c# - 获取分页 DirectorySearcher 的搜索结果总数

Question

我正在使用 DirectorySearch 在 Active Directory 中搜索对象。我将 VirtualListView 属性设置为只返回几个值:

using System;
using System.DirectoryServices;

namespace Testbed
{
    internal class Testbed
    {
        private static void Main()
        {
            DoSearch();
            Console.ReadKey();
        }

        private static void DoSearch()
        {
            var entry = new DirectoryEntry("LDAP://server/DC=mydomain,DC=com", @"USERNAME", "PASSWORD");
            var searcher = new DirectorySearcher(entry)
            {
                PageSize = 0,
                SearchScope = SearchScope.Subtree,
                Filter = "(Description=J_*)",
                Sort = new SortOption("Description", SortDirection.Ascending),
                VirtualListView = new DirectoryVirtualListView(0, 9, 1)
            };

            SearchResultCollection results = searcher.FindAll();
            foreach (SearchResult result in results)
            {
                Console.WriteLine(result.Properties["Description"][0]);
            }
            Console.WriteLine("Found: " + results.Count);
        }
    }
}

有没有一种方法可以在不执行显式DirectorySearch的情况下获取AD中查询的对象总数-“调用”相应的PageSize(例如500 )?

Answer 1

DirectoryVirtualListView 类中有一个ApproximateTotal 属性。您可以使用它，但请记住您应该在代码中的 foreach block 之后访问它。只需更改此行:

Console.WriteLine("Found: " + results.Count);

这个:

Console.WriteLine("Found: " + searcher.VirtualListView.ApproximateTotal);

全部完成!