C#：如何在ADLDS中写入特殊字符？

Question

我正在尝试将联系人写入ADLDS ldap，以便将它们用作Yealink T48G的电话簿。有时，联系人的名称包含一些特殊字符，如"ö“、”？“和"é”。如果这些字符包含在"givenName“或"displayName”字段中，则电话和ldap客户端都不能正确显示它们，而是显示一些其他字符(例如"ö“->”？“)，但是"name”和"dn“字段将正确显示这些字符。

如果我通过ADSI编辑或任何其他工具插入联系人值，电话将正确显示名称，但我的应用程序不再能够从givenName读取插入的特殊字符，并显示一些问号框，但dn和名称字段被正确读取。

我已经尝试使用utf-8、utf-16、utf-32、iso-8859-1和windows-1252作为我的应用程序的编码。

因此，问题是如何在ADLDS实例中的inetOrgPerson的givenName属性中使用C#来存储这些特殊字符？

正确显示：

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显示错误：

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我的代码：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.DirectoryServices.Protocols;
using System.Net;

namespace LdapContacts
{    
    public class LdapClient
    {
        private LdapConnection connection;

        public LdapClient(string host, int port, string distinguishedUsername, string password)
        {
            connection = new LdapConnection(new LdapDirectoryIdentifier(host, port));
            connection.AuthType = AuthType.Basic;
            connection.Credential = new NetworkCredential(distinguishedUsername, password);
            connection.Bind();
        }

        public AddResponse SendAddRequest(string distinguishedName, List<DirectoryAttribute> attributes)
        {
            AddRequest request = new AddRequest(distinguishedName, attributes.ToArray());
            return connection.SendRequest(request) as AddResponse;
        }

        public SearchResponse SendSearchRequest(string distinguishedName, string filter)
        {
            SearchRequest request = new SearchRequest();
            request.DistinguishedName = distinguishedName;
            request.Filter = filter;
            request.Scope = SearchScope.Subtree;
            return connection.SendRequest(request) as SearchResponse;
        }
    }

    public class ContactsToLdap
    {
        private static void Main(string[] args)
        {
            LdapClient client = new LdapClient(Settings.LdapHost, Settings.LdapPort, Settings.LdapUsername, Settings.LdapPassword);

            client.SendAddRequest("CN=Testöäüß,CN=Users,CN=testpart,DC=csdomain,DC=local", new List<DirectoryAttribute>()
            {
                new DirectoryAttribute("telephoneNumber", "0123456"),
                new DirectoryAttribute("objectClass", "inetOrgPerson"),
                new DirectoryAttribute("uid", "io3e"),
                new DirectoryAttribute("givenName", "â é testnameöüÄß")
            });
            //distinguished name of contactsfolder
            SearchResponse result = client.SendSearchRequest(Settings.LdapContactsFolder, "(objectClass=inetOrgPerson)");
            foreach (SearchResultEntry sResult in result.Entries)
            {
                //display the index of the current entry
                Console.Write((result.Entries.IndexOf(sResult) + 1) + ":\n");
                foreach (DirectoryAttribute attribute in sResult.Attributes.Values)
                {
                    //output the name of the attribute
                    Console.Write("\t" + attribute.Name + " = ");
                    for (int i = 0; i < attribute.Count; i++)
                    {
                        // convert the attribute to a string if it is an byte[]
                        // output if inserted with ADSI-Edit: ? ? testname????
                        // output if inserted with this code: â é testnameöüÄß
                        if (attribute[i].GetType().Equals(typeof(byte[])))
                        {
                            Console.Write(Encoding.UTF8.GetString((byte[])attribute[i]) + "; ");
                        }
                        else
                        {
                            Console.Write(attribute[i] + "; ");
                        }
                    }
                    Console.WriteLine();
                }
                Console.WriteLine();
            }
        }
    }
}

Answer 1

已通过将应使用的协议版本设置为版本3解决此问题。

connection = new LdapConnection(new LdapDirectoryIdentifier(host, port));
connection.SessionOptions.ProtocolVersion = 3;