论坛贴代码关键字变色的效果是怎么实现的，winform中可否实现

[josxhn]

比如csdn中用 [.code=C#][/code] 括一段代码，代码中的关键字，注释，字符串等等就会自动变色，这个功能怎么实现的？
可否在winform中实现该功能，需要什么控件。

[whowhen21]

这是UBB代码嘛，服务器输出的时候还不是转换成了 HTML 了啦，如果想显示，可以直接用 WebBrowser 控件。
顺便给你个UBB2HTML的js代码，可以翻译成C#版的。

function ubb2html(sUBB)
{
	var i,sHtml=String(sUBB),arrcode=new Array(),cnum=0;

	sHtml=sHtml.replace(/&/ig, '&');
	sHtml=sHtml.replace(/[<>]/g,function(c){return {'<':'<','>':'>'}[c];});
	sHtml=sHtml.replace(/\r?\n/g,"<br />");
	
	sHtml=sHtml.replace(/\[code\s*(?:=\s*([^\]]+?))?\]([\s\S]*?)\[\/code\]/ig,function(all,t,c){//code特殊处理
		cnum++;arrcode[cnum]=all;
		return "[\tubbcodeplace_"+cnum+"\t]";
	});

	sHtml=sHtml.replace(/\[(\/?)(b|u|i|s|sup|sub)\]/ig,'<$1$2>');
	sHtml=sHtml.replace(/\[color\s*=\s*([^\]"]+?)(?:"[^\]]*?)?\s*\]/ig,'<font color="$1">');
	sHtml=sHtml.replace(/\[size\s*=\s*(\d+?)\s*\]/ig,'<font size="$1">');
	sHtml=sHtml.replace(/\[font\s*=\s*([^\]"]+?)(?:"[^\]]*?)?\s*\]/ig,'<font face="$1">');
	sHtml=sHtml.replace(/\[\/(color|size|font)\]/ig,'</font>');
	sHtml=sHtml.replace(/\[back\s*=\s*([^\]"]+?)(?:"[^\]]*?)?\s*\]/ig,'<span style="background-color:$1;">');
	sHtml=sHtml.replace(/\[\/back\]/ig,'</span>');
	for(i=0;i<3;i++)sHtml=sHtml.replace(/\[align\s*=\s*([^\]"]+?)(?:"[^\]]*?)?\s*\](((?!\[align(?:\s+[^\]]+)?\])[\s\S])*?)\[\/align\]/ig,'<p align="$1">$2</p>');
	sHtml=sHtml.replace(/\[img\]\s*(((?!")[\s\S])+?)(?:"[\s\S]*?)?\s*\[\/img\]/ig,'<img src="$1" alt="" />');
	sHtml=sHtml.replace(/\[img\s*=([^,\]]*)(?:\s*,\s*(\d*%?)\s*,\s*(\d*%?)\s*)?(?:,?\s*(\w+))?\s*\]\s*(((?!")[\s\S])+?)(?:"[\s\S]*)?\s*\[\/img\]/ig,function(all,alt,p1,p2,p3,src){
		var str='<img src="'+src+'" alt="'+alt+'"',a=p3?p3:(!isNum(p1)?p1:'');
		if(isNum(p1))str+=' width="'+p1+'"';
		if(isNum(p2))str+=' height="'+p2+'"'
		if(a)str+=' align="'+a+'"';
		str+=' />';
		return str;
	});
	sHtml=sHtml.replace(/\[emot\s*=\s*([^\]"]+?)(?:"[^\]]*?)?\s*\/\]/ig,'<img emot="$1" />');
	sHtml=sHtml.replace(/\[url\]\s*(((?!")[\s\S])*?)(?:"[\s\S]*?)?\s*\[\/url\]/ig,'<a href="$1">$1</a>');
	sHtml=sHtml.replace(/\[url\s*=\s*([^\]"]+?)(?:"[^\]]*?)?\s*\]\s*([\s\S]*?)\s*\[\/url\]/ig,'<a href="$1">$2</a>');
	sHtml=sHtml.replace(/\[email\]\s*(((?!")[\s\S])+?)(?:"[\s\S]*?)?\s*\[\/email\]/ig,'<a href="mailto:$1">$1</a>');
