a friend of mine (who is not a developer) has told me that facebook is somehow affiliated with youtube and his reason was that if you type a video URL in the post box in facebook it automatically appears as video
it took me 10 minutes to build this demo,
this demo takes a block of text “post text ” which presumably includes a youtube URL and turns it into a youtube video in a webpage
1: private const string FIND_URL_REGEX = "http://([\\w+?\\.\\w+])+([a-zA-Z0-9\\~\\!\\@\\#\\$\\%\\^\\&\\*\\(\\)_\\-\\=\\+\\\\\\/\\?\\.\\:\\;\\'\\,]*)?";
2: private const string YOUTUBE_TEMPLATE = "<object width=\"425\" height=\"355\"><param name=\"movie\" value=\"http://www.youtube.com/v/{0}&hl=en\"><embed src=\"http://www.youtube.com/v/{0}&hl=en\" type=\"application/x-shockwave-flash\" width=\"425\" height=\"355\"></object>";
3: private const string URL_TEMPLATE = "<a href=\"{0}\">{0}</a>";
4:
5:
6: protected string MakeLinks(string txt)
7: {
8: Regex regx = new Regex(FIND_URL_REGEX, RegexOptions.IgnoreCase);
9: MatchCollection mactches = regx.Matches(txt);
10: foreach (Match match in mactches)
11: {
12: if (match.Value.ToLower().Contains("youtube.com"))
13: {
14: try
15: {
16: txt = txt.Replace(match.Value, string.Format(YOUTUBE_TEMPLATE, match.Value.Split('=')[1].Split('&')[0]));
17: }
18: catch { }
19: }
20: else
21: {
22: txt = txt.Replace(match.Value, string.Format(URL_TEMPLATE, match.Value));
23: }
24: }
25: return txt;
26: }
27:
28:
the previous code takes a block of text assuming this is what the user has posted and switches and text that looks like a URL to a hyper link and any youtube URL to video block
