当我使用PrincipalSearcher时，我需要分页。我尝试使用基础VirtualListView的{{1}}属性但没有用。
Samplecode：
DirectorySearcher当我直接使用using System;
using System.DirectoryServices;
using System.DirectoryServices.AccountManagement;
using System.Linq;
namespace Testbed
{
internal class Testbed
{
private static void Main(string[] args)
{
Works();
Fails();
Console.ReadKey();
}
private static void Works()
{
var entry = new DirectoryEntry("LDAP://server/DC=example,DC=com", @"USERNAME", "PASSWORD");
var searcher = new DirectorySearcher(entry);
searcher.SearchScope = SearchScope.Subtree;
searcher.Filter = "(cn=*)";
// sort is needed, otherwise DVLV will not work?
searcher.Sort = new SortOption("cn", SortDirection.Ascending);
searcher.VirtualListView = new DirectoryVirtualListView(5, 10, 5);
SearchResultCollection result = searcher.FindAll();
Console.WriteLine("Works: " + result.Count);
}
private static void Fails()
{
var context = new PrincipalContext(ContextType.Domain, "server", "DC=example,DC=com",
ContextOptions.Negotiate,
@"USERNAME", "PASSWORD");
var user = new UserPrincipal(context)
{
DisplayName = null,
};
var searcher = new PrincipalSearcher(user);
((DirectorySearcher) searcher.GetUnderlyingSearcher()).Sort = new SortOption("cn", SortDirection.Ascending);
((DirectorySearcher) searcher.GetUnderlyingSearcher()).VirtualListView = new DirectoryVirtualListView(0, 2, 2);
PrincipalSearchResult<Principal> result = searcher.FindAll();
Console.WriteLine("Fails: " + result.Count());
}
}
}
（方法：DirectorySearcher）时，一切正常，但Works()（方法：PrincipalSearcher）我得到了异常（对不起德语文本）：
Fails()任何解决方案？ PrincipalSearcher甚至可以实现这一点吗？
答案 0 :(得分：3)
PrincipalSearcher的默认页面大小设置为265.尝试将其设置为0，如下所示：
((DirectorySearcher) searcher.GetUnderlyingSearcher()).PageSize = 0;
这应该能够实现分页。 DirectorySearcher的默认PageSize为0，这就是它直接使用时的工作原理。