BBCode Parser : The Official Microsoft ASP.NET Forums

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jpoma

Member

1 Points

9 Posts

BBCode Parser

Mar 15, 2007 07:45 PM|LINK

Hi all,

I'm looking for a BBCode-style code parser. Is there one out there? I want the create the ability for a asp.net form user to be able to use simple formatting, but don't want to allow the person to use standard html tags.

Thanx

Moved by XIII on Mar 15, 2007 08:16 PM

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imran.nathan...

Contributor

4615 Points

836 Posts

Re: BBCode Parser

Mar 15, 2007 10:09 PM|LINK

i am sure u have googled it out & not found anything....thats y u r here.......but writing a parser is very easy with .net as the string datatype has many methods like Split() etc & also u could use the StringBuilder object which also has many useful methods.

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jpoma

Member

1 Points

9 Posts

Re: BBCode Parser

Mar 16, 2007 04:15 PM|LINK

Well, I decided to go at it on my own using regular expressions... here's what i have started with...

         'URL replacement [URL]link[/URL] -> <a href="link" target="_blank">link</a>
        inString = Regex.Replace(inString, "\[url\]([^\]]+)\[\/url\]", "<a href=""$1"" target=""_blank"">$1</a>", RegexOptions.IgnoreCase)
        'URL replacement text -> <a href="link" target="_blank">text</a>
        inString = Regex.Replace(inString, "\[url=([^\]]+)\]([^\]]+)\[\/url\]", "<a href=""$1"" target=""_blank"">$2</a>", RegexOptions.IgnoreCase)
        'B replacement [B]text[/B] -> <strong>text</strong>
        inString = Regex.Replace(inString, "\[b\]([^\]]+)\[\/b\]", "<strong>$1</strong>", RegexOptions.IgnoreCase)

I'm using case insensitivity. I will eventually be adding more as I go.

If this helps you, you're welcome [:P]

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Mike343

Member

149 Points

45 Posts

Re: BBCode Parser

Mar 17, 2007 07:36 AM|LINK

Your welcome to use my bbcode class that I built a while ago.

using System.Collections.Generic;
using System.Text.RegularExpressions;

namespace NetCoders.Helpers
{
    /// <summary>
    /// BBCode Helper allows formatting of text
    /// without the need to use html
    /// </summary>
    public class BBCodeHelper
    {
        #region Helper Classes
        interface IHtmlFormatter
        {
            string Format(string data);
        }

        protected class RegexFormatter : IHtmlFormatter
        {
            private string _replace;
            private Regex _regex;

            public RegexFormatter(string pattern, string replace)
                : this(pattern, replace, true)
            {

}

            public RegexFormatter(string pattern, string replace, bool ignoreCase)
            {
                RegexOptions options = RegexOptions.Compiled;

                if (ignoreCase)
                {
                    options |= RegexOptions.IgnoreCase;
                }

                _replace = replace;
                _regex = new Regex(pattern, options);
            }

            public string Format(string data)
            {
                return _regex.Replace(data, _replace);
            }
        }

        protected class SearchReplaceFormatter : IHtmlFormatter
        {
            private string _pattern;
            private string _replace;

            public SearchReplaceFormatter(string pattern, string replace)
            {
                _pattern = pattern;
                _replace = replace;
            }

            public string Format(string data)
            {
                return data.Replace(_pattern, _replace);
            }
        }
        #endregion

#region BBCode
static List<IHtmlFormatter> _formatters;

        static BBCodeHelper()
        {
            _formatters = new List<IHtmlFormatter>();

_formatters.Add(new RegexFormatter(@"<(.|\n)*?>", string.Empty));

            _formatters.Add(new SearchReplaceFormatter("\r", ""));
            _formatters.Add(new SearchReplaceFormatter("\n\n", "</p><p>"));
            _formatters.Add(new SearchReplaceFormatter("\n", "<br />"));

            _formatters.Add(new RegexFormatter(@"\[b(?:\s*)\]((.|\n)*?)\[/b(?:\s*)\]", "<b>$1</b>"));
            _formatters.Add(new RegexFormatter(@"\[i(?:\s*)\]((.|\n)*?)\[/i(?:\s*)\]", "<i>$1</i>"));
            _formatters.Add(new RegexFormatter(@"\[s(?:\s*)\]((.|\n)*?)\[/s(?:\s*)\]", "<strike>$1</strike>"));

            _formatters.Add(new RegexFormatter(@"\[left(?:\s*)\]((.|\n)*?)\[/left(?:\s*)]", "<div style=\"text-align:left\">$1</div>"));
            _formatters.Add(new RegexFormatter(@"\[center(?:\s*)\]((.|\n)*?)\[/center(?:\s*)]", "<div style=\"text-align:center\">$1</div>"));
            _formatters.Add(new RegexFormatter(@"\[right(?:\s*)\]((.|\n)*?)\[/right(?:\s*)]", "<div style=\"text-align:right\">$1</div>"));

            string quoteStart = "<blockquote><b>$1 said:</b></p><p>";
            string quoteEmptyStart = "<blockquote>";
            string quoteEnd = "</blockquote>";

            _formatters.Add(new RegexFormatter(@"\[quote=((.|\n)*?)(?:\s*)\]", quoteStart));
            _formatters.Add(new RegexFormatter(@"\[quote(?:\s*)\]", quoteEmptyStart));
            _formatters.Add(new RegexFormatter(@"\[/quote(?:\s*)\]", quoteEnd));

