how to get all members in channel?

[elmagekmosaad]

how to get all members in channel?

[nazmotka]

You need a channel id and hash to get things done, here is a code sample:
var request = new TLRequestGetParticipants { offset = offset, limit = limit, channel = new TLInputChannel { access_hash = channelHash, channel_id = channelId }, filter = new TLChannelParticipantsRecent() }; TLChannelParticipants found = await client.SendRequestAsync<TLChannelParticipants>(request);

[elmagekmosaad]

can u tell me whene i can get chanal hash?
and
can u give me code vb.net not #c ?

[nazmotka]

Sorry, I haven't written any vb.net code, but there must be online tools for code conversion. Here is simplified c# code you can use to get the hash:

TLFound found = await client.SearchUserAsync(channelName, 1);
 var channel = found.chats.lists.OfType<TLChannel>().FirstOrDefault();
if (channel != null)
{
   //channel object will contain 'id' and 'access_hash' properties you need
}

[elmagekmosaad]

ok thanks

[parabola949]

You'll also need to use offsets to get all the members, if a large group. Here's a snippet from one of my projects, though I like how @an2114 is getting the hash better, I'll probably use that :)
(note - I used the string groupname for a reason, I am well aware of how to use ids. I'd recommend using the id)

public static async Task<ChannelInfo> GetChatInfo(string groupName)
        {
            if (! await AuthUser()) return null;
            var result = new ChannelInfo();
            var dialogs = (TLDialogs)await client.GetUserDialogsAsync();
            var main = dialogs.chats.lists.Where(c => c.GetType() == typeof(TLChannel))
                        .Cast<TLChannel>()
                        .FirstOrDefault(c => c.title == (groupName));
            var req = new TLRequestGetFullChannel()
            {
                channel = new TLInputChannel() { access_hash = main.access_hash.Value, channel_id = main.id }
            };
             
            var res = await client.SendRequestAsync<TeleSharp.TL.Messages.TLChatFull>(req);

            //we have to do this in slices
            var offset = 0;
            result.Channel = main;
            result.ChatFull = res;
            while (offset < (res.full_chat as TLChannelFull).participants_count)
            {
                var pReq = new TLRequestGetParticipants()
                {
                    channel = new TLInputChannel() { access_hash = main.access_hash.Value, channel_id = main.id },
                    filter = new TLChannelParticipantsRecent() { },
                    limit = 200,
                    offset = offset
                };
                var pRes = await client.SendRequestAsync<TLChannelParticipants>(pReq);
                result.Users.AddRange(pRes.users.lists.Cast<TLUser>());
                offset += 200;
                await Task.Delay(500);
            }

            return result;
        }

Channelnfo() was just a quick class I made, modify as needed of course

public class ChannelInfo
    {
        public TLChannel Channel { get; set; }
        public TeleSharp.TL.Messages.TLChatFull ChatFull { get; set; }
        public List<TLUser> Users { get; set; } = new List<TLUser>();

        private DateTime _dateCreated;
        public DateTime DateCreated
        {
            get { return _dateCreated; }
            set
            {
                _dateCreated = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc).AddSeconds(Channel.date).ToLocalTime();
            }
        }
    }

[hosseinGanjyar]

I've error: "CHAT_ADMIN_REQUIRED"

[nazmotka]

That happens because of a security configuration of a channel that means a user is not allowed to view the members. You can see the same behavior in different Telegram clients (e.g. a desktop or web app).

[hosseinGanjyar]

Many times TLRequestGetParticipants return 1 more record. That's mean if I want to get 200 of 4200 contacts, many times get 201 contacts in result....!!!
@knocte ,This is bug of TELESHARP

[knocte]

@hosseinGanjyar good catch! please propose a pull-request to fix it

[ghost]

also where can i put these codes?

[knocte]

We don't use github issues as a forum but to report bugs, so I'm closing this. If you want to have a more forum-like experience, you can ask questions in our gitter and telegram channels.

[evo11x]

It is blocking in this line forever
var dialogs = (TLDialogs)await client.GetUserDialogsAsync();
and no error