Telegram C# example send message

Question

I can't find an example of sending message by telegram protocol from C#. I tried to use this but failed. Can you give me any examples?

Answer 1

TLSharp is basic implementation of Telegram API on C#. See it here https://github.com/sochix/TLSharp

Answer 2

You can use the WTelegramClient library to connect to Telegram Client API protocol (as a user, not a bot)

The library is very complete but also very easy to use. Follow the README on GitHub for an easy introduction.

To send a message to someone can be as simple as:

using TL;

using var client = new WTelegram.Client(); // or Client(Environment.GetEnvironmentVariable)
await client.LoginUserIfNeeded();
var result = await client.Contacts_ResolveUsername("USERNAME");
await client.SendMessageAsync(result.User, "Hello");

//or by phone number:
//var result = await client.Contacts_ImportContacts(new[] { new InputPhoneContact { phone = "+PHONENUMBER" } });
//client.SendMessageAsync(result.users[result.imported[0].user_id], "Hello");

Answer 3

For my bot I use Telegram.Bot nuget package. Full sample code is here.

Here is example of sending message in reply to incoming message.

// create bot instance
var bot = new TelegramBotClient("YourApiToken");

// test your api configured correctly
var me = await bot.GetMeAsync();
Console.WriteLine($"{me.Username} started");

// start listening for incoming messages
while (true) 
{
    //get incoming messages
    var updates = await bot.GetUpdatesAsync(offset);
    foreach (var update in updates)
    {
        // send response to incoming message
        await bot.SendTextMessageAsync(message.Chat.Id,"The Matrix has you...");
    }
}

Answer 4

The simplest way is to send http request directly to the Telegram BOT API as url string, you may test those url strings even in your browser, please see details in my another answer here: https://stackoverflow.com/a/57341990/11687179

Answer 5

at the first step you have to generate a bot in botfather then use the code in bellow in C#

    private void SendMessage(string msg)
    {
        string url = "https://api.telegram.org/{botid}:{botkey}/sendMessage?chat_id={@ChanalName}&text={0}";
        WebClient Client = new WebClient();
        /// If you need to use proxy 
        if (Program.UseProxy)
        {
            /// proxy elements are variable in Program.cs
            Client.Proxy = new WebProxy(Program.ProxyUrl, Program.ProxyPort);
            Client.Proxy.Credentials = new NetworkCredential("hjolany", "klojorasic");
        }
        Client.DownloadString(string.Format(url, msg));
        }));
    }

Answer 6

Telegram has an official API that can do exactly what you need, you will have to look into http requests though..

Here is the documentation on sending a message:

Function

messages.sendMessage

Params

peer    InputPeer   User or chat where a message will be sent
message string  Message text
random_id   long    Unique client message ID required to prevent message resending

Query example

(messages.sendMessage (inputPeerSelf) "Hello, me!" 12345678901)

Return errors

Code    Type    Description
400 BAD_REQUEST PEER_ID_INVALID Invalid peer
400 BAD_REQUEST MESSAGE_EMPTY   Empty or invalid UTF8 message was sent
400 BAD_REQUEST MESSAGE_TOO_LONG    Message was too long.

Current maximum length is 4096 UTF8 characters

For the full documentation go here.