Discuss "VB.Net/C# BBCode Function" in the .Net forum.

jmurrayhead · #1 (**permalink**) March 20th, 2008, 09:44 AM

I've looked all over the net for something like this for ASP.Net and couldn't find what I needed. After reviewing several pages, I was able to use individual pieces of information to build this simple regular expression to parse BBCode into HTML.
I thought something like this would be really long and complicated, but it's not at all:

VB.Net code:

Code:

    Public Function BBCode(ByVal strTextToReplace As String) As String
        '//Define regex
        Dim regExp As Regex
 
        '//Regex for URL tag without anchor
        regExp = New Regex("\[url\]([^\]]+)\[\/url\]")
        strTextToReplace = regExp.Replace(strTextToReplace, "<a href="http://www.developerbarn.com/asp-net/"$1"">$1</a>")
 
        '//Regex for URL with anchor
        regExp = New Regex("\[url=([^\]]+)\]([^\]]+)\[\/url\]")
        strTextToReplace = regExp.Replace(strTextToReplace, "<a href="http://www.developerbarn.com/asp-net/"$1"">$2</a>")
 
        '//Image regex
        regExp = New Regex("\[img\]([^\]]+)\[\/img\]")
        strTextToReplace = regExp.Replace(strTextToReplace, "<img src="http://www.developerbarn.com/asp-net/"$1"" />")
 
        '//Bold text
        regExp = New Regex("\[b\](.+?)\[\/b\]")
        strTextToReplace = regExp.Replace(strTextToReplace, "<b>$1</b>")
 
        '//Italic text
        regExp = New Regex("\[i\](.+?)\[\/i\]")
        strTextToReplace = regExp.Replace(strTextToReplace, "<i>$1</i>")
 
        '//Underline text
        regExp = New Regex("\[u\](.+?)\[\/u\]")
        strTextToReplace = regExp.Replace(strTextToReplace, "<u>$1</u>")
 
        '//Font size
        regExp = New Regex("\[size=([^\]]+)\]([^\]]+)\[\/size\]")
        strTextToReplace = regExp.Replace(strTextToReplace, "<span style=""font-size: $1px"">$2</span>")
 
        '//Font color
        regExp = New Regex("\[color=([^\]]+)\]([^\]]+)\[\/color\]")
        strTextToReplace = regExp.Replace(strTextToReplace, "<span style=""color: $1"">$2</span>")
 
        Return strTextToReplace
    End Function

C# Code:

Code:

public string BBCode(string strTextToReplace) 
{ 
 
    ////Define regex 
    Regex regExp; 
 
    ////Regex for URL tag without anchor 
    regExp = new Regex(@"\[url\]([^\]]+)\[\/url\]"); 
    strTextToReplace = regExp.Replace(strTextToReplace, "<a href=\"$1\">$1</a>"); 
 
    ////Regex for URL with anchor 
    regExp = new Regex(@"\[url=([^\]]+)\]([^\]]+)\[\/url\]"); 
    strTextToReplace = regExp.Replace(strTextToReplace, "<a href=\"$1\">$2</a>"); 
 
    ////Image regex 
    regExp = new Regex(@"\[img\]([^\]]+)\[\/img\]"); 
    strTextToReplace = regExp.Replace(strTextToReplace, "<img src=\"$1\" />"); 
 
    ////Bold text 
    regExp = new Regex(@"\[b\](.+?)\[\/b\]"); 
    strTextToReplace = regExp.Replace(strTextToReplace, "<b>$1</b>"); 
 
    ////Italic text 
    regExp = new Regex(@"\[i\](.+?)\[\/i\]"); 
    strTextToReplace = regExp.Replace(strTextToReplace, "<i>$1</i>"); 
 
    ////Underline text 
    regExp = new Regex(@"\[u\](.+?)\[\/u\]"); 
    strTextToReplace = regExp.Replace(strTextToReplace, "<u>$1</u>"); 
 
    ////Font size
    regExp = new Regex(@"\[size=([^\]]+)\]([^\]]+)\[\/size\]");
    strTextToReplace = regExp.Replace(strTextToReplace, "<span style=\"font-size: $1px\">$2</span>"); 
 
    ////Font color
    regExp = new Regex(@"\[color=([^\]]+)\]([^\]]+)\[\/color\]");
    strTextToReplace = regExp.Replace(strTextToReplace, "<span style=\"color: $1\">$2</span>");               
 
    return strTextToReplace; 
}

This uses block brackets to define the BBCode. For example, if you wanted to place a URL on your page, you would write it like this:
[ url=http://www.developerbarn.com]DeveloperBarn Forums[/ url] (without the spaces in the brackets).
You can easily adapt it with other BBCode if you understand Regex. I'll add more examples as I get time.
Note: C# isn't my native language

So, if you find an error in the above C# code, let me know and I'll fix it.

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ASP.NET Zone - bbCode mit RegEx ersetzen	This thread	Refback	July 16th, 2008 10:01 PM

Discuss "VB.Net/C# BBCode Function" in the .Net forum.

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