在 Telegram bot 中使用 HTML

Question

This is not a duplicated question. I want to use html codes in my telegram bot that is written by c#. I searched in SO but I did not find any answer. How to do that? I used TelegramBotSharp. Here is my code related to the part that I explained:

MessageTarget target = (MessageTarget)update.Chat ?? update.From;     
if(Text.StartsWith("Hello")) {
    bot.SendMessage(target, "Hello <a href='http://google.com'> dear</a>", true);
}

Answer 1

Use the following syntax in your message:

*bold text*

_italic text_

[inline URL](http://www.example.com/)

[inline mention of a user](tg://user?id=123456789)

pre-formatted fixed-width code block

Note: Only the tags mentioned above are currently supported.

Tags must not be nested.

All <, > and & symbols that are not a part of a tag or an HTML entity must be replaced with the corresponding HTML entities (< with &lt;, > with &gt; and & with &amp;).

All numerical HTML entities are supported.

The API currently supports only the following named HTML entities: <, >, & and ". <, >, & and ".

Answer 2

HTML mode

Pass HTML in the parse_mode field when using sendMessage .

Answer 3

If you need to format using html you need to set "parse_mode" as "html";

https://api.telegram.org/bot1328912345:BBCCDDExVAKD2GOEA1mXWfXfhQ_z8Y6rRh8/sendmessage?chat_id=12345678&text=Sample message&parse_mode=html)

As of now only following tags are supported by Bot:

<b>bold</b>, <strong>bold</strong>
<i>italic</i>, <em>italic</em>
<u>underline</u>, <ins>underline</ins>
<s>strikethrough</s>, <strike>strikethrough</strike>, <del>strikethrough</del>
<b>bold <i>italic bold <s>italic bold strikethrough</s> <u>underline italic bold</u></i> bold</b>
<a href="http://www.example.com/">inline URL</a>
<a href="tg://user?id=123456789">inline mention of a user</a>
<code>inline fixed-width code</code>
<pre>pre-formatted fixed-width code block</pre>
<pre><code class="language-python">pre-formatted fixed-width code block written in the Python programming language</code></pre>

Source: https://core.telegram.org/bots/api#formatting-options