Discussion of article "How to create bots for Telegram in MQL5" - page 13

[leonerd]

Good afternoon.

Can the bot receive messages through the channel?

I have assigned the bot as an administrator. New messages it sees, but the text is always a blank line.

msg.message_text=item["message"]["text"].ToStr();
msg.message_text=StringDecode(msg.message_text);

Here it is always a blank line.

[leonerd]

leonerd:

Good afternoon.

Can the bot receive messages through the channel?

I have assigned the bot as an administrator. It sees new messages, but the text is always a blank line.

Here it is always a blank line.

In the channel_post field everything comes in https://core.telegram.org/bots/api#update.

It would be nice to refine the class. I will add the channel_post_text field to CCustomMessage. And fill it in GetUpdates().

[leonerd]

            msg.chat_id=item["message"]["chat"]["id"].ToInt();

            msg.chat_first_name=item["message"]["chat"]["first_name"].ToStr();
            msg.chat_first_name=StringDecode(msg.chat_first_name);

            msg.chat_last_name=item["message"]["chat"]["last_name"].ToStr();
            msg.chat_last_name=StringDecode(msg.chat_last_name);

            msg.chat_username=item["message"]["chat"]["username"].ToStr();
            msg.chat_username=StringDecode(msg.chat_username);

            msg.chat_type=item["message"]["chat"]["type"].ToStr();

Only for some reason for chat from the channel all these fields are null.

[leonerd]

leonerd:
Only for some reason all these fields are null for chat from a channel.

For a channel you should look at the channel_post field, not the message field. channel_post is also of Message type.

I get the text:

msg.channel_post_text=item["channel_post"]["text"].ToStr();
msg.channel_post_text=StringDecode(msg.channel_post_text);

But other fields are not:

msg.channel_post_chat_id=item["channel_post"]["chat"]["id"].ToInt();
//---
msg.channel_post_from_first_name=item["channel_post"]["from"]["first_name"].ToStr();     
msg.channel_post_from_first_name=StringDecode(msg.channel_post_from_first_name);

[leonerd]

//---
            msg.channel_post_text=item["channel_post"]["text"].ToStr();
            msg.channel_post_text=StringDecode(msg.channel_post_text);

            long msg_id=item["channel_post"]["message_id"].ToInt();
            long msg_date=item["channel_post"]["date"].ToInt();



            //---
            msg.channel_post_chat_id=item["channel_post"]["chat"]["id"].ToInt();
            //---
            msg.channel_post_from_first_name=item["channel_post"]["from"]["first_name"].ToStr();     
            msg.channel_post_from_first_name=StringDecode(msg.channel_post_from_first_name);

The first three fields receive the value. But the last three fields (for fields like Chat and From) do not receive the value. Where to look?

[leonerd]

Figured it out.

channel_post.chat_id - can be negative, and I took it for a crooked value.

channel_post.from.first_name - from - optional field, can be without it. In general, everything is here https://core.telegram.org/bots/api#message

[Zixu Li]

I tried this code in OnInit() to send a message to my channel. but it does not work, can you give me example on how to send message to a channel or group chat?

thanks

bot.SendMessage("t.me/BotSignals","Hello",false,false);

[Alexandr Mordashov]

Please help me with advice. I added theterminal settings. Through the browser the request is executed successfully https://api.telegram.org/bot&lt;token>/sendMessage?chat_id=<id>&text=test.

The lines of code below are executed, but SendMessage returns error code 5203 (Error as a result of HTTP request execution). The bot.GetMe() method returns the same 5203 error.

What could be the problem? Thanks!

      bot.Token("<token>"); //set token
  int _res = bot.SendMessage(<id>, "test"); //your ID

[Alexandr Mordashov]

Thank you all! I figured it out. I guess the problem is RF and blocking.

[Павел Falcone]

Hello, I have taken a bot that will share signals through a group. I ran the code through MetaEditor, changed it and can't compile it. I got so many errors