry.Username = "cn=any,o=any,dc=any,dc=any";
rootEntry.Password = "thepassword";
rootEntry.AuthenticationType = AuthenticationTypes.FastBind; 
using (DirectorySearcher searcher = new DirectorySearcher(rootEntry))
{
    searcher.PageSize = 50;
    searcher.Filter = "(&(objectClass=person))";
    foreach (SearchResult sr in searcher.FindAll())
    {
        Console.WriteLine(sr.Path);
    }
}

使用 VirtualListView。这也会抛出异常“无法设置VirtualListView属性值”，代码：

DirectoryEntry rootEntry = new DirectoryEntry("LDAP://server.name", "cn=any,o=any,dc=any,dc=any", "any", AuthenticationTypes.FastBind);
using (DirectorySearcher searcher = new DirectorySearcher(rootEntry))
{
    searcher.Filter = "(&(objectClass=person))";
    searcher.Sort = new SortOption("cn", SortDirection.Ascending);
    searcher.VirtualListView = new DirectoryVirtualListView(25);

    foreach (SearchResult sr in searcher.FindAll())
    {
        Console.WriteLine(sr.Path);
    }
}

谁能告诉我我做错了什么？提前致谢。

【问题讨论】：

标签： c# ldap directoryservices

【解决方案1】：

using (var directoryEntry = new DirectoryEntry(@"LDAP://TestDomain")
{
    Username = @"TestDomain\TestUser",
    Password = "T@st#1"
})
{
    var directorySearcher = new DirectorySearcher(directoryEntry)
    {
        VirtualListView = new DirectoryVirtualListView(0, 9, 1)
    };

    // will give you only users with mail
    var filter = "(&(objectCategory=person)(objectClass=user)(mail=*))";

    directorySearcher.Filter = filter;
    directorySearcher.Sort = new SortOption() { PropertyName = "displayname", 
                                                 Direction = SortDirection.Ascending };

    directorySearcher.PropertiesToLoad.Add("displayname");
    directorySearcher.PropertiesToLoad.Add("mail");
    directorySearcher.SearchScope = System.DirectoryServices.SearchScope.Subtree;
    directorySearcher.SizeLimit = 100;

    var results = directorySearcher.FindAll();
    var names = new List<string>();

    foreach (SearchResult r in results)
    {
        // Map the result 
    }
}

您必须使用它，默认情况下它按 cn 对用户进行排序

1. VirtualListView = new DirectoryVirtualListView(0, 9, 1)
2. VirtualListView = new DirectoryVirtualListView(0, 49, 100);

它将为您提供从 0 到 9 的 10 条记录
将从 100 名开始获得 50 名用户。

【讨论】：