This article shows you how to send an audio file (e.g. an MP3 file) to a registered Telegram group in Microsoft’s .NET language: C# using Visual Studio 2022.
If you are using Visual Studio 2019, please read this tutorial instead.
To send a Telegram message containing an audio file in C# using Visual Studio 2022, do this:
- First, learn how to send a simple text message to a group on the official site.
- With the above knowledge, you can now download our sample code.
- Locate the file
cs_vs2022/group-send-telegram-mp3.cs
.This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode charactersusing System; using System.Net; using System.Text.Json; using System.IO; using System.Text; class TelegramGroupMp3Sender { // TODO: Replace the following with your gateway instance ID, client ID and secret! private static string INSTANCE_ID = "YOUR_INSTANCE_ID"; private static string CLIENT_ID = "YOUR_CLIENT_ID_HERE"; private static string CLIENT_SECRET = "YOUR_CLIENT_SECRET_HERE"; private static string AUDIO_GROUP_API_URL = "https://api.whatsmate.net/v3/telegram/group/audio/message/" + INSTANCE_ID; static void Main(string[] args) { TelegramGroupMp3Sender mp3Sender = new TelegramGroupMp3Sender(); // TODO: Put down group name and group admin below string group_name = "Muscle Men Club"; string group_admin = "19159876123"; // TODO: Remember to copy the MP3 file from ..\assets to the TEMP directory! string base64Content = convertFileToBase64("C:\\TEMP\\ocean-waves.mp3"); string fn = "anyname.mp3"; string caption = "Enjoy the nature"; mp3Sender.sendAudio(group_name, group_admin, base64Content, fn, caption); Console.WriteLine("Press Enter to exit."); Console.ReadLine(); } // http://stackoverflow.com/questions/25919387/c-sharp-converting-file-into-base64string-and-back-again static public string convertFileToBase64(string fullPathToDoc) { Byte[] bytes = File.ReadAllBytes(fullPathToDoc); String base64Encoded = Convert.ToBase64String(bytes); return base64Encoded; } public bool sendAudio(string group_name, string group_admin, string base64Content, string fn, string caption) { bool success = true; try { HttpWebRequest httpRequest = (HttpWebRequest)WebRequest.Create(AUDIO_GROUP_API_URL); httpRequest.Method = "POST"; httpRequest.Accept = "application/json"; httpRequest.ContentType = "application/json"; httpRequest.Headers["X-WM-CLIENT-ID"] = CLIENT_ID; httpRequest.Headers["X-WM-CLIENT-SECRET"] = CLIENT_SECRET; GroupAudioPayload payloadObj = new GroupAudioPayload() { group_name = group_name, group_admin = group_admin, audio = base64Content, filename = fn, caption = caption}; string postData = JsonSerializer.Serialize(payloadObj); using (var streamWriter = new StreamWriter(httpRequest.GetRequestStream())) { streamWriter.Write(postData); } var httpResponse = (HttpWebResponse)httpRequest.GetResponse(); using (var streamReader = new StreamReader(httpResponse.GetResponseStream())) { var result = streamReader.ReadToEnd(); Console.WriteLine(result); } } catch (WebException webExcp) { Console.WriteLine("A WebException has been caught."); Console.WriteLine(webExcp.ToString()); WebExceptionStatus status = webExcp.Status; if (status == WebExceptionStatus.ProtocolError) { Console.Write("The REST API server returned a protocol error: "); HttpWebResponse? httpResponse = webExcp.Response as HttpWebResponse; Stream stream = httpResponse.GetResponseStream(); StreamReader reader = new StreamReader(stream); String body = reader.ReadToEnd(); Console.WriteLine((int)httpResponse.StatusCode + " - " + body); success = false; } } catch (Exception e) { Console.WriteLine("A general exception has been caught."); Console.WriteLine(e.ToString()); success = false; } return success; } public class GroupAudioPayload { public string group_name { get; set; } public string group_admin { get; set; } public string audio { get; set; } public string filename { get; set; } public string caption { get; set; } } } - Study the
C#
source code and customize the TODO/FIXME lines. - Run the
C#
program in Visual Studio to send your group the first MP3 file!
Happy coding :)