            _formatters.Add(new RegexFormatter(@"\[url(?:\s*)\]www\.(.*?)\[/url(?:\s*)\]", "<a class=\"bbcode-link\" href=\"http://www.$1\" target=\"_blank\" title=\"$1\">$1</a>"));
            _formatters.Add(new RegexFormatter(@"\[url(?:\s*)\]((.|\n)*?)\[/url(?:\s*)\]", "<a class=\"bbcode-link\" href=\"$1\" target=\"_blank\" title=\"$1\">$1</a>"));
            _formatters.Add(new RegexFormatter(@"\[url=""((.|\n)*?)(?:\s*)""\]((.|\n)*?)\[/url(?:\s*)\]", "<a class=\"bbcode-link\" href=\"$1\" target=\"_blank\" title=\"$1\">$3</a>"));
            _formatters.Add(new RegexFormatter(@"\[url=((.|\n)*?)(?:\s*)\]((.|\n)*?)\[/url(?:\s*)\]", "<a class=\"bbcode-link\" href=\"$1\" target=\"_blank\" title=\"$1\">$3</a>"));
            _formatters.Add(new RegexFormatter(@"\[link(?:\s*)\]((.|\n)*?)\[/link(?:\s*)\]", "<a class=\"bbcode-link\" href=\"$1\" target=\"_blank\" title=\"$1\">$1</a>"));
            _formatters.Add(new RegexFormatter(@"\[link=((.|\n)*?)(?:\s*)\]((.|\n)*?)\[/link(?:\s*)\]", "<a class=\"bbcode-link\" href=\"$1\" target=\"_blank\" title=\"$1\">$3</a>"));

            _formatters.Add(new RegexFormatter(@"\[img(?:\s*)\]((.|\n)*?)\[/img(?:\s*)\]", "<img src=\"$1\" border=\"0\" alt=\"\" />"));
            _formatters.Add(new RegexFormatter(@"\[img align=((.|\n)*?)(?:\s*)\]((.|\n)*?)\[/img(?:\s*)\]", "<img src=\"$3\" border=\"0\" align=\"$1\" alt=\"\" />"));
            _formatters.Add(new RegexFormatter(@"\[img=((.|\n)*?)x((.|\n)*?)(?:\s*)\]((.|\n)*?)\[/img(?:\s*)\]", "<img width=\"$1\" height=\"$3\" src=\"$5\" border=\"0\" alt=\"\" />"));

_formatters.Add(new RegexFormatter(@"\[color=((.|\n)*?)(?:\s*)\]((.|\n)*?)\[/color(?:\s*)\]", "<span style=\"color=$1;\">$3</span>"));

_formatters.Add(new RegexFormatter(@"\[hr(?:\s*)\]", "<hr />"));

_formatters.Add(new RegexFormatter(@"\[email(?:\s*)\]((.|\n)*?)\[/email(?:\s*)\]", "<a href=\"mailto:$1\">$1</a>"));

            _formatters.Add(new RegexFormatter(@"\[size=((.|\n)*?)(?:\s*)\]((.|\n)*?)\[/size(?:\s*)\]", "<span style=\"font-size:$1\">$3</span>"));
            _formatters.Add(new RegexFormatter(@"\[font=((.|\n)*?)(?:\s*)\]((.|\n)*?)\[/font(?:\s*)\]", "<span style=\"font-family:$1;\">$3</span>"));
            _formatters.Add(new RegexFormatter(@"\[align=((.|\n)*?)(?:\s*)\]((.|\n)*?)\[/align(?:\s*)\]", "<span style=\"text-align:$1;\">$3</span>"));
            _formatters.Add(new RegexFormatter(@"\[float=((.|\n)*?)(?:\s*)\]((.|\n)*?)\[/float(?:\s*)\]", "<span style=\"float:$1;\">$3</div>"));

string sListFormat = "<ol class=\"bbcode-list\" style=\"list-style:{0};\">$1</ol>";

            _formatters.Add(new RegexFormatter(@"\[\*(?:\s*)]\s*([^\[]*)", "<li>$1</li>"));
            _formatters.Add(new RegexFormatter(@"\[list(?:\s*)\]((.|\n)*?)\[/list(?:\s*)\]", "<ul class=\"bbcode-list\">$1</ul>"));
            _formatters.Add(new RegexFormatter(@"\[list=1(?:\s*)\]((.|\n)*?)\[/list(?:\s*)\]", string.Format(sListFormat, "decimal"), false));
            _formatters.Add(new RegexFormatter(@"\[list=i(?:\s*)\]((.|\n)*?)\[/list(?:\s*)\]", string.Format(sListFormat, "lower-roman"), false));
            _formatters.Add(new RegexFormatter(@"\[list=I(?:\s*)\]((.|\n)*?)\[/list(?:\s*)\]", string.Format(sListFormat, "upper-roman"), false));
            _formatters.Add(new RegexFormatter(@"\[list=a(?:\s*)\]((.|\n)*?)\[/list(?:\s*)\]", string.Format(sListFormat, "lower-alpha"), false));
            _formatters.Add(new RegexFormatter(@"\[list=A(?:\s*)\]((.|\n)*?)\[/list(?:\s*)\]", string.Format(sListFormat, "upper-alpha"), false));
        }
        #endregion

        #region Format
        public static string Format(string data)
        {
            foreach (IHtmlFormatter formatter in _formatters)
            {
                data = formatter.Format(data);
            }

            return data;
        }
        #endregion
    }
}