	sHtml=sHtml.replace(/\[email\s*=\s*([^\]"]+?)(?:"[^\]]*?)?\s*\]\s*([\s\S]+?)\s*\[\/email\]/ig,'<a href="mailto:$1">$2</a>');
	sHtml=sHtml.replace(/\[quote\]([\s\S]*?)\[\/quote\]/ig,'<blockquote>$1</blockquote>');
	sHtml=sHtml.replace(/\[flash\s*(?:=\s*(\d+)\s*,\s*(\d+)\s*)?\]\s*(((?!")[\s\S])+?)(?:"[\s\S]*?)?\s*\[\/flash\]/ig,function(all,w,h,url){
		if(!w)w=480;if(!h)h=400;
		return '<embed type="application/x-shockwave-flash" src="'+url+'" wmode="opaque" quality="high" bgcolor="#ffffff" menu="false" play="true" loop="true" width="'+w+'" height="'+h+'"/>';
	});
	sHtml=sHtml.replace(/\[media\s*(?:=\s*(\d+)\s*,\s*(\d+)\s*(?:,\s*(\d+)\s*)?)?\]\s*(((?!")[\s\S])+?)(?:"[\s\S]*?)?\s*\[\/media\]/ig,function(all,w,h,play,url){
		if(!w)w=480;if(!h)h=400;
		return '<embed type="application/x-mplayer2" src="'+url+'" enablecontextmenu="false" autostart="'+(play=='1'?'true':'false')+'" width="'+w+'" height="'+h+'"/>';
	});
	sHtml=sHtml.replace(/\[table\s*(?:=\s*(\d{1,4}%?)\s*(?:,\s*([^\]"]+)(?:"[^\]]*?)?)?)?\s*\]/ig,function(all,w,b){
		var str='<table';
		if(w)str+=' width="'+w+'"';
		if(b)str+=' bgcolor="'+b+'"';
		return str+'>';
	});
	sHtml=sHtml.replace(/\[tr\s*(?:=\s*([^\]"]+?)(?:"[^\]]*?)?)?\s*\]/ig,function(all,bg){
		return '<tr'+(bg?' bgcolor="'+bg+'"':'')+'>';
	});
	sHtml=sHtml.replace(/\[td\s*(?:=\s*(\d{1,2})\s*,\s*(\d{1,2})\s*(?:,\s*(\d{1,4}%?))?)?\s*\]/ig,function(all,col,row,w){
		return '<td'+(col>1?' colspan="'+col+'"':'')+(row>1?' rowspan="'+row+'"':'')+(w?' width="'+w+'"':'')+'>';
	});
	sHtml=sHtml.replace(/\[\/(table|tr|td)\]/ig,'</$1>');
	
	sHtml=sHtml.replace(/\[\*\]((?:(?!\[\*\]|\[\/list\]|\[list\s*(?:=[^\]]+)?\])[\s\S])+)/ig,'<li>$1</li>');
	sHtml=sHtml.replace(/\[list\s*(?:=\s*([^\]"]+?)(?:"[^\]]*?)?)?\s*\]/ig,function(all,type){
		var str='<ul';
		if(type)str+=' type="'+type+'"';
		return str+'>';
	});
	sHtml=sHtml.replace(/\[\/list\]/ig,'</ul>');
	
	for(i=1;i<=cnum;i++)sHtml=sHtml.replace("[\tubbcodeplace_"+i+"\t]", arrcode[i]);

	sHtml=sHtml.replace(/(^|<\/?\w+(?:\s+[^>]*?)?>)([^<$]+)/ig, function(all,tag,text){
		return tag+text.replace(/[\t ]/g,function(c){return {'\t':'        ',' ':' '}[c];});
	});
	function isNum(s){if(s!=null&&s!='')return !isNaN(s);else return false;}
	
	return sHtml;
}

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[josxhn]

研究下再结贴，多谢！

[artoriar]

UBB，扣扣给你C#代码