Telegram.Bot.CommandHandler 1.4.4.2

Telegram Command Handler

A better way to detect and handle commands sent to a telegram client.

Requirements

• Telegram.Bot library
• .Net Core 2.2 or higher

Usage

Program.cs

Register your command classs(es) using commandHandler.RegisterCommands<Class> where Class is a subclass of CommandModule, then initialize the commandHandler with your botClient.

TelegramCommandHandler commandHandler = new TelegramCommandHandler();
commandHandler.RegisterCommands<Commands>();
botClient.InitializeCommands(commandHandler);
//MANDATORY
botClient.StartReceiving();

Commands.cs

public class Commands : CommandModule
{

    // All command methods MUST be async, have a return type of Task, have only a CommandContext as a parameter,
    // and have the [Command] attribute.
    // The parameter for the [Command] attribute indicates what invokes this method. DO NOT specify a prefix here.
    // When a user invokes the /sayhello command, the bot will respond with "Hello, world!".
    [Command("sayhello")]
    public async Task SayHello(CommandContext ctx)
    {
        await ctx.RespondAsync("Hello, world!");
    }

    // When a user invokes the /ping command, the bot will respond with "Pong!".
    [Command("ping")]
    public async Task Ping(CommandContext ctx)
    {
        await ctx.RespondAsync("Pong!");
    }

}

Extras

Prefix

You can change the / prefix to anything you want by passing a paremeter to the TelegramCommandHandler initialization, like so:

TelegramCommandHandler commandHandler = new TelegramCommandHandler("!");

This will cause ! to invoke your commands, instead of /.

Pre/Post-command execution

public override async Task BeforeExecutionAsync(CommandContext ctx)
{
    // Will be called before execution of a method
}

public override async Task AfterExecutionAsync(CommandContext ctx)
{
    // Will be called after executionn of a method
}