How to listen new message / use handle update?

[munrocket]

According to #361 #43 right way to get new messages is TLRequestGetDifference or HandleUpdate usage. Also we can find official manual about processing updates: https://core.telegram.org/api/updates
Here we need an source code example. Same questions: #564 #239 #436 #457 #524 #538 #547 #570

[munrocket]

If you need to catch new message from user or group after authorizing, you can check status in simple loop without getting FLOOD_EXCEPTION. But this not working with channels.

while (true) {
   var state = await telegram.SendRequestAsync<TLState>(new TLRequestGetState());
   if (state.unread_count > 0) { ... }
   await Task.Delay(500);
}

[munrocket]

In general you need to create test channel, test group and second user and check whats happends with this code pattern (or try to use PUSH notification https://core.telegram.org/api/push-updates with TeleSharp.TL.Account.TLRequestRegisterDevice). General testing pattern:

while (true)
{
    var state = await telegram.SendRequestAsync<TLState>(new TLRequestGetState());
    var req = new TLRequestGetDifference() { date = state.date, pts = state.pts, qts = state.qts };
    var adiff = await telegram.SendRequestAsync<TLAbsDifference>(req);
    if (!(adiff is TLDifferenceEmpty))
    {
        if (adiff is TLDifference)
        {
            var diff = adiff as TLDifference;
            Console.WriteLine("chats:" + diff.chats.lists.Count);
            Console.WriteLine("encrypted:" + diff.new_encrypted_messages.lists.Count);
            Console.WriteLine("new:" + diff.new_messages.lists.Count);
            Console.WriteLine("user:" + diff.users.lists.Count);
            Console.WriteLine("other:" + diff.other_updates.lists.Count);
        }
        else if (adiff is TLDifferenceTooLong)
            Console.WriteLine("too long");
        else if (adiff is TLDifferenceSlice)
            Console.WriteLine("slice");
    }
    await Task.Delay(500);
}

[munrocket]

Finnaly I use this code for reading my channels and mark message as read

while (true)
{
    var state = await telegram.SendRequestAsync<TLState>(new TLRequestGetState());
    var req = new TLRequestGetDifference() { date = state.date, pts = state.pts, qts = state.qts };
    var diff = await telegram.SendRequestAsync<TLAbsDifference>(req) as TLDifference;
    if (diff != null)
    {
        foreach (var upd in diff.other_updates.lists.OfType<TLUpdateNewChannelMessage>())
            Console.WriteLine((upd.message as TLMessage).message);

        foreach(var ch in diff.chats.lists.OfType<TLChannel>().Where(x => !x.left))
        {
            var ich = new TLInputChannel() { channel_id = ch.id, access_hash = (long)ch.access_hash };
            var readed = new TeleSharp.TL.Channels.TLRequestReadHistory() { channel = ich, max_id = -1 };
            await telegram.SendRequestAsync<bool>(readed);
        }
    }
    await Task.Delay(500);
}

[Rman77]

        while (true)
        {
            var state = await client.SendRequestAsync<TLState>(new TLRequestGetState());
            var req = new TLRequestGetDifference() { date = state.date, pts = state.pts, qts = state.qts };
            var diff = await client.SendRequestAsync<TLAbsDifference>(req) as TLDifference;

            if (diff != null) {
                foreach (var x in diff.new_messages.lists.OfType<TLUpdateNewMessage>())
                {
                    listBox1.Items.Add((x.message as TLMessage).message);
                }
            }
            await Task.Delay(500);
        }

why my code doesn't work ? @mirror-neuron

[snrchang]

so "upd.message as TLMessage).message" get you the message but how would u get a photo in the message or know what channel the message came from?
Please help a brother out.

[snrchang]

munrocket thats nothing to do with the question i asked sir.

[snrchang]

while (true)
{
var state = await telegram.SendRequestAsync(new TLRequestGetState());
var req = new TLRequestGetDifference() { date = state.date, pts = state.pts, qts = state.qts };
var diff = await telegram.SendRequestAsync(req) as TLDifference;
if (diff != null)
{
foreach (var upd in diff.other_updates.lists.OfType())
Console.WriteLine((upd.message as TLMessage).message);

    foreach(var ch in diff.chats.lists.OfType<TLChannel>().Where(x => !x.left))
    {
        var ich = new TLInputChannel() { channel_id = ch.id, access_hash = (long)ch.access_hash };
        var readed = new TeleSharp.TL.Channels.TLRequestReadHistory() { channel = ich, max_id = -1 };
        await telegram.SendRequestAsync<bool>(readed);
    }
}
await Task.Delay(500);

}
This code is ideal but i would like to accept photos and get the name of the channel of the incoming message.

thanks

[GodSpeedXI]

Someone Please give me an example how to use TLRequestRegisterDevice.
I want to get notify when messages are coming from every chat.

I try to use something like this.

var tlRequestRegisterDevice = new TLRequestRegisterDevice(){ TokenType = 2, Token = _hash};
var notify = await _telegramClient.SendRequestAsync<TLMethod>(_tlRequestRegisterDevice);

Thanks.

[RiddlerKnight]

Hello I have tried this code so many times.

var state = await telegram.SendRequestAsync<TLState>(new TLRequestGetState());
var req = new TLRequestGetDifference() { date = state.date, pts = state.pts, qts = state.qts };
var diff = await telegram.SendRequestAsync<TLAbsDifference>(req) as TLDifference;

And I found that diff will be returned "TLDifferenceEmpty" always.

[Arvezz]

Does anyone know why why compiler cant find "lists"? I am trying read last message