Save user messages sent to bot and send finished form to other user

Question

For days I've been trying to solve this problem with my Telegram Bot.

I'm trying to send the user some questions after he "/start"s the bot.

I want to capture all user answers and then send it to some user that I want to see user answers in one message.

I tried to do it by sending inline buttons and couldn't find the way to wait for the next message from the user. I tried to store the answers in a string array, and it doesn't work either.

And at the end of the question, I want to send all user answers to some userid/channel in one message with all user questions.

I use Telegram.Bot library.

Here is my code

static string gotName = "0";
static string gotAge = "0";
static string gotMessage = "0";

static string[] Forminfo = { gotName, gotAge, gotMessage };


 async  private void Bot_OnUpdate(object sender, Telegram.Bot.Args.UpdateEventArgs e)
{
    if (e.Update.Type == UpdateType.Message && e.Update.Message.Text == "/start")
    {
        var streg = new InlineKeyboardMarkup(new[]
        {
            new [] // first row
            {
                InlineKeyboardButton.WithCallbackData("Next Step","start")
            }
        });

        var update = e.Update.Message.Text;

        var strmsg = "To Start The Register please send the bot your name and click on Next Step";
        await bot.SendTextMessageAsync(e.Update.Message.Chat.Id, strmsg, ParseMode.Html, replyMarkup: streg);
        var usermsg = await bot.GetUpdatesAsync();
        Forminfo[0] = usermsg.ToString();
    }
}


async private void Bot_OnCallbackQuery(object sender, Telegram.Bot.Args.CallbackQueryEventArgs e)
{            
    var streg1 = new InlineKeyboardMarkup(new[]
    {
        new [] // first row
        {
            InlineKeyboardButton.WithCallbackData("Next","start1")
        }
    });

    if (Forminfo[0] != "0")
    {
        var startedmsg = "Hello " + Forminfo[0].ToString() + "\n" +
                "Please Send us your Age and click Next";
        try
        {
            await bot.SendTextMessageAsync(e.CallbackQuery.Message.Chat.Id, startedmsg, ParseMode.Html, replyMarkup: streg1);
        }
        catch(HttpRequestException ex)
        {
            await bot.SendTextMessageAsync(e.CallbackQuery.Message.Chat.Id, "To Many Request Please Try Later.", ParseMode.Html);
        }
    }
}

Answer 1

There are a couple things to fix:

• If all you are handling inside your OnUpdate callback are messages, use OnMessage instead
• You are using OnUpdate and then manually call GetUpdates. You can't mix multiple approaches of getting updates - the StartReceiving call already handles calling GetUpdates internally.
• By having one string[] as the result, you are assuming only one user will use the bot at the same time. A better approach would be to use a Dictionary<userId, result>.
• In your SendTextMessageAsync call, you don't have to set ParseMode if you are sending regular text
• I don't see what you are using the buttons for if you're never checking whether the user clicked them

This is a code example that does what you want, but does not validate the input at all:

const long TargetChannelId = 123456;
static readonly ConcurrentDictionary<int, string[]> Answers = new ConcurrentDictionary<int, string[]>();
private static async void Bot_OnMessage(object sender, MessageEventArgs e)
{
    Message message = e.Message;
    int userId = message.From.Id;

    if (message.Type == MessageType.Text)
    {
        if (Answers.TryGetValue(userId, out string[] answers))
        {
            if (answers[0] == null)
            {
                answers[0] = message.Text;
                await Bot.SendTextMessageAsync(message.Chat, "Now send me your age");
            }
            else if (answers[1] == null)
            {
                answers[1] = message.Text;
                await Bot.SendTextMessageAsync(message.Chat, "Now send me your message");
            }
            else
            {
                Answers.TryRemove(userId, out string[] _);
                await Bot.SendTextMessageAsync(message.Chat, "Thank you, that's all I need from you");

                string answersText = $"User {answers[0]}, aged {answers[1]} sent the following message:\n{message.Text}";
                await Bot.SendTextMessageAsync(TargetChannelId, answersText);
            }
        }
        else
        {
            Answers.TryAdd(userId, new string[2]);
            await Bot.SendTextMessageAsync(message.Chat, "Please send me your name");
        }
    }